WO2017032343A1 - Method and apparatus for transmitting he-ltf sequence - Google Patents

Abstract

Embodiments of the present invention provide several Long Training Field (LTF) sequences conforming to 802.11ax in a wireless local area network.

Description

Method and apparatus for transmitting HE-LTF sequences

This application is required to be submitted to the China Patent Office on August 26, 2015, the application number is 201510532381.2, the invention name is “method of transmitting information, access point and site”, and submitted to the Chinese Patent Office on November 26, 2015. The priority of the Chinese Patent Application No. 201510849062.4, entitled "Method and Apparatus for Transmitting HE-LTF Sequences", the entire contents of which is incorporated herein by reference.

Technical field

The present invention relates to the field of wireless communication technologies and, more particularly, to a method and apparatus for transmitting HE-LTF sequences.

Background technique

With the development of the mobile Internet and the popularity of smart terminals, data traffic has grown rapidly. Wireless Local Area Network (WLAN) has become one of the mainstream mobile broadband access technologies due to its high speed and low cost.

In order to greatly increase the service transmission rate of the WLAN system, the next generation of Institute of Electrical and Electronics Engineers (IEEE) 802.11ax standard will be in the existing Orthogonal Frequency Division Multiplexing (OFDM) technology. On the basis of the above, Orthogonal Frequency Division Multiple Access (OFDMA) technology is further adopted. The OFDMA technology divides the air interface time-frequency resources into a plurality of orthogonal time-frequency resource blocks (RBs). The RBs may be shared in time and orthogonal in the frequency domain.

In existing WiFi systems (such as 11n or 11ac), the terminal is still using the carrier mode of carrier sense collision avoidance for channel access. When the number of users increases, the average throughput of the system drops rapidly due to an increase in channel access conflicts. In the current work of the new WiFi standard (11ax), it has been decided to introduce OFDMA technology into the WiFi system to achieve the goal of increasing the average throughput of the system in a high-density scenario. As an important part of channel estimation in existing WiFi systems, LTF is also used in the OFDMA mode in the new WiFi standard. Therefore, in the OFDMA mode, the LTF generation method has become a research hotspot.

In the prior art, the LTF of 80 MHz or the LTF of 160 MHz in the 802.11ac standard is used as a basic template, and the value of the carrier part corresponding to the resource block scheduled by the user in the OFDMA mode is extracted therefrom, and the value of the carrier part not corresponding to the resource block is padded with 0. Generate LTFs used by users in OFDMA mode. However, with the prior art method, the Peak to Average Power Ratio (PAPR) is higher.

Summary of the invention

Embodiments of the present invention provide a method for transmitting wireless local area network information to reduce a peak average power ratio.

In one aspect, a method of transmitting wireless local area network information is provided, including:

Obtaining a corresponding HE-LTF sequence according to the bandwidth, where the HE-LTF sequence is specifically a sequence in each embodiment;

The corresponding sequence segments in the HE-LTF sequence are transmitted according to the RU size and RU location allocated for the station.

In another aspect, a method for receiving a wireless local area network PPDU includes:

Receiving a PPDU, and obtaining a total transmission bandwidth indicated in the PPDU;

Obtaining a corresponding HE-LTF sequence according to the bandwidth, where the HE-LTF sequence is specifically a sequence in each embodiment;

According to the RU size and the RU location, the corresponding HE-LTF sequence segment is selected as the channel estimation reference sequence corresponding to the RU at the receiving end.

Accordingly, means for performing the aforementioned method, such as an AP or STA, or a corresponding chip, are provided.

The HE-LTF sequence provided by the embodiment of the present invention has a relatively low PAPR in the next generation wireless local area network.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1a, 1b, and 1c are tone plans of different bandwidths in an OFDMA transmission mode according to an embodiment of the present invention;

2a, 2b are schematic diagrams of PAPRs obtained if LTF simulations of 802.11ac are used.

3 is a simplified schematic diagram of a wireless local area network according to an embodiment of the present invention;

4 is a schematic diagram showing a simple data structure of a PPDU in a multi-user transmission mode according to an embodiment of the present invention;

5a, 5b, 5c, and 5d are tone plans including pilot positions in different bandwidths of an OFDMA transmission mode according to an embodiment of the invention;

Figure 6 is a schematic diagram of a PAPR simulated in a poor implementation.

7a, 7b are simplified schematic views of the embodiment of the present invention in the uplink and downlink directions, respectively.

Figure 8a and Figure 8b show the PAPR values obtained by simulation using a better 2x HE-LTF sequence at 20MHz bandwidth.

Figure 9 shows the PAPR value obtained by simulation using a better 2x HE-LTF sequence at 40MHz.

Figure 10 and Figure 11 show the PAPR values obtained by simulation using a better 2x HE-LTF sequence at 80MHz.

Figure 12 shows the PAPR value obtained by simulation using a better 4x HE-LTF sequence at 20MHz bandwidth.

Figure 13 shows the PAPR value obtained by simulation using a better 4x HE-LTF sequence at 40MHz bandwidth.

Figure 14 shows the PAPR value obtained by simulation using a better 4x HE-LTF sequence at 80MHz bandwidth.

Figure 15 is a block diagram of an access point in accordance with an embodiment of the present invention.

Figure 16 is a block diagram of a station in accordance with an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

For ease of understanding, the terms that may appear in the following embodiments are explained as follows:

AP Access point

HEW High efficiency WLAN efficient wireless LAN

HE-LTF High efficiency Long training field

OFDMA Orthogonal Frequency Division Multiple Access Orthogonal Frequency Division Multiple Access

STA Station site

WLAN Wireless Local Area Networks Wireless LAN

An Access Point (AP), which can also be called a wireless access point or bridge or hotspot, can access a server or a communication network.

A station (STA, Station), which may also be referred to as a user, may be a wireless sensor, a wireless communication terminal, or a mobile terminal, such as a mobile phone (or "cellular" phone) that supports WiFi communication functions and a computer with wireless communication capabilities. For example, it may be a portable, pocket-sized, handheld, computer-built, wearable, or in-vehicle wireless communication device that supports WiFi communication functions, and exchanges communication data such as voice and data with the wireless access network.

The next-generation wireless LAN standard 802.11ax is dedicated to further improving WLAN spectrum efficiency, regional throughput, actual user experience, and performance in a variety of indoor and outdoor dense network deployment environments. The solution also requires suppression of inter-device interference to meet large-scale, High load networking requirements, etc. Traditional WiFi is mainly applied to indoor channels, OFDM transmission mode, symbol length is 3.2us, and subcarrier spacing is 1/3.2us=312.5kHz. OFDM symbols are constructed with 64-FFT in 20 MHz, 52 data subcarriers and 4 subcarriers in 56 subcarriers in total, and OFDM symbols are constructed with 128-FFT in 40 MHz, and 108 data subcarriers and 6 subcarriers in total 128 subcarriers The carrier, while the 256-FFT constructs an OFDM symbol, has 234 data subcarriers and 8 subcarriers out of a total of 256 subcarriers.

In order to support indoor and outdoor scenes, the 802.11ax system can use 4 times the symbol length of 802.11ac (4x3.2us=12.8us) and the subcarrier spacing is 312.5/4=78.125kHz. And in order to support the OFDMA transmission, the following tone plan (subcarrier distribution of data carrying) is adopted, and the positional relationship of different resource blocks (RU: resource unit) is as shown in FIG. 1a-1c, wherein the arrow indicates the residual subcarrier between the RUs. The location, the number of large RU subcarriers and the corresponding number of small RUs that can be accommodated therein and the number of residual subcarriers between small RUs are the same.

Referring to FIG. 1a, a simple schematic diagram of an OFDMA allocateable resource block (in English, a tone plan, or a resource block distribution) in FIG. 1b, FIG. 1b is a simple schematic diagram of an OFDMA resource block position in 40 MHz, and FIG. 1c is within 80 MHz. A simple schematic of the location of an OFDMA resource block. The OFDMA multi-user data packet in 802.11ax is a combination of multiple resource blocks (RU: resource unit). The AP allocates one RU to each user. The optional RUs that may be assigned to the user are:

1) RUs consisting of 26 consecutive subcarriers, including: 24 data subcarriers and 2 pilot pilot subcarriers;

2) RUs consisting of 52 consecutive subcarriers, including: 48 data subcarriers and 4 pilot pilot subcarriers;

3) RUs consisting of 106 consecutive subcarriers, including: 24 data subcarriers and 2 pilot pilot subcarriers;

4) RUs consisting of 242 consecutive subcarriers, including: 234 data subcarriers and 8 pilot pilot subcarriers;

5) RUs consisting of 484 consecutive subcarriers, including: 468 data subcarriers and 16 pilot pilot subcarriers;

6) RUs consisting of 996 consecutive subcarriers, including: 980 data subcarriers and 16 pilot pilot subcarriers.

Among them, 484-RU is used in 40MHz multi-user transmission, and 996-RU is used in 80/160MHz multi-user transmission. 160MHz can be seen as a combination of two 80MHz tone plans. The subcarrier position indicated by the arrow in Figures 1a, 1b, 1c is the position of the aforementioned pilot subcarrier.

In addition, the HE-LTF for channel estimation in the 802.11ax system adopts two modes of 2x and 4x, and the 4x mode refers to the subcarrier number index of the HE-LTF sequence mapping and the resource block distribution of the data part. The serial number is the same; and the 2x mode means that the HE-LTF serial number corresponds to the number of the 4x HE-LTF divided by 2, that is, the subcarrier number index of the HE-LTF sequence mapping and the resource block distribution in the data part. The half of the subcarrier number is the same.

The tone plan of the OFDMA transmission in the 802.11ax system is different from the tone plan of the OFDM in the existing 802.11ac system. Therefore, the 20/40 VHT-LTF sequence defined in 802.11ac itself cannot be applied. In a specific case, the total number of subcarriers of 80 MHz in 802.11ac is the same as the total number of subcarriers of 20 MHz in 802.11ax, but the peak value and the mean ratio (PAPR: Peak-to) are found directly in the 802.11ax 20 MHz bandwidth using the VHT-LTF sequence. -average power ratio) is relatively high.

Referring to Figures 2a, 2b, it can be seen that if the 802.11ac 80MHz VHT-LTF is used for 802.11ax 20MHz, PAPR and traditional LTF sequences have significantly improved PAPR, affecting power control efficiency, and thus reducing channel estimation accuracy.

In addition, 802.11ax is in the 40/80MHz tone plan, the number of subcarriers has exceeded the traditional sequence, and the VHT-LTF sequence of 802.11ac cannot be reused.

FIG. 3 is a simplified schematic diagram of a WLAN system to which an embodiment of the present invention is applied. The system of Figure 3 includes one or more access points AP 101 and one or more stations STA 102. The OFDMA technology is used for wireless communication between the access point 101 and the station 102.

Referring to FIG. 4, it is a frame structure of a possible AP sending data packet PPDU for the downlink WLAN system. In a specific example, it complies with the relevant provisions of 802.11ax.

According to the data structure of the PPDU shown in FIG. 4, for the downlink multi-user PPDU sent by the AP, the information indicating the transmission bandwidth of the downlink user STA is included in the HE-SIG-A, and is included in the HE-SIG-B for indicating The information about the size and location of the RU allocated by the downlink scheduled user, or the scheduling information corresponding to the STA ID and other spatial stream numbers or modulation codes of each scheduled user. In one example, the HE-SIG-A or HE-SIG-B may further include: a HE-LTF length for indicating alignment of a plurality of users, that is, a symbol number N of the HE-LTF.

In another embodiment, for each RU in the subcarrier distribution tone plan of the OFDMA of the HE-LTF, the number of pilot subcarriers, the location of the pilot subcarrier, and the transmission mode are given. The corresponding content can refer to "Motion #3, October 29, 2014, Removed with Motion 10, March 6, 2015 below"

For example, referring to Figures 5a, 5b, 5c, and Figure 5d, based on the tone plan shown in Figures 1a, 1b, and 1c, the positions of the pilot subcarriers are indicated, i.e., the long arrows in Figures 5a, 5b, 5c, and Figure 5d. The location shown. For example, the transmission method is: the pilot of the 802.11ax HE-LTF is transmitted in a single stream (similar to 802.11ac) in single-user, uplink-downlink OFDMA, and downlink MU-MIMO transmission.

In a specific example, when uplink MU-MIMO transmission is performed, the HE-LTF sequence of each STA is multiplied by the identification code assigned by the AP, and the AP can estimate the CFO of each STA by using the frequency identification code of each STA, so There is no special pilot subcarrier in the HE-LTF sequence of the MU-MIMO, which is different from the HE-LTF sequence of the downlink MU-MIMO.

In some poor implementations, some HE-LTF or methods of constructing HE-LTF are provided, but none of the effects of the pilot are considered, and the PAPR is relatively high in the corresponding method.

For example, a poor way of embodiments, there is provided a Barker sequence of length 13, i.e. as x, to generate a sequence of length 121 according to the Barker sequence is represented by M _1, while finding the Barker sequence of lengths of 7 and 13, They are represented by M ₂ and M ₃ , respectively. The specific sequence is represented as follows:

x=[+1 +1 +1 -1 -1 -1 +1 -1 -1 +1 -1];%Barker 11 tones

M ₁ =[-x,x,-x,-x,x,-x,-x,-x,x,x,x];%121 tones

M ₂ =[+1 +1 +1 +1 +1 -1 -1 +1 +1 -1 +1 -1 +1];%Barker 13 tones

M ₃ =[+1 +1 +1 -1 -1 +1 -1];%Barker 7 tones

Next, the HELTF sequence in the 2x/4x mode is constructed using the x, M ₁ , M ₂ , M ₃ sequences. The constructed HELTF sequence is as follows:

HELTF sequence in 2x mode:

20MHz 122 tones 2X sequence:

LTF ₂₄₂ (-122:2:122)=[M ₁ (61:121),0,M ₁ (1:61)];

40MHz 242tones 2X sequence:

LTF ₄₈₄ (-244:2:244)=[M ₁ ,0,0,0,M ₁ ];

80MHz 498 tones 2X sequence:

LTF ₉₉₆ (-500:2:500)=[-M ₁ ,-M ₁ ,M ₃ ,0,0,0,M ₃ ,M ₁ ,-M ₁ ];

HELTF sequence in 4x mode:

20MHz 242tones 4X sequence:

LTF ₂₄₂ (-122:122)=[M ₁ ,0,0,0,M ₁ ];

40MHz 484 tones 4X sequence:

LTF ₄₈₄ = [M ₁ , M ₁ , 0, ₀ , 0, ₀ , 0, M ₁ , -M ₁ ];

80MHz 996 tones 4X sequence:

LTF ₉₉₆ =

[M ₁ , -M ₁ , -M ₁ , -M ₁ , M ₂ ,1,0,0,0,0,0,1,M ₂ ,M ₁ ,-M ₁ ,M ₁ ,M ₁ ];

However, analyzing all the cases in which the pilot subcarriers and other subcarriers in the HE-LTF in the above-mentioned FIG. 5a, 5b, 5c or 5d are multiplied by different phases, it can be seen that the PAPR variation range is large in different cases, and in some cases PAPR bigger. The previously mentioned case means that the pilot subcarrier phase change corresponds to the first row in P-maxtrix, and the other subcarrier phase changes correspond to the corresponding row in the P-matrix with the spatial stream. These cases can be summarized into the following four cases: in the case where the pilot subcarrier does not change the phase and is fixed by '+1', the other subcarriers change the phase and are multiplied by '+1', '-1', respectively. w' or 'w ² ', where w=exp(-1i*2*pi/6).

For example, in the prior art scheme 1, the result of the PAPR is as follows, wherein the pilot subcarrier does not change the phase, and the fixed is multiplied by '+1', and the other subcarriers change the phase, and are respectively multiplied by '+1', '-1'. , 'w' or 'w ² ', the PAPR corresponding to each row is shown in Figure 6. It can be seen that the PAPR varies greatly, and some PAPRs have exceeded 7dB.

Some embodiments are provided below. The corresponding HE-LTF sequence has a lower PAPR when different values are set due to the pilot position.

In some preferred implementation manners, the hardware implementation can also achieve low storage capacity and easy implementation.

In one aspect, a method of transmitting an HE-LTF sequence is provided, comprising:

Obtaining a corresponding HE-LTF sequence according to the bandwidth, where the HE-LTF sequence is specifically a sequence in subsequent embodiments;

A sequence segment corresponding to the location of the HE-LTF sequence is transmitted according to the RU size and the RU location in the resource allocation information.

Referring to Figures 7a, 7b, a simplified schematic diagram of the above method in the up and down direction.

In order to make the above method clearer, the following describes the uplink and downlink transmission processes in detail:

Downstream transmission process:

The AP sends a data packet PPDU, where the PPDU can refer to the structure shown in FIG. 4, including:

101: The AP obtains a HE-LTF sequence corresponding to the bandwidth according to the total transmission bandwidth.

The HE-LTF sequence may be stored on the AP or may be constructed according to certain principles. For specific examples, reference may be made to subsequent examples.

102: Obtain a corresponding HE-LTF sequence segment from the HE-LTF sequence according to the resource block RU size and the RU location allocated by the scheduled user, and map the HE-LTF sequence segment to the allocated RU subcarrier position. Send it out.

In a preferred example, the PPDU includes multi-stream/multi-user transmission, and the HE-LTF needs to be transmitted on N symbols, where N should be greater than or equal to the maximum value M of the total number of streams corresponding to the allocated users on each RU. It is recorded as N>=M, where N=1, 2, 4, 6 or 8, and M=1 to 8. The AP allocates one row in the P-matrix matrix of size NxN to each stream on the RU as a signature for distinguishing the stream. Specifically, when transmitting the HE-LTF sequence of each stream on the RU, the tone plan on the nth symbol of the HE-LTF removes the length value other than the pilot subcarrier position, and multiplies the corresponding feature code used to distinguish the stream. The nth code word. It is known to those skilled in the art that the processing of the pilot subcarrier position is processed according to the prior art solution, and details are not described herein again.

A method for a downlink scheduled STA to receive an 802.11ax packet PPDU includes:

201: The scheduled STA receives the PPDU, and obtains the total transmission bandwidth indicated by the AP in the HE-SIG-A.

202: Obtain an HE-LTF sequence corresponding to the bandwidth according to the total transmission bandwidth.

The HE-LTF sequence may be stored on the AP or the STA, or may be constructed according to certain principles. For specific examples, reference may be made to subsequent embodiments.

203: The scheduled STA identifies its own scheduled indication information by using its own STA ID according to the HE-SIG-B in the PPDU, where the size of the RU allocated by the AP to the user and the location of the RU are obtained. Selecting, according to the indicated RU size and location, a corresponding HE-LTF sequence segment from the HE-LTF sequence corresponding to the total bandwidth of the transmission, as a channel estimation reference sequence corresponding to the RU of the receiving end, for performing subsequent channels. Estimated operation, the principle of which is not described here.

Uplink transmission process:

The uplink STA sends the 802.11ax packet PPDU. Referring to FIG. 4, the AP indicates the uplink scheduling information by using the trigger frame, including the uplink user STA transmission bandwidth, the uplink scheduled STA ID, and the RU size and location allocated for the STA. Or, uplink HE-LTF lengths aligned by multiple users. Wherein, the length of the HE-LTF is the number of symbols N, and the maximum value of the total number of streams corresponding to the allocated users on each RU is M, N>=M, N=1, 2, 4, 6 or 8, M=1 ~8.

When the uplink STA sends the PDU of the 802.11ax packet

301: The STA obtains an HE-LTF sequence corresponding to the bandwidth according to the indicated total bandwidth of the transmission.

The HE-LTF sequence may be stored on the AP or the STA, or may be constructed according to certain principles. For specific examples, reference may be made to subsequent embodiments.

302: The STA selects a HE-LTF sequence segment of the corresponding location from the HE-LTF sequence according to the allocated resource block RU size and the RU location, so that the mapping is sent out at the allocated RU subcarrier position.

303: Send N symbols according to the indicated HE-LTF length, wherein each symbol carries an HE-LTF.

Correspondingly, when the uplink AP receives the 802.11ax packet PPDU, the following:

401: The AP obtains a HE-LTF sequence corresponding to the bandwidth according to the total transmission bandwidth.

The HE-LTF sequence may be stored on the AP or may be constructed according to certain principles. For specific examples, reference may be made to subsequent embodiments.

402: The AP selects a corresponding HE-LTF sequence segment from the HE-LTF sequence according to the resource block RU size and the RU location allocated by each uplink scheduled user (station), and performs channel estimation as a reference sequence of the RU. .

Those skilled in the art will appreciate that 802.11ax compliant data packets may have transmission modes or data structures such as SU, MU, or OFDMA. The HE-LTF sequence proposed by the embodiments of the present invention is not limited to application to a specific data structure, but can be applied to transmission of various data packets conforming to the 802.11ax standard. For example, in the transmission mode of the SU, the resource block RU size and the RU location allocated for the site mentioned in the foregoing embodiments are the entire bandwidth used by the current transmission. This article will not go into details.

In an embodiment of the present invention, a method for constructing a HE-LTF sequence is provided, which can be applied to the foregoing embodiments, in particular, for the size and location of different resource blocks RU in the 802.11ax OFDMA tone plan:

501: Select one or a set of basic HE-LTF sequences of small RU lengths in an OFDMA subcarrier layout. Here, the small RU may refer to the aforementioned RU with a number of subcarriers of 26. For the 4x mode, the basic HE-LTF sequence is a subsequence of length 26, for the 2x mode, since the HE-LTF sequence number corresponds to the number of 4x HE-LTF numbers divided by 2, the basic HE-LTF sequence in 2x mode Is a subsequence of length 13.

502: repeat the basic HE-LTF sequence according to the size and location of different RUs in the OFDMA tone plan, or repeat one of the basic HE-LTF sequences, and perform +1 in units of the basic HE-LTF sequence. -1 phase rotation.

503: Cascading a number of basic HE-LTF sequences after phase rotation to construct an HE-LTF sequence for a large RU, and further according to the number and location of residual subcarriers between several small RUs corresponding to the large RU. Fill the corresponding position with +1 or -1.

504: Cascading from a small RU to a large RU within a transmission bandwidth, and selecting a PAPR optimal PAPR sequence of various RUs as a HE-LTF sequence corresponding to the bandwidth.

It should be noted that, for different bandwidths, the HE-LTF sequences constructed according to the foregoing methods may be separately stored in the AP and STA ends in the WLAN, so as to be directly used in the uplink and downlink transmission mentioned above.

A description of some more specific embodiments follows. In the foregoing embodiments, when a subcarrier mapping mode of different OFDMA is mentioned, a transmitter (AP or STA) transmits different HE-LTF sequences according to different bandwidth sizes, RU locations, and RU sizes. include:

601 selects one HE-LTF sequence according to the bandwidth, and the one HE-LTF sequence has two forms, which respectively correspond to the 2x and 4x modes in 802.11ax.

Preferably, the HE-LTF in the 2x mode includes: the sub-sequence Ga and the sub-sequence Gb, +1 or -1 at the position of the spare leftover subcarrier; the length of the Ga and Gb is +1 or -1 The sequence of 13. In the specific example, Ga and Gb are:

G _a ={+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1}

G _b ={+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1}

The HE-LTF in the 2x mode may also include a sequence generated according to Ga and Gb. Here we will refer to the sequence generated by Ga and Gb as a derivative sequence, including but not limited to:

The sequence obtained by inverting the phase at the pilot position of the Ga sequence can be expressed as

The sequence obtained by inverting the phase at the pilot position of the Gb sequence can be expressed as

The sequence obtained by inverting the phase on the subcarrier of the even sequence of the Ga sequence can be expressed as G _c .

A sequence obtained by inverting the phase of a value on a subcarrier of an even bit of the Gb sequence can be expressed as G _d .

以及，G_d序列导频位置上的值反转相位后得到的序列，可以表示为

In addition, a further sequence includes: a sequence obtained by inverting a phase at a pilot position of the G _c sequence, which can be expressed as

And the sequence obtained by inverting the phase at the pilot position of the G _d sequence can be expressed as

The above derived sequence can be generated by the following formula:

G _c =G _a ·*G _xp G _d =G _b ·*G _xp

Where G _ap = {+1, +1, -1, +1, +1, +1, +1, +1, +1, -1, +1, +1, +1}, meaning that The frequency position (ie, the subcarrier position with the number 3 and 10) is inverted.

G _bp ={+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1}, meaning at the pilot position (ie, the serial number is the 4th and 11th subcarrier positions) is inverted.

G _xp ={+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1}, meaning in the even position Inverted.

G_b，G_d，

具有如下的关系。It should be noted that the above G _a , G _c ,

G _b , G _d ,

Has the following relationship.

1. The PAPR value after the G _a sequence IFFT is equal to the PAPR value after the G _c sequence IFFT.

和

的导频位置上的值经过不同的相位变换后，IFFT后的最大的PAPR值是相同的。2. Sequences G _a , G _c ,

with

After the values at the pilot positions have undergone different phase changes, the maximum PAPR values after IFFT are the same.

3. G _b and its derived sequences are identical to G _a and its derived sequences, and have the same properties as described in 1, 2 above.

G_d替换为

替换为

替换为

其本质没有不同。或者，全部基础子序列以及相应的衍生序列有不同的表达方式。Those skilled in the art will appreciate that the aforementioned derived sequences may have different expressions, for example, the aforementioned G _{c is} replaced by

Replace G _d with

Replace with

Replace with

Its essence is no different. Alternatively, all of the basic subsequences and corresponding derived sequences have different expression patterns.

The HELTF in 4x mode includes: sequence Ga, subsequence Gb, and +1 or -1 at the position of the spare leftover subcarrier; the Ga or Gb is a sequence of length 26 consisting of +1 or -1. specific:

Ga=[+1 +1 +1 +1 +1 +1 -1 +1 +1 +1 -1 +1 +1 -1 -1 -1 +1 -1 +1 -1 -1 +1 +1 - 1 +1 -1];

Gb=[+1 +1 +1 +1 -1 -1 +1 +1 +1 +1 +1 -1 +1 +1 -1 -1 -1 +1 -1 -1 -1 +1 -1 + 1 -1 +1];

The HE-LTF in the 4x mode may also include a sequence generated according to Ga or Gb. Here we refer to the sequence generated by Ga or Gb as a derived sequence, including but not limited to:

The sequence obtained by inverting the phase at the pilot position of the Ga sequence can be recorded as

The sequence obtained by inverting the phase at the pilot position of the Gb sequence can be recorded as

A sequence obtained by inverting the phase of the value on the subcarrier of the even sequence of the Ga sequence can be referred to as G _c .

A sequence obtained by inverting the phase of a value on a subcarrier of an even bit of the Gb sequence can be referred to as G _d .

The sequence obtained by inverting the phase at the pilot position of the G _c sequence can be recorded as

The sequence obtained by inverting the phase at the pilot position of the G _d sequence can be recorded as

Wherein, the above derivative sequence can be generated by the following formula:

G _c =G _a ·*G _xp G _d =G _b ·*G _xp

among them,

G _ap = {1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,1,1,1} means at

The pilot position (ie, the subcarriers with the number 6 and 20) is inverted.

G _bp = {1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,1,1,1} means that the pilot position (ie, the subcarriers of the seventh and 21st numbers) is inverted.

G _xp ={+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1-1,+1,-1 , +1, -1, +1, -1, +1, -1, +1, -1, +1, -1} means negating the position of the even number.

G_b，G_d，

具有如下的关系。It should be noted that the above G _a , G _c ,

G _b , G _d ,

Has the following relationship.

1. The PAPR value after the G _a sequence IFFT is equal to the PAPR value after the G _c sequence IFFT.

和

的导频位置上的值经过不同的相位变换后，IFFT后的最大的PAPR值是相同的。2. Sequences G _a , G _c ,

with

After the values at the pilot positions have undergone different phase changes, the maximum PAPR values after IFFT are the same.

3, G _b and G _a sequence derived with the same sequence and its derivatives, having the same properties as described above 1,2.

G_d替换为

替换为

替换为

其本质没有不同。或者，全部基础子序列以及相应的衍生序列有不同的表达方式，其本质没有不同。Those skilled in the art will appreciate that each of the foregoing subsequences and derived sequences may have different expression patterns, for example, the aforementioned G _{c is} replaced by

Replace G _d with

Replace with

Replace with

Its essence is no different. Alternatively, all of the basic subsequences and the corresponding derived sequences have different expressions, and their nature is not different.

In a preferred embodiment, the HE-LTF sequence further comprises a combination of different derived sequences for different 2x/4x patterns.

Cascade combinations in the 2x mode include, but are not limited to, one or any combination of the following sequences for the Ga, Gb sequences, and the different derived sequences they generate:

The cascaded combination in the 4x mode includes, but is not limited to, one or any combination of the following sequences for the Ga, Gb sequences, and the different derived sequences they generate:

Of course, depending on the different expressions of the sequence, the above-mentioned cascade combination may also have corresponding different expressions, and the contents thereof are not substantially different.

It should be noted that, in the AP or the STA of the WLAN, only the sub-sequence Ga and the sub-sequence Gb may be stored, and when the PPDU needs to be transmitted, the HE-LTF sequence is constructed and then transmitted, or the foregoing HE-LTF sequence may be directly stored. In an AP or STA, it is transmitted on the corresponding subcarrier when needed.

602. Send the HE-LTF sequence according to the RU size and the RU location in the resource allocation information.

Specifically, referring to the tone plan of FIG. 1a, 1b, 1c, etc., the subsequences at corresponding positions of the HE-LTF sequence are placed on the subcarriers corresponding to the position and transmitted.

In the following, some more specific HE-LTF sequences are provided, all of which have the aforementioned lower PAPR characteristics.

Example one

In the 2x mode, there are 128 subcarriers on the 2x symbol of the 20MHz bandwidth. According to different resource block sizes, as shown in FIG. 1a, the RU size may be 13, 26, 54, and 121 subcarriers.

There are many kinds of HE-LTF sequences in the 2X mode for the 20MHz 121 subcarriers. Only the best ones are listed below:

Those skilled in the art know that -122:2:122 refers to a subcarrier of an even position in a subcarrier of sequence number -122 to 122, that is, specifically the sequence number is {-122, -120, ..., -2 For those carriers of 0, +2, ..., +120, +122}, the values at the positions of these subcarriers are the elements of the corresponding positions in the above sequence, and the values of the subcarriers at other positions are 0. The above expressions will not be described in the following.

G_c，

(具体内容参考前面的陈述)，位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连续的+G_a,

或者，连续的+G_b,

或者，连续的+G_c,

连续的

-G_b等。其中，G_a＝{+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1}The HE-LTF sequence includes Ga and Gb sequences and sequences generated by Ga and Gb sequences.

G _c ,

(Refer to the previous statement for details), +1 or -1 at the position of the spare leftover subcarrier, and further, may also contain consecutive +G _a ,

Or, continuous +G _b ,

Or, continuous +G _c ,

continuously

-G _b and so on. Where G _a ={+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1}

G _b ={+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1}

The details of the above sequence and the construction process refer to the description of the HE-LTF sequence in the previous 2x mode.

More specifically, the HE-LTF sequence on the above 2X mode can be directly stored as:

HELTF _2x (-122:2:122)=

[+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,+1,

-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,+1,-1,

-1,-1,+1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,

+1,0,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,+1,+1,+1,

-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,-1,-1,+1,-1,

-1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,

-1, +1, -1]

FIG. 8a shows the PAPR value of the HE-LTF sequence in the 20 MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The first set of PAPR values is the PAPR value corresponding to the 26 subcarrier resource blocks from left to right, wherein the first row of data 2.76, 3.68, 2.76, 3.68... refers to the value of the data position multiplied by +1, the pilot position The value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier from left to right. The resource block corresponds to the PAPR value, and so on; the second row data 3.67, 2.76, 3.68, 2.76... means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds to the PAPR value. , which is from left to right 3.68 is the first 26 subcarrier resource block corresponding PAPR value, the next 2.76 refers to the second 26 subcarrier resource block corresponding PAPR value from left to right, and so on; third row data 3.30, 4.46, 3.30, 4.46... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from the left to the right 3.30 is the first 26 sub- The carrier resource block corresponds to the PAPR value, and the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right. The fourth row of data 4.46, 3.30, 4.46, 3.30... means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is sequentially from left to right. The right 4.46 is the PAPR value corresponding to the first 26 subcarrier resource block, and the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;

The second group of PAPR values: from left to right, the PAPR value corresponding to the second row 52 subcarrier resource block, wherein the first row data 4.68, 4.68, 4.33, 4.68... means that the value of the data position is multiplied by +1. The value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left direction. The second 52 subcarrier resource block of the right corresponds to the PAPR value, and so on;

The second row of data 4.68, 4.68, 4.48, 4.68 refers to the value of the data position multiplied by -1, the value of the pilot position is multiplied by +1, the PAPR value corresponding to the HELTF sequence, which is from left to right, first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 4.69, 4.69, 4.35 4.69 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 4.69 is the first 52 subcarrier resource block. Corresponding to the PAPR value, the second 4.69 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right, and so on. The fourth row data 4.69, 4.69, 4.77, 4.69 refers to the value of the data position multiplied. The value of w ² , the location of the pilot is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, the first 4.69 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.69 is Refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;

The third group of PAPR values is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 4.89 and 3.93 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied. The PAPR value corresponding to the HELTF sequence at +1, which is from left to right in sequence, 4.89 is the corresponding PAPR value of the first 106 subcarrier resource block, and 3.93 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right. The second row of data 4.23, 4.76 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and 4.23 is the first 106. The subcarrier resource block corresponds to the PAPR value, 4.76 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right; the third row data 4.79, 4.73 means that the value of the data position is multiplied by w, and the value of the pilot position is The PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence, 4.79 is the corresponding PAPR value of the first 106 subcarrier resource block, and 4.73 refers to the second 106 subcarrier resource block corresponding to PAPR from left to right. value; 4.38,4.87 fourth line of data is the value of the position data are multiplied by w ^2, the value of the position of the pilot sequence is multiplied by +1 HELTF Corresponding PAPR value, sequentially from left to right, the first 4.38 106 corresponding to subcarrier resource block PAPR value 4.87 means 106 from left to right a second subcarrier resource block corresponding PAPR value.

The fourth group of data 5.31, 5.32, 5.48, 5.46 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 5.31 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.32 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 5.48 refers to the data position. The values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.46 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence.

The second HE-LTF sequence in 2x mode:

G_d，

位于空余leftover子载波位置上的+1或者-1。前述各序列的内容参考前面的实施方式，不再赘述。The HE-LTF sequence in the 2x mode includes a Ga sequence and a sequence G _c generated by the Ga and Gb sequences,

G _d ,

+1 or -1 at the position of the spare leftover subcarrier. The contents of the foregoing sequences refer to the previous embodiments and will not be described again.

或者，连续的+G_a,

(或者，如上述序列中列出的连续的-G_d,

或者，连续的+G_a,

连续的

+G_d。Further, it also includes a continuous -G _c ,

Or, continuous +G _a ,

(or, as the consecutive -G _d listed in the above sequence,

Or, continuous +G _a ,

continuously

+G _d .

Of course, the HE-LTF sequence in the aforementioned 2x mode can be directly stored as

HELTF _2x (-122:2:122)=

[+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,

-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,+1,-1,-1,

+1,-1,-1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,

+1,0,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,+1,

+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,-1,+1,+1,+1,

-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,

-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,-1]

The PAPR value using the above HE-LTF sequence is the same as that shown in Fig. 8a.

The third HE-LTF sequence in 2x mode:

G_d，

位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连续的+G_a,

或者，连续的

+G_d，或者，连续的-G_a，连续的

-G_b。各序列的具体内容参考前述实施方式，不再赘述。The HE-LTF sequence includes Ga and Gb sequences and sequences generated by Ga and Gb sequences.

G _d ,

+1 or -1 located at the position of the spare leftover subcarrier, further, may also contain a continuous +G _a ,

Or continuous

+G _d , or continuous -G _a , continuous

-G _b . The specific content of each sequence refers to the foregoing embodiment, and details are not described herein again.

The HE-LTF sequence in the aforementioned 2x mode can be directly stored as

HELTF _2x (-122:2:122)=

[+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,

-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,+1,-1,+1,+1,-1,

+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,

+1,0,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,

+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,

+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,

-1, +1, -1]

.

Figure 8b shows the PAPR value of the HE-LTF sequence in the 20MHz bandwidth. It can be seen from the set of PAPR values that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The first group of numbers is the PAPR value corresponding to the 26 subcarrier resource blocks from left to right, wherein the first row of data 2.76, 3.68, 2.76, 3.68... refers to the value of the data position multiplied by +1, the value of the pilot position The PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier resources from left to right. The block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76... is the value of the data position multiplied by -1, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, From left to right, 3.68 is the first 26 subcarrier resource block corresponding to the PAPR value, and the next 2.76 refers to the second 26 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 3.30, 4.46, 4.46, 3.30... The value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from the left to the right 3.30 is the first 26 subcarrier resource block. Corresponding to the PAPR value, the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource blocks from left to right. ; ...... 4.46,3.30,3.30,4.46 fourth line data is the value of the position data are multiplied by w ^2, pilot position values are multiplied by a value corresponding to PAPR HELTF sequence +1, which in turn is from left to right 4.46 The first 26 subcarrier resource block corresponds to the PAPR value, and the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;

The second group of numbers is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, wherein the first row data 4.68, 4.33, 4.68, 4.68 refers to the value of the data position multiplied by +1, the pilot position The values are multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right. The first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.33 refers to the second from left to right. 52 subcarrier resource blocks correspond to PAPR values, and so on;

The second row of data 4.68, 4.48, 4.68, 4.68 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is sequentially from left to right, first 4.48 is the corresponding 52PR carrier resource block corresponding PAPR value, the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 4.69, 4.35, 4.69 4.69 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 4.69 is the first 52 subcarrier resource block. Corresponding to the PAPR value, the second 4.35 refers to the PAPR value corresponding to the second 52 subcarrier resource block from left to right, and so on. The fourth row data 4.69, 4.77, 4.69, 4.69 refers to the value of the data position multiplied by w ² , the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right, the first 4.69 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.77 refers to The second 52 subcarrier resource block from left to right corresponds to the PAPR value, and so on;

The third group of data is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 3.93 and 4.89 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by The PAPR value corresponding to the HELTF sequence at +1, which is from left to right in sequence, 3.93 is the corresponding PAPR value of the first 106 subcarrier resource block, and 4.89 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right; The second row of data 4.76, 4.23 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is sequentially from left to right, and 4.76 is the first 106. The carrier resource block corresponds to the PAPR value, 4.23 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right; the third row data 4.73 and 4.79 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied. The PAPR value corresponding to the HELTF sequence at +1, which is from left to right in sequence, 4.73 is the corresponding PAPR value of the first 106 subcarrier resource block, and 4.79 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right. The fourth row of data 4.87, 4.38 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1 when the HELTF sequence Corresponding PAPR values, which are sequentially from left to right, 4.87 is the corresponding 106-subcarrier resource block corresponding to the PAPR value, and 4.38 refers to the corresponding 106-hop PAPR value from the left to the right of the 106-subcarrier resource block.

The fourth group of data 5.31, 5.32, 5.48, 5.46 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 5.31 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.32 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 5.48 refers to the data position. The values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.46 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence.

The HE-LTF sequence in the fourth 2x mode:

G_d，位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连续的-G_c,

或者，连续的

+G_b，或者，连续的

+G_c，连续的

+G_d。The HE-LTF sequence includes a Gb sequence and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier, and further, may also include a continuous -G _c ,

Or continuous

+G _b , or continuous

+G _c , continuous

+G _d .

In addition to other sequence expressions

It can also be stored directly as:

HELTF _2x (-122:2:122)=

[+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,

-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,+1,+1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,

+1,0,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,

-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,+1,+1,+1,-1,+1,

+1, +1, +1, -1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, +1,

-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,-1]

.

The PAPR value of the above HE-LTF sequence is the same as that shown in FIG. 8b, and will not be described again here.

Example two

There are 512 subcarriers on the 2x symbol of 40MHz bandwidth, according to different resource block sizes, as shown in Figure 1b. The illustrated RU size may be 26, 52, 106, 242, 484 subcarriers.

There are many HE-LTF sequences in the 40MHz 484 subcarrier 2X mode. Only a few of them are listed below:

The first HE-LTF sequence in 40MHz 2X mode:

G_d，位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含：连续的-G_c,

或者，连续的-G_a,

或者，连续的+G_a,

或者，连续的

-G_c，或者，连续的+G_d,

或者，连续的

-G_d，或者，连续的

-G_b，或者，连续的

+G_b，或者，连续的

-G_d。上述序列的内容可以参考前述40MHz带宽2x 符号上的各序列。The HE-LTF sequence includes a Ga and Gb sequence and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier, and further, may further include: continuous -G _c ,

Or, continuous -G _a ,

Or, continuous +G _a ,

Or continuous

-G _c , or continuous +G _d ,

Or continuous

-G _d , or continuous

-G _b , or continuous

+G _b , or continuous

-G _d . For the content of the above sequence, reference may be made to each sequence on the aforementioned 40 MHz bandwidth 2x symbol.

In addition to the above expressions, there may be other expressions, which can also be directly stored as

HELTF _2x (-244:2:244)=

[+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,

+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,

+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,

-1,+1,-1,-1,+1,-1,+1,+1,-1,-1,+1,+1,+1,-1,+1,

+1,-1,+1,-1,+1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,

-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,

+1,0,0,0,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,

+1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,-1,

-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,

-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,

-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,

-1, +1, +1, +1, +1]

.

Those skilled in the art will appreciate that the above sequence should be briefly expressed by the aforementioned expression:

Figure 9 shows the PAPR value of the HE-LTF sequence in the 40MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The first group of numbers is the PAPR value corresponding to the 26 subcarrier resource blocks from left to right, wherein the first row of data 2.76, 3.68, 2.76, 3.68... refers to the value of the data position multiplied by +1, the value of the pilot position The PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier resources from left to right. The block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76... is the value of the data position multiplied by -1, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, From left to right, 3.68 is the first 26 subcarrier resource block corresponding to the PAPR value, and the next 2.76 refers to the second 26 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 3.30, 4.46, 3.30, 4.46... The value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from the left to the right 3.30 is the first 26 subcarrier resource block. Corresponding to the PAPR value, the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource blocks from left to right. ; ...... 4.46,3.30,4.46,3.30 fourth line data is the value of the position data are multiplied by w ^2, pilot position values are multiplied by a value corresponding to PAPR HELTF sequence +1, which in turn is from left to right 4.46 The first 26 subcarrier resource block corresponds to the PAPR value, and the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;

The second group of numbers is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, wherein the first row data 4.68, 4.68, 4.34, 4.48... means that the value of the data position is multiplied by +1, pilot The value of the position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left to the right. The second 52 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.68, 4.68, 4.48, 4.34... means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block corresponding from left to right. PAPR value, and so on; third line data 4.69, 4.69, 4.35, 4.77... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is sequentially Left to right, the first 4.69 is the first 52 subcarrier resource block corresponding to the PAPR value, and the second 4.69 is the second 52 from left to right. The carrier resource block corresponds to the PAPR value, and so on; wherein the fourth row of data 4.69, 4.69, 4.77, 4.35 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds to the PAPR value. , which is from left to right in sequence, the first 4.69 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.69 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;

The third group of data is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 5.42, 4.34, 4.34, 5.42 means that the value of the data position is multiplied by +1, the pilot position The values are multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right, 5.42 is the corresponding 106PR carrier resource block corresponding PAPR value, and 4.34 refers to the second 106 subcarrier resource block from left to right. Corresponding to the PAPR value, and so on; the second row of data 4.85, 5.50, 5.50, 4.85 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, which in turn From left to right, 4.85 is the PAPR value corresponding to the first 106 subcarrier resource block, 5.50 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right, and so on; the third row data is 4.94, 4.63, 4.63, 4.94 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is sequentially from left to right, and 4.94 is the corresponding PAPR value of the first 106 subcarrier resource block. 4.63 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right, and so on; the fourth row of data 4.6 8. 5.16, 5.16, 4.68 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and 4.68 is the first 106. The carrier resource block corresponds to the PAPR value, and 5.16 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.

The fourth group of data is the PAPR value corresponding to the third row 242 subcarrier resource block from left to right, wherein the first row data 5.32 and 5.32 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by The PALTF sequence corresponding to the HELTF sequence, which is from left to right, the first 5.32 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.32 refers to the second 242 subcarrier from left to right. The resource block corresponds to the PAPR value; the second row data 5.37 and 5.37 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1, and the PAPR value corresponding to the HELTF sequence is sequentially from left to right. A 5.37 is the first 242 subcarrier resource block corresponding PAPR value, the second 5.37 refers to the second 242 subcarrier resource block corresponding to the PAPR value from left to right; the third row data 5.50, 5.50 refers to the data position The values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is from left to right, the first 5.50 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.50 means that the second 242 subcarrier resource block from left to right corresponds to the PAPR value; the fourth row data 5.39, 5.39 refers to the value of the data position. PAPR sequence of values corresponding to time HELTF w ^2, pilot position values are multiplied by +1 sequentially from left to right, the first 5.39 242 is the first subcarrier resource block corresponding PAPR value is 5.39 second Refers to the second 242 subcarrier resource block from left to right corresponding to the PAPR value;

The fifth group of data 6.00, 4.98, 6.15, 5.26 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 6.00 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 4.98 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 6.15 refers to the data position. The values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.26 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence.

The second HE-LTF sequence in 40MHz 2x mode:

G_d，位于空余leftover子载波位置上的+1或者-1，The HE-LTF sequence includes a Ga and Gb sequence and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier,

或者，连续的-G_c,

或者，连续的+G_c,

或者，连续的

-G_a，或者，连续的+G_b,

或者，连续的

-G_d，或者，连续的+G_d，或者，连续的

+G_b。Further, it may contain continuous +G _a ,

Or, continuous -G _c ,

Or, continuous +G _c ,

Or continuous

-G _a , or, continuous +G _b ,

Or continuous

-G _d , or continuous +G _d , or continuous

+G _b .

Similarly, it can be stored directly as

HELTF _2x (-244:2:244)=

[+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,

-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,

+1,+1,+1,-1,-1,-1,-1,+1,+1,-1,-1,+1,-1,-1,-1,

+1,+1,+1,+1,+1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,

+1,0,0,0,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,

+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,

+1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,-1,

+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,

-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,

+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,

+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,

-1,-1,+1,-1,+1]

.

Those skilled in the art will appreciate that the above sequence should be briefly expressed by the aforementioned expression:

The PAPR value when the above HE-LTF sequence is used is the same as that shown in FIG. 9, and will not be described again.

Example three

There are 256 subcarriers on the 2x symbol of the 80MHz bandwidth. According to different resource block sizes, as shown in FIG. 1c, the RU size may be 26, 52, 106, 242, 484, 996 subcarriers.

There are many HE-LTF sequences on the 2X symbol of the 80MHz 996 subcarrier. Some of the following are listed:

The first 80MHz 2X HE-LTF sequence:

G_c，

G_d，

位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连续的-G_a,

或者，连续的+G_c,

+G_b，或者，连续的

-G_a，或者，连续的

-G_c，或者，连续的-G_c,

或者，连续的-G_a,

-G_d，或者，连续的

-G_c，或者，连续的

+G_a，连续的+G_d,

或者，连续的-G_b,

或者，连续的-G_a,

-G_d，或者，连续的-G_a,

-G_d，或者，连续的

-G_b，或者，连续的G_b,

或者，连续的+G_d,

或者，连续的-G_c,

-G_b，或者，连续的

+G_d。The HE-LTF sequence includes G _a and G _b sequences and sequences generated by the G _a and G _b sequences

G _c ,

G _d ,

+1 or -1 at the position of the spare leftover subcarrier, further, may also contain consecutive -G _a ,

Or, continuous +G _c ,

+G _b , or continuous

-G _a , or, continuous

-G _c , or, continuous -G _c ,

Or, continuous -G _a ,

-G _d , or continuous

-G _c , or continuous

+G _a , continuous +G _d ,

Or, continuous -G _b ,

Or, continuous -G _a ,

-G _d , or, continuous -G _a ,

-G _d , or continuous

-G _b , or continuous G _b ,

Or, continuous +G _d ,

Or, continuous -G _c ,

-G _b , or continuous

+G _d .

Of course, it can also be stored as:

HELTF _2x (-500:2:500)=

[+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,

+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,

+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,

-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,

+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,

-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,

-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,+1,

-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,

-1,-1,+1,+1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,

-1,+1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,

+1,-1,+1,+1,-1,+1,+1,-1,+1,0,0,0,+1,+1,-1,

-1,+1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,

+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,

-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,

-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,

-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,

+1,+1,-1,+1,+1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,

-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,

+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,

+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,

+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,

-1, +1, -1, -1, -1, +1]

Those skilled in the art will appreciate that the above sequence should be briefly expressed by the aforementioned expression:

Figure 10 shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The first group of numbers: from left to right is the PAPR value corresponding to the 26 subcarrier resource blocks, wherein the first row of data 2.76, 3.68, 2.76, 3.68... means that the value of the data position is multiplied by +1, the position of the pilot The value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier from left to right. The resource block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76... is the value of the data position multiplied by +1, and the value of the pilot position is multiplied by -1 to the PAPR value corresponding to the HELTF sequence. It is from the left to the right 3.68 is the first 26 subcarrier resource block corresponding to the PAPR value, the next 2.76 refers to the second 26 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 3.30 4.46, 3.30, 4.46... The value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is the first 26 subcarrier resources from left to right. The block corresponds to the PAPR value, and the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right. Push; 4.46,3.30,4.46,3.30 ...... fourth line data is the value of the position data are multiplied by w ^2, are multiplied by the value of PAPR of the pilot the position corresponding to the time sequence of values +1 HELTF, sequentially from left to right 4.46 The first 26 subcarrier resource block corresponds to the PAPR value, and the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;

The second group of numbers is the PAPR value corresponding to the second row 52 subcarrier resource block from left to right, wherein the first row data 4.68, 4.68, 4.69, 4.69... means that the value of the data position is multiplied by +1, pilot The value of the position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left to the right. The second 52 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.68, 4.68, 4.69, 4.69... means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block corresponding from left to right. The PAPR value, and so on; the third row of data 4.68, 4.68, 4.69, 4.69... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, which in turn Left to right, the first 4.68 is the first 52 subcarrier resource block corresponding PAPR value, the second 4.68 refers to the second 52 from left to right Carrier PAPR value corresponding to the resource blocks, and so on; 4.68,4.68,4.69,4.69 wherein the fourth row of data refers to the sequence corresponding to the PAPR value HELTF position value data are multiplied by w ^2, pilot position values are multiplied by +1 , which is from left to right in sequence, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on.

The third group of data is the PAPR value corresponding to the third row 106 subcarrier resource block from left to right, wherein the first row data 5.42, 5.33, 5.42, 5.33... refers to the value of the data position multiplied by +1. The value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence in the HELTF sequence when the HELTF sequence is +1, which is from left to right in sequence, 5.42 is the PAPR value corresponding to the first 106 subcarrier resource block, and 5.33 is from left to right. The right second 106 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.85, 5.41, 4.85, 5.41... means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence in the HELTF sequence is from left to right, 4.85 is the PAPR value corresponding to the first 106 subcarrier resource block, and 5.50 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right. , and so on; the third row of data 4.95, 5.18, 4.95, 5.18... refers to the value of the data position multiplied by w, the value of the pilot position is multiplied by +1, the PAPR value corresponding to the HELTF sequence in the HELTF sequence, which in turn From left to right 4.95 is the first 106 subcarrier resource block corresponding PAPR value, 5.18 refers to the second from left to right 106 subcarrier resource blocks correspond to PAPR values, and so on; fourth row data 4.68, 4.97, 4.68, 4.97... means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1 when the HELTF sequence The PAPR value corresponding to the HELTF sequence is from left to right, 4.68 is the PAPR value corresponding to the first 106 subcarrier resource block, and 4.97 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.

The fourth group of data is the PAPR value corresponding to the fourth row 242 subcarrier resource block from left to right, wherein the first row data 5.29 and 5.29 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by The PALTF value corresponding to the HELTF sequence at +1 +1 is from left to right, the first 5.29 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.29 is the second from left to right. The 242 subcarrier resource block corresponds to the PAPR value; the second row data 5.58 and 5.58 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1, and the PAPR value corresponding to the HELTF sequence in the HELTF sequence is sequentially From left to right, the first 5.58 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.58 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right; the third row data is 5.40, 5.40 means that the value of the data position is multiplied by w, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is sequentially from left to right, and the first 5.40 is the first 242 subcarrier resource block corresponding to PAPR value, the second 5.40 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right; the fourth row data 5.46, 5 .46 means that the value of the data position is multiplied by w ² , the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 5.46 is the first 242 subcarrier resource. The block corresponds to the PAPR value, and the second 5.46 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right;

The fifth group of data is the PAPR value corresponding to the fifth row 484 subcarrier resource block from left to right, wherein the first row data 6.27, 6.13 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock is from left to right, 6.27 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.13 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right; The two rows of data 6.11 and 6.40 mean that the values of the data positions are multiplied by -1, and the values of the pilot positions are multiplied by +1. The PAPR values corresponding to the HELTF sequence in the HELTF sequence are sequentially left to right, and 6.11 is the first The 242 subcarrier resource block corresponds to the PAPR value, 6.40 refers to the PAPR value corresponding to the second 484 subcarrier resource block from left to right; the third row data 6.24, 6.34 refers to the value of the data position multiplied by w, the value of the pilot position. The PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence, 6.24 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.34 refers to the second 484 subcarrier resource block corresponding from left to right. PAPR value; the fourth row data 6.29, 6.25 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is from left to right in sequence, 6.29 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.25 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right;

The sixth group of data 6.01, 5.68, 6.08, 5.92 is the PAPR value corresponding to the sixth row 996 subcarrier resource block, wherein the first 6.08 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.68 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 6.08 refers to the data position. The values are multiplied by w, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the fourth 5.92 is that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence.

The second 80MHz 2X HE-LTF sequence:

G_c，

G_d，

位于，位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连续的+G_c,

或者，连续的+G_a,

+G_d，或者，连续的

+G_c，或者，连续的

-G_a，或者，连续的-G_a,

或者，连续的+G_c,

+G_b，或者，连续的

-G_a，或者，连续的

-G_c，连续的-G_b,

或者，连续的-G_d,

或者，连续的+G_c,

+G_b，或者，连续的

-G_d，或者，连续的+G_d,

或者，连续的-G_b,

或者，连续的-G_a,

-G_d，或者，连续的

-G_b。The HE-LTF sequence includes G _a and G _b sequences and sequences generated by the G _a and G _b sequences

G _c ,

G _d ,

Located at +1 or -1 at the position of the spare leftover subcarrier, further, may also contain consecutive +G _c ,

Or, continuous +G _a ,

+G _d , or continuous

+G _c , or continuous

-G _a , or, continuous -G _a ,

Or, continuous +G _c ,

+G _b , or continuous

-G _a , or, continuous

-G _c , continuous -G _b ,

Or, continuous -G _d ,

Or, continuous +G _c ,

+G _b , or continuous

-G _d , or continuous +G _d ,

Or, continuous -G _b ,

Or, continuous -G _a ,

-G _d , or continuous

-G _b .

It can also be stored directly as:

HELTF _2x (-500:2:500)=

[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,

-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,

+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,

+1,-1,-1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,

+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,

-1,+1,+1,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,

+1,+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,

+1, +1, +1, -1, -1, -1, +1, +1, +1, 0, 0, 0, +1, -1, -1,

+1,+1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,

-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,

-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,

-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,

-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,

-1,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,

-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,

+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,

-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,

+1, +1, +1, -1, +1, +1]

After the second HELTF sequence is used, the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence (shown in Figure 10).

The third 80MHz 2X HE-LTF sequence:

G_c，

G_d，

位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连 续的-G_a,

或者，连续的+G_c,

+G_b，或者，连续的

-G_a，或者，连续的

-G_c，或者，连续的+G_c,

或者，连续的+G_a,

+G_d，或者，连续的

+G_c，或者，连续的

-G_a，连续的-G_d,

或者，连续的+G_b,

或者，连续的+G_a,

或者，连续的+G_a,

+G_d，或者，连续的

+G_b，或者，连续的+G_b,

或者，连续的+G_d,

或者，连续的-G_c,

-G_b，或者，连续的

+G_d。The HE-LTF sequence includes G _a and G _b sequences and sequences generated by the G _a and G _b sequences

G _c ,

G _d ,

+1 or -1 at the position of the spare leftover subcarrier, further, may also include a continuous -G _a ,

Or, continuous +G _c ,

+G _b , or continuous

-G _a , or, continuous

-G _c , or continuous +G _c ,

Or, continuous +G _a ,

+G _d , or continuous

+G _c , or continuous

-G _a , continuous -G _d ,

Or, continuous +G _b ,

Or, continuous +G _a ,

Or, continuous +G _a ,

+G _d , or continuous

+G _b , or continuous +G _b ,

Or, continuous +G _d ,

Or, continuous -G _c ,

-G _b , or continuous

+G _d .

It is also possible to store the following sequences directly:

HELTF _2x (-500:2:500)=

[+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,

+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,

+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,

-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,

+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,

+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,

+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,

+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,

+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,

+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,

+1, +1, +1, -1, -1, -1, -1, +1, -1, +1, +1, +1, -1, +1, +1,

+1,+1,-1,-1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,

+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,

-1,+1,+1,+1,+1,-1,-1,+1,+1,0,0,0,+1,-1,+1,

+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,

+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,

-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,

+1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1,

+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,

+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,

+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,

-1,-1,+1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,

-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,

+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,

+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,

+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,

-1, +1, -1, -1, -1, +1].

Figure 11 shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The first group of numbers: from left to right is the PAPR value corresponding to the 26 subcarrier resource blocks, wherein the first row of data 2.76, 3.68, 2.76, 3.68... means that the value of the data position is multiplied by +1, the position of the pilot The value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right 2.76 is the first 26 subcarrier resource block corresponding PAPR value, and the next 3.68 refers to the second 26 subcarrier from left to right. The resource block corresponds to the PAPR value, and so on; the second row of data 3.68, 2.76, 3.68, 2.76... is the value of the data position multiplied by +1, and the value of the pilot position is multiplied by -1 to the PAPR value corresponding to the HELTF sequence. It is from the left to the right 3.68 is the first 26 subcarrier resource block corresponding to the PAPR value, the next 2.76 refers to the second 26 subcarrier resource block corresponding to the PAPR value from left to right, and so on; the third row of data 3.30 4.46, 3.30, 4.46... The value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is the first 26 subcarrier resources from left to right. The block corresponds to the PAPR value, and the next 4.46 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right. Push; 4.46,3.30,4.46,3.30 ...... fourth line data is the value of the position data are multiplied by w ^2, are multiplied by the value of PAPR of the pilot the position corresponding to the time sequence of values +1 HELTF, sequentially from left to right 4.46 The first 26 subcarrier resource block corresponds to the PAPR value, and the next 3.30 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;

The second group of numbers: from left to right is the PAPR value corresponding to the second row 52 subcarrier resource block, wherein the first row of data 4.68, 4.68, 4.69, 4.69, ... means that the value of the data position is multiplied by +1. The value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1, which is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the left direction. The second 52 subcarrier resource block corresponds to the PAPR value, and so on; the second row data 4.68, 4.68, 4.69, 4.69... means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is from left to right, the first 4.68 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block from left to right. Corresponding to the PAPR value, and so on; the third row of data 4.68, 4.68, 4.69, 4.69... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PALTF value corresponding to the HELTF sequence, which in turn From left to right, the first 4.68 is the first 52 subcarrier resource block corresponding to the PAPR value, and the second 4.68 refers to the second 52 from left to right. The subcarrier resource block corresponds to the PAPR value, and so on; wherein the fourth row data 4.68, 4.68, 4.69, 4.69 refers to the value of the data position multiplied by w ² , and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds to the PAPR The value, which is from left to right in sequence, the first 4.68 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.68 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on. ;

The third group of data: from left to right is the PAPR value corresponding to the third row 106 subcarrier resource block, wherein the first row data 5.42, 5.33, 5.42, 5.33... refers to the value of the data position multiplied by +1. The value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence in the HELTF sequence when the HELTF sequence is +1, which is from left to right in sequence, 5.42 is the PAPR value corresponding to the first 106 subcarrier resource block, and 5.33 is from the left. The second 106 subcarrier resource block to the right corresponds to the PAPR value, and so on; the second row data 4.85, 5.41, 4.85, 5.41... means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by + The PALTF sequence corresponds to the PAPR value of the HELTF sequence, which is from left to right, 4.85 is the corresponding 106-subcarrier resource block corresponding to the PAPR value, and 5.50 refers to the second 106 subcarrier resource block corresponding to the PAPR from left to right. Value, and so on; third line data 4.95, 5.18, 4.95, 5.18... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence in the HELTF sequence is From left to right, 4.95 is the first 106 subcarrier resource block corresponding to the PAPR value, and 5.18 means from left to right. The two 106 subcarrier resource blocks correspond to the PAPR value, and so on; the fourth row data 4.68, 4.97, 4.68, 4.97... means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1 when HELTF The PAPR value corresponding to the HELTF sequence in the sequence is from left to right, 4.68 is the PAPR value corresponding to the first 106 subcarrier resource block, and 4.97 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.

The fourth set of data:

From left to right, the PAPR value corresponding to the fourth row 242 subcarrier resource block is sequentially, wherein the first row data 5.29 and 5.29 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by +1 when HELTF The PAPR value corresponding to the HELTF sequence in the sequence is from left to right, the first 5.29 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.29 refers to the second 242 subcarrier resource from left to right. The block corresponds to the PAPR value; the second row data 5.58 and 5.58 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence in the HELTF sequence is sequentially from left to right. The first 5.58 is the PAPR value corresponding to the first 242 subcarrier resource block, and the second 5.58 refers to the corresponding PAPR value of the second 242 subcarrier resource block from left to right; the third row data 5.40, 5.40 refers to data The value of the position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when it is +1, which is sequentially from left to right, and the first 5.40 is the PAPR value corresponding to the first 242 subcarrier resource block, Two 5.40 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right; the fourth row data 5.46, 5.46 refers to the data bit. The values are multiplied by w ² , and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right, and the first 5.46 is the PAPR value corresponding to the first 242 subcarrier resource block. The second 5.46 refers to the PAPR value corresponding to the second 242 subcarrier resource block from left to right;

The fifth group of data is the PAPR value corresponding to the fifth row 484 subcarrier resource block from left to right, wherein the first row data 6.13, 6.27 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock, which is from left to right in sequence, 6.13 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.27 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right; The two rows of data 6.40 and 6.11 mean that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence in the HELTF sequence is sequentially from left to right, and 6.40 is the first The 242 subcarrier resource block corresponds to the PAPR value, 6.11 refers to the PAPR value corresponding to the second 484 subcarrier resource block from left to right; the third row data 6.34, 6.24 refers to the value of the data position multiplied by w, the value of the pilot position. The PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence, 6.34 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.24 refers to the second 484 subcarrier resource block corresponding from left to right. PAPR value; the fourth row of data 6.25, 6.29 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is from left to right in sequence, 6.25 is the corresponding PAPR value of the first 484 subcarrier resource block, and 6.29 refers to the corresponding PAPR value of the second 484 subcarrier resource block from left to right.

The sixth group of data 6.01, 5.68, 6.08, 5.92 is the PAPR value corresponding to the sixth row 996 subcarrier resource block, wherein the first 6.08 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.68 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 6.08 refers to the data position. The values are multiplied by w, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the fourth 5.92 is that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence.

The fourth HE-LTF sequence in 80MHz 2x mode:

G_c，

G_d，

位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包括连续的+G_c,

或者，连续的+G_a,

+G_d，或者，连续的

+G_c，或者，连续的

-G_a或者，连续的+G_a

或者，连续的-G_c,

-G_b，或者，连续的

+G_a，或者，连续的

+G_c，或者，连续的+G_b,

或者，连续的+G_d,

或者，连续的-G_c,

-G_b，或者，连续的

+G_d，或者，连续的+G_d,

或者，连续的-G_b,

或者，连续的-G_a,

-G_d，或者，连续的

-G_b。The HE-LTF sequence includes G _a and G _b sequences and sequences generated by the G _a and G _b sequences

G _c ,

G _d ,

+1 or -1 at the position of the spare leftover subcarrier, further, may also include a continuous +G _c ,

Or, continuous +G _a ,

+G _d , or continuous

+G _c , or continuous

-G _a or, continuous +G _a

Or, continuous -G _c ,

-G _b , or continuous

+G _a , or, continuous

+G _c , or continuous +G _b ,

Or, continuous +G _d ,

Or, continuous -G _c ,

-G _b , or continuous

+G _d , or, continuous +G _d ,

Or, continuous -G _b ,

Or, continuous -G _a ,

-G _d , or continuous

-G _b .

HELTF _2x (-500:2:500)=

[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,

-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,

+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,

+1,-1,-1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,

+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,

-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,

+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,

+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,-1,

-1,+1,-1,-1,+1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,

+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,

-1,-1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,

-1,-1,+1,-1,+1,+1,-1,-1,+1,0,0,0,+1,+1,+1,

-1,-1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,

+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,

+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,

+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,

+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,

+1,-1,-1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,

-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,

+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,

-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,

+1, +1, +1, -1, +1, +1].

After the fourth HELTF sequence is used, the corresponding PAPR value is the same as the PAPR value of the third HELTF sequence. See Figure 11 for details. It can be seen from the PAPR value of the group that when the pilot subcarrier and other subcarriers are introduced differently. When rotating the phase, the PAPR value is still very low.

Example four

In the 4x mode, there are 256 subcarriers on the 4x symbol of the 20MHz bandwidth. According to different resource block sizes, the RU size shown in FIG. 1a may be 26, 52, 106, 242 subcarriers.

There are many HE-LTF sequences for the 4X mode on the 20MHz 242 subcarriers. Only a few of them are listed below:

The first 20MHz 242 subcarrier 4X mode HE-LTF sequence

Where G _e ={1,-1,1,-1,1,1,1,1,-1,-1,-1,1,1,1,1,1,1,1,1,-1 ,1,-1,-1,1,1,-1}

G_d、

位于空余leftover子载波位置上的+1或者-1，进一步的，还可以包含连续的-G_c,

或者，连续的+G_d,

或者，连续的-G_c,

连续的+G_d,

The HE-LTF sequence comprising the sequence G _e and Ga and Gb generated sequence derived sequences G _c,

G _d ,

-1 or +1 is located on leftover spare sub-carrier position, further, it may further contain consecutive -G _c,

Or, continuous +G _d ,

Or, continuous -G _c ,

Continuous +G _d ,

It can also be stored directly as:

HELTF _4x (-122:122)=

[+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,

+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,

+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,

-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,-1,+1,-1,-1,+1,

+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,

+1,+1,-1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,

-1,0,0,0,+1,-1,+1,+1,+1,+1,+1,+1,-1,+1,-1,

-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,

+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,

+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,

+1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, +1, +1, -1, +1,

-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,

-1,+1,-1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,-1,

-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,

-1, -1, -1, -1, +1].

Figure 12 shows the PAPR value of the HE-LTF sequence in the 20MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The first group of numbers: from left to right is the PAPR value corresponding to the 26 subcarrier resource blocks, wherein the first row data 3.51, 3.78, 3.51, 3.78... refers to the value of the data position multiplied by +1, the pilot position The value is multiplied by the PAPR value corresponding to the HELTF sequence when +1, which is from left to right, 3.51 is the corresponding 26PR carrier resource block corresponding PAPR value, and the next 3.78 refers to the second 26 subcarrier from left to right. The resource block corresponds to the PAPR value, and so on; the second row data 3.78, 3.51, 3.78, 3.51... refers to the value of the data position multiplied by -1, and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds to the PAPR value. , which is from left to right 3.78 is the first 26 subcarrier resource block corresponding PAPR value, the next 3.51 refers to the second 26 subcarrier resource block corresponding to PAPR value from left to right, and so on; third row data 3.28, 3.48, 3.28, 3.48... means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by the PAPR value of the HELTF sequence when it is +1, which is the first 26 from the left to the right. The carrier resource block corresponds to the PAPR value, and the next 3.48 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right. Times on; 3.48,3.28,3.48,3.28 ...... fourth line data refers PAPR value sequence corresponding to the value of the data position when HELTF are multiplied by w ^2, pilot position values are multiplied by +1 sequentially from left to The right 3.48 is the PAPR value corresponding to the first 26 subcarrier resource block, and the next 3.28 refers to the PAPR value corresponding to the second 26 subcarrier resource block from left to right, and so on;

The second group of numbers: from left to right is the PAPR value corresponding to the second row 52 subcarrier resource block, wherein the first row data 4.42, 4.59, 4.63, 4.42 means that the value of the data position is multiplied by +1, the pilot position The values are multiplied by the PAPR value corresponding to the HELTF sequence, which is from left to right. The first 4.42 is the corresponding 52PR carrier resource block corresponding PAPR value, and the second 4.59 refers to the left to right. The two 52 subcarrier resource blocks correspond to the PAPR value, and so on; the second row data 4.42, 4.63, 4.59, 4.42 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by +1 when the HELTF sequence corresponds. The PAPR value is from left to right, the first 4.42 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.63 is the second 52 subcarrier resource block corresponding to the PAPR value from left to right. And so on; the third row of data 4.44, 4.86, 4.97, 4.42 means that the value of the data position is multiplied by w, and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence is sequentially from left to right. One 4.44 is the first 52 subcarrier resource block corresponding to the PAPR value, and the second 4.86 is the second 52 subcarrier resource from left to right. The corresponding PAPR value, and so on; 4.42,4.97,4.86,4.44 wherein the fourth row of data is pointed position data values are multiplied by w ^2, are multiplied by the value of the position HELTF pilot sequence corresponding PAPR value +1 which From left to right, the first 4.42 is the corresponding 52PR carrier resource block corresponding to the PAPR value, and the second 4.97 refers to the second 52 subcarrier resource block corresponding to the PAPR value from left to right, and so on;

The third group of data: from left to right is the PAPR value corresponding to the third row 106 subcarrier resource block, wherein the first row data 4.65, 4.90 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied. The PAPR value corresponding to the HELTF sequence at +1, which is from left to right in sequence, 4.65 is the corresponding PAPR value of the first 106 subcarrier resource block, and 4.90 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right. The second line of data 4.69, 5.01 means that the value of the data position is multiplied by -1, and the value of the pilot position is multiplied by the PAPR value of the HELTF sequence when it is +1, which is from left to right, and 4.69 is the first 106. The subcarrier resource block corresponds to the PAPR value, and 5.01 refers to the PAPR value corresponding to the second 106 subcarrier resource block from left to right; the third row data 4.90 and 4.95 means that the value of the data position is multiplied by w, and the value of the pilot position is The PAPR value corresponding to the HELTF sequence is multiplied by +1, which is from left to right in sequence, 4.90 is the corresponding PAPR value of the first 106 subcarrier resource block, and 4.95 refers to the second 106 subcarrier resource block corresponding to PAPR from left to right. Value; the fourth row of data 4.92, 4.87 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1 when the HELTF sequence The PAPR value corresponding to the column is from left to right in sequence, 4.92 is the PAPR value corresponding to the first 106 subcarrier resource block, and 4.87 refers to the corresponding PAPR value of the second 106 subcarrier resource block from left to right.

The fourth group of data 5.26, 5.30, 5.29, 5.56 is the PAPR value corresponding to the fourth row 242 subcarrier resource block, wherein the first 5.26 means that the value of the data position is multiplied by +1, and the value of the pilot position is multiplied by + The PAPR value corresponding to the HELTF sequence at 1 o'clock; the second 5.30 means that the value of the data position is multiplied by -1, the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence when +1; the third 5.29 refers to the data position. The values are multiplied by w, and the value of the pilot position is multiplied by the PAPR value corresponding to the HELTF sequence at +1; the first 5.56 means that the value of the data position is multiplied by w ² , and the value of the pilot position is multiplied by +1. The PAPR value corresponding to the HELTF sequence.

The second 20MHz 242 subcarrier 4X mode HE-LTF sequence:

Where G _e ={1,1,1,1,1,-1,1,-1,-1,1,-1,-1,1,1,-1,1,-1,1,-1 ,-1,-1,-1,1,1,-1,-1}

位于空余leftover子载波位置上的+1或者-1，进一步的，该HE-LTF序列还可以包含：连续的+G_a,

或者，连续的+G_b,

或者，连续的+G_a,

或者，连续的+G_b,

或者+G_e(1:13)，+G_e(14:26)。The HE-LTF sequence comprises a sequence G _e, Ga and Gb sequences and derived sequences Ga and Gb generated sequence

+1 or -1 at the position of the spare leftover subcarrier. Further, the HE-LTF sequence may further include: continuous +G _a ,

Or, continuous +G _b ,

Or, continuous +G _a ,

Or, continuous +G _b ,

Or +G _e (1:13), +G _e (14:26).

It can also be stored directly as:

HELTF _4x (-122:122)=

[+1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,-1,

-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,

+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,-1,

+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,

+1,-1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,

-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,

-1,0,0,0,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,

+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,

+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,

-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,

+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+1,

+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,

-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,-1,

+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,

-1, +1, -1, +1, +1].

Those skilled in the art will recognize that the above sequence should be expressed if expressed in the foregoing brief expression:

After the second HELTF sequence is used, the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence. Referring to FIG. 12, it can be seen that the pilot subcarrier and other subcarriers introduce different rotations. At phase, the PAPR value is still very low.

Example five

In the 4x mode, there are 512 subcarriers on the 4x symbol of the 40MHz bandwidth. According to different resource block sizes, the RU size may be 26, 52, 106, 242, 484 subcarriers as shown in FIG. 1b.

There are many HE-LTF sequences on the 40MHz 484 subcarrier 4X mode. Only a few of them are listed below:

The first HELTF sequence in 40MHz 4x mode

G_d，位于空余leftover子载波位置上的+1或者-1，The HE-LTF sequence includes a Ga and Gb sequence and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier,

或者，连续的-G_c,

或者，连续的+G_a,

或者，连续的

+G_b，或者，连续的

+G_d，或者，连续的

-G_b。Further, it may also include a continuous -G _a ,

Or, continuous -G _c ,

Or, continuous +G _a ,

Or continuous

+G _b , or continuous

+G _d , or continuous

-G _b .

It can also be stored directly as:

HELTF _4x (-244:244)=

[+1,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,

+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,+1,+1,+1,

+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,-1,+1,-1,-1,+1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,

+1,+1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,

+1, +1, +1, -1, -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1,

-1,-1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,+1,

+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,

-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,-1,-1,-1,-1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,

-1,+1,-1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,-1,+1,

+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,

+1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1, +1, 0, 0, 0, 0, 0, -1, +1, +1, +1, +1, -1, -1, -1,

+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,

-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,

-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,

+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,

+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,

-1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,+1,-1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,

-1,-1,+1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,

-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,

-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,

-1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,+1,

-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,

+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,

-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,

-1, +1, -1, -1, -1, -1, -1, -1, +1].

Those skilled in the art will recognize that the above sequence should be expressed if expressed in the foregoing brief expression:

Figure 13 shows the PAPR value of the HE-LTF sequence in the 40 MHz bandwidth. It can be seen from the PAPR value of the group that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases. The data reading method in the table can refer to the previous implementation manner, and details are not described herein again.

The second HELTF sequence in 40MHz 4x mode:

G_d，位于空余leftover子载波位置上的+1或者-1，The HE-LTF sequence includes a Ga and Gb sequence and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier,

或者，连续的+G_a,

或者，连续的，-G_c,

或者，连续的+G_d，或者，连续的

+G_b，或者，连续的

+G_b。Further, it may also include a continuous G _c ,

Or, continuous +G _a ,

Or, continuous, -G _c ,

Or continuous +G _d , or continuous

+G _b , or continuous

+G _b .

It can also be stored directly as:

HELTF _4x (-244:244)=

[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,+1,

-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1,

+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,

-1, +1, +1, +1, -1, -1, -1, -1, -1, -1, +1, +1, +1, +1, +1,

+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,

-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,

+1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,

-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,

-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,

-1,-1,-1,+1,+1,+1,+1,+1,+1,+1,+1,+1,+1,+1,+1,

-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,

+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,

-1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1,

-1,-1,0,0,0,0,0,+1,+1,-1,+1,-1,-1,+1,-1,

-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,

-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,

-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,

-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,

+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,

+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,-1,-1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,-1,

+1,-1,-1,+1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,

+1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,

-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,

+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,

+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+1,

+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,

-1,-1,-1,+1,-1,+1,-1,+1,+1]

.

After the second HELTF sequence is used, the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence. Referring to FIG. 13, it can be seen that the pilot subcarrier and other subcarriers introduce different rotations. Phase At the time, the PAPR value is still very low.

Example six

The 80 MHz bandwidth has 1024 subcarriers. According to different resource block sizes, the RU size may be 26, 52, 106, 242, 484, and 996 subcarriers as shown in FIG. 1c.

There are many HE-LTF sequences on the 4X symbol of the 80MHz 996 subcarrier, and several of them are listed below:

The first 80MHz bandwidth 4x mode HE-LTF sequence:

Where G _e ={1,-1,1,-1,1,1,1,1,-1,-1,-1,1,1,1,1,1,1,1,1,-1 ,1,-1,-1,1,1,-1}

G_d，位于空余leftover子载波位置上的+1或者-1，The HE-LTF sequence includes Ge, Ga and Gb sequences and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier,

或者，连续的+G_a,

或者，连续的-G_c,

或者，连续的+G_a,

或者，连续的-G_c,

或者，连续的-G_a,

或者，连续的-G_d,

或者，连续的-G_b,

连续的+G_d,

或者，连续的-G_b,

或者，连续的+G_d,

或者，连续的+G_b,

或者，-G_e(1:13)，-G_e(14:26)。Further, it may also include a continuous +G _c ,

Or, continuous +G _a ,

Or, continuous -G _c ,

Or, continuous +G _a ,

Or, continuous -G _c ,

Or, continuous -G _a ,

Or, continuous -G _d ,

Or, continuous -G _b ,

Continuous +G _d ,

Or, continuous -G _b ,

Or, continuous +G _d ,

Or, continuous +G _b ,

_{Alternatively, -G e (1:13), -} G e (14:26).

It can also be stored directly as:

HELTF _4x (-500:500)=

[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,+1,

-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1,

+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,

-1, +1, +1, +1, -1, -1, -1, -1, -1, -1, +1, +1, +1, +1, +1,

+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,

-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,

+1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,

-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,

-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,

-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,

-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,

+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,

-1, +1, +1, -1, -1, -1, +1, -1, +1, +1, -1, +1, +1, -1, +1,

-1,-1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,

-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,

-1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,

+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,-1,-1,

-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,

-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,

-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,

+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,

+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,

-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,

+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,

+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,

+1,+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,

-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,

+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,

-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,

+1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,

+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,

+1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,

+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,

-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,

-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,

-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,-1,

+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,

+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,

-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,

-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,

+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,

+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,

-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,

+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,

+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,

-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,

+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,

+1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,

+1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, -1,

-1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,

-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,

-1,-1,+1,-1,-1,+1,-1,+1,-1,+1,-1,+1,-1,-1,+1,

+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,

+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,

-1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,

-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,

+1, -1, +1, +1, -1, -1, +1, -1, +1, -1, +1].

Figure 14 shows the PAPR value of the HE-LTF sequence in the 80MHz bandwidth. It can be seen from the PAPR value that the PAPR value is still low when the pilot subcarrier and other subcarriers introduce different rotational phases.

The second 4x mode HE-LTF sequence at 80MHz bandwidth:

Where G _e ={1,1,1,1,1,-1,1,-1,-1,1,-1,-1,1,1,-1,1,-1,1,-1 ,-1,-1,-1,1,1,-1,-1}

G_d，位于空余leftover子载波位置上的+1或者-1，The HE-LTF sequence includes Ge, Ga and Gb sequences and a sequence G _c generated by the Ga and Gb sequences,

G _d , +1 or -1 at the position of the spare leftover subcarrier,

或者，连续的-G_c,

或者，连续的+G_a,

或者，连续的-G_c,

或者，连续的+G_a,

或者，连续的+G_c,

或者，连续的-G_b,

连续的-G_d,

或者，连续的+G_b,

或者，连续的-G_d,

或者，连续的+G_b,

或者，连续的+G_d,

或者-G_e(1:13)，-G_e(14:26)。Further, it may also include a continuous -G _a ,

Or, continuous -G _c ,

Or, continuous +G _a ,

Or, continuous -G _c ,

Or, continuous +G _a ,

Or, continuous +G _c ,

Or, continuous -G _b ,

Continuous -G _d ,

Or, continuous +G _b ,

Or, continuous -G _d ,

Or, continuous +G _b ,

Or, continuous +G _d ,

Or _{-G e (1:13), - G} e (14:26).

It can also be stored directly as:

HELTF _4x (-500:500)=

[+1,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,

+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,+1,+1,+1,

+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,-1,+1,-1,-1,+1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,

+1,+1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,

+1, +1, +1, -1, -1, +1, -1, -1, -1, -1, +1, +1, +1, -1, -1,

-1,-1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,+1,

+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,

-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,-1,-1,-1,-1,

-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,

-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,+1,

+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,

+1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,+1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,

+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,-1,

-1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,

-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,+1,-1,+1,

-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,

+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,+1,+1,-1,

-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,

+1,+1,+1,+1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,

+1, +1, +1, -1, -1, +1, -1, -1, -1, +1, -1, -1, -1, -1, -1,

-1,+1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,

-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,-1,-1,

-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,

+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,

-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,

-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,

-1,-1,-1,+1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,

+1,-1,-1,0,0,0,0,0,-1,-1,+1,-1,+1,-1,+1,

+1, +1, +1, -1, -1, +1, +1, -1, -1, -1, -1, -1, +1, +1, -1,

-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1,

+1,-1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,

-1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, -1, +1,

+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,

+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,-1,+1,

-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,+1,-1,+1,

+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,

-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,+1,+1,

+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,

+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,

-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,

-1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,+1,

+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,-1,+1,-1,

+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,

+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,+1,-1,

-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,

-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,

+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,

+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,

+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,

+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,-1,+1,-1,+1,

-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,

+1,-1,-1,-1,+1,+1,+1,+1,+1,+1,+1,+1,+1,-1,-1,

+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,

+1,-1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,

-1,-1,-1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,

-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,-1,

+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,

+1, +1, +1, -1, -1, +1, +1, +1, +1, +1, +1]

After adopting the 4x mode HE-LTF sequence in the second 80MHz bandwidth, the corresponding PAPR value is the same as the PAPR value of the first HELTF sequence. Referring to FIG. 14, the PAPR value of the group can be seen as the pilot subcarrier. When different rotational phases are introduced with other subcarriers, the PAPR value is still very low.

Example seven

The 4x symbol subcarrier design of 160MHz bandwidth can be spliced by two 80MHz bandwidth 4x symbol subcarrier designs. The main 80M band and the auxiliary 80M band can be continuously spliced or separated by a certain bandwidth (for example, 100MHz interval), and the main 80M band and auxiliary 80M. The frequency band can be flexibly adjusted according to the actual situation before and after the frequency band. Therefore, we can define the 4x HE-LTF sequence (LTF _{80MHz_prime} ) of the main 80M band and the 4x HE-LTF sequence (LTF _{80MHz_second} ) of the auxiliary 80M band, _respectively , and adjust it flexibly according to the interval and band order. Polarity to achieve a lower PAPR.

For convenience of description, let P1 denote the polarity adjustment coefficient of the main 80M sequence, P2 denote the polarity adjustment coefficient of the auxiliary 80M sequence, we fixed P1 to +1, P2 can be +1 or -1, then when two 80M channels When the placement relationship is [main 80M, auxiliary 80M], the 160M sequence is: HE-LTF _160MHz = [P1*LTF _{80MHz_prime} , BI, P2*LTF _{80MHz_second} ]; when the relationship between the two 80M channels is [auxiliary 80M, main 80M] The 160M sequence is: HE-LTF _160MHz = [P2 * LTF _{80MHz_second} , BI, P1 * LTF _{80MHz_prime} ]. Where BI refers to the frequency spacing between two 80M channel edge subcarriers.

When the primary 80M and the secondary 80M channels are adjacent, BI=zeros(1,23), that is, 23 zeros; the HE-LTF _160MHz sequence can be expressed as:

[Main 80M, auxiliary 80M] In the case:

HE-LTF _160MHz (-1012:1012)=[P1*LTF _{80MHz_prime} ,zeros(1,23),P2*LTF _{80MHz_second} ]

[Auxiliary 80M, main 80M] case:

HE-LTF _160MHz (-1012:1012)=[P2*LTF _{80MHz_second} ,zeros(1,23),P1*LTF _{80MHz_prime} ]

Where, zeros(1,23) represents 23 zeros; the remaining undisplayed subcarrier indication numbers (eg: -1024:-1013 and 1013:1023, etc.) The value at the corresponding position defaults to 0.

If the primary 80M and the secondary 80M channels are not adjacent, the BI can be adjusted accordingly;

In this embodiment, the HE-LTF sequence on the 996 subcarrier 4X symbol corresponding to the main 80 MHz (LTF 80 _{MHz_prime} ) bandwidth is the first 80 MHz bandwidth 4× mode HE-LTF sequence in Embodiment 6, and the main 80 MHz bandwidth 996. The HE-LTF sequence on the subcarrier 4X symbol can be expressed as:

It can also be expressed as:

LTF _{80MHz_prime} =

[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+ 1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1,+1,-1,-1, +1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1 ,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1, +1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1 , +1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+ 1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1, +1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1 ,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+ 1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1, +1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1 ,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1, +1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1,-1,+1,+1 , +1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,- 1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1, -1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,-1,-1 ,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,+ 1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1, +1, -1, -1, +1, +1, +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1 ,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1, +1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+ 1,-1,-1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1, +1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1 , +1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1, -1,-1,-1,-1,+1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,- 1,-1,-1,-1,+1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1, -1,-1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1 , +1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,- 1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1, -1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1 ,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+ 1,-1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1, +1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,- 1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1, -1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+ 1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1, -1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1 , +1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+ 1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1, +1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1 ,-1,+1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+ 1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1, +1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1, -1,+1,-1,+1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 , +1, -1, -1, +1, -1, -1, -1, +1, -1, -1, -1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 ,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1, +1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1 ,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,- 1, +1]

The above LTF _{80MHz_prime} can be expressed as:

LTF _{80MHz_prime} = [{1st-484-RU}, {central-26-RU}, {2nd-484-RU}]

Where 1st-484-RU is expressed as:

The central-26-RU is expressed as:

central-26-RU={-G _e (1:13), +1,0,0,0,0,0,+1,-G _e (14:26)}

2nd-484-RU is expressed as:

Auxiliary 80MHz (LTF _{80MHz_second} ) bandwidth 996 subcarrier 4X symbol HE-LTF sequence is composed of 1st-484-RU, 2nd-484-RU and the new central-26-RU (newCentral-26-RU), of which newCentral -26-RU can be expressed as:

newCentral-26-RU=[+1,+1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,0 ,0,0,0,0,-1,-1,-1,-1,+1,-1,+1,+1,+1,+1,-1,+1,+1,-1 ]

LTF _{80MHz_second} can be expressed as follows:

LTF _{80MHz_second} = [{1st-484-RU}, newCentral-26-RU, (-1) * {2nd-484-RU}];

Can also be expressed as:

LTF _{80MHz_second} =

[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,+1,-1,

+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1,+1,-1,

-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,+1,

+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,

-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,

-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,

+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,

-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,

+1, +1, +1, +1, -1, -1, -1, +1, +1, +1, +1, -1, +1, +1, +1, +1,

+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,

-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,

-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,

-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,

-1,-1,-1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,

-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,+1,+1,-1,-1,

+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,+1,

+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,

-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,

+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,

-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,

+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,-1,+1,

+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,

-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,

+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,+1,+1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,

-1, +1, +0, +0, +0, +0, +0, -1, -1, -1, -1, +1, -1, +1, +1, +1,

+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,

+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1,

+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,

-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,-1,+1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,

+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,

+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,

+1,-1,-1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,

+1,+1,+1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,

+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,

+1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,+1,

-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1,

-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,-1,+1,

-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,

+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,

-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,

-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,

+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,

-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,

+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,

-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,

+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,

+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,

-1,-1,+1,-1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,

+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,

-1,-1,+1,+1,-1,+1,-1,+1,-1]

The polarity adjustment coefficients of the main 80MHz bandwidth and the auxiliary 80MHz bandwidth in the two frequency bands and various frequency intervals are shown in the following table, where the primary and secondary channel spacing refers to the center frequency interval of the two 80M bands (interval 80MHz refers to It is a mosaic of two adjacent 80M channels). The corresponding PAPR values in various cases are also shown in the table, where the PAPR value is the maximum value of the phase difference between the data and the pilot.

In addition, in order to reduce the complexity of the system implementation, you can also choose to sacrifice certain PAPR performance, in each case straight The splicing main 80M sequence and the auxiliary 80M sequence are used to obtain a 4x HE-LTF sequence under the 160M bandwidth, that is, all [main 80M, auxiliary 80M] use [P1, P2]=[+1, +1] or [P1, P2]=[+1,-1] polarity adjustment coefficient; all [auxiliary 80M, main 80M] use [P2, P1]=[+1, +1] or [P2, P1]=[-1, +1] polarity adjustment factor.

Example eight

The 2x symbol subcarrier design of 160MHz bandwidth can be spliced by two 80MHz bandwidth 2x symbol subcarrier designs. The main 80M band and the auxiliary 80M band can be continuously spliced or separated by a certain bandwidth (for example, 100MHz interval), and the main 80M band and auxiliary 80M. The frequency band can be flexibly adjusted according to the actual situation before and after the frequency band. Therefore, we can define the 2x HE-LTF sequence (LTF _{80MHz_prime} ) of the main 80M band and the 2x HE-LTF sequence (LTF _{80MHz_second} ) of the auxiliary 80M band, _respectively , and adjust them flexibly according to the interval and band order as a whole in the 80M sequence. Polarity to achieve a lower PAPR.

For convenience of description, let P1 denote the polarity adjustment coefficient of the main 80M sequence, P2 denote the polarity adjustment coefficient of the auxiliary 80M sequence, we fixed P1 to +1, P2 can be +1 or -1, then when two 80M channels When the placement relationship is [main 80M, auxiliary 80M], the 160M sequence is: HE-LTF _160MHz = [P1*LTF _{80MHz_prime} , BI, P2*LTF _{80MHz_second} ]; when the relationship between the two 80M channels is [auxiliary 80M, main 80M] The 160M sequence is: HE-LTF _160MHz = [P2 * LTF _{80MHz_second} , BI, P1 * LTF _{80MHz_prime} ]. Where BI refers to the frequency spacing between two 80M channel edge subcarriers.

When the primary 80M and the secondary 80M channels are adjacent, BI=zeros(1,11), that is, 11 zeros; the HE-LTF _160MHz sequence can be expressed as:

[Main 80M, auxiliary 80M] In the case:

HE-LTF _160MHz (-1012:2:1012)=[P1*LTF _{80MHz_prime} ,zeros(1,11),P2*LTF _{80MHz_second} ]

[Auxiliary 80M, main 80M] case:

HE-LTF _160MHz (-1012:2:1012)=[P2*LTF _{80MHz_second} ,zeros(1,11),P1*LTF _{80MHz_prime} ]

Wherein, zeros(1,11) represents 11 zeros; the remaining undisplayed subcarrier indication numbers (eg: -1024: -1013, 1013:1023, and -1011:2:1011, etc.) have default values of 0. .

If the primary 80M and the secondary 80M channels are not adjacent, the BI can be adjusted accordingly;

In this embodiment, the HE-LTF sequence on the 2X symbol corresponding to the main 80 MHz (LTF 80 _{MHz_prime} ) bandwidth is the second 80 MHz 2X HE-LTF sequence in Embodiment 3, and the HE in the main 80 MHz bandwidth 2X symbol. The LTF sequence can be expressed as:

It can also be expressed as:

LTF _{80MHz_prime} =

[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,

-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,

+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,

+1,-1,-1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,

+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,

+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,

+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,

-1,+1,+1,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,

+1,+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,

+1, +1, +1, -1, -1, -1, +1, +1, +1, 0, 0, 0, +1, -1, -1,

+1,+1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,

-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,

-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,

-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,

+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,

-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,

-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,

-1,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,

-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,

+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,

-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,

-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,

-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,

-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,-1,+1,+1,

+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,

+1, +1, +1, -1, +1, +1]

The above LTF _{80MHz_prime} can be expressed as:

LTF _{80MHz_prime} = [{1st-484-RU}, {central-26-RU}, {2nd-484-RU}]

Where 1st-484-RU is expressed as:

The central-26-RU is expressed as:

central-26-RU={+1,-1,-1,-1,+1,+1,+1,0,0,0,+1,-1,-1,+1,+1,- 1,+1}

2nd-484-RU is expressed as:

The HE-LTF sequence on the 2X symbol of the auxiliary 80MHz (LTF _{80MHz_second} ) bandwidth is composed of 1st-484-RU, 2nd-484-RU, and new central-26-RU (newCentral-26-RU), of which newCentral-26- RU can be expressed as:

newCentral-26-RU=[-1,-1,+1,-1,-1,-1,-1,0,0,0,+1,+1,-1,-1,-1,+ 1,-1]

Then LTF _{80MHz_second} can be expressed as follows:

LTF _{80MHz_second} = [{1st-484-RU}, newCentral-26-RU, (-1) * {2nd-484-RU}];

Can also be expressed as:

LTF _{80MHz_second} =

[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,

-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,

+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,

+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,

-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,

-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,

+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,

-1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,

+1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,

-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,

+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,

-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,

-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,

-1,+1,+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,

+1, +1, -1, -1, +1, -1, -1, -1, -1, +0, +0, +0, +1, +1, -1, -1,

-1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,

+1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, -1,

+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,-1,+1,+1,

-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,-1,-1,-1,+1,-1,

-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,

-1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,

+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,

+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,+1,-1,-1,+1,-1,

-1,-1,+1,+1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,

-1,-1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,

-1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,

+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,

-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,

-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,

-1,-1,+1,-1,-1]

The polarity adjustment coefficients of the main 80MHz bandwidth and the auxiliary 80MHz bandwidth in the two frequency bands and various frequency intervals are shown in the following table, where the primary and secondary channel spacing refers to the center frequency interval of the two 80M bands (interval 80MHz refers to It is a mosaic of two adjacent 80M channels). The corresponding PAPR values in various cases are also shown in the table, where the PAPR value is the maximum value of the phase difference between the data and the pilot.

In addition, in order to reduce the complexity of the system implementation, it is also possible to sacrifice certain PAPR performance. In each case, the main 80M sequence and the auxiliary 80M sequence are directly spliced to obtain a 2x HE-LTF sequence under 160M bandwidth, that is: all [main 80M, auxiliary In the case of 80M], the polarity adjustment coefficients of [P1, P2] = [+1, +1] or [P1, P2] = [+1, -1] are used; all [auxiliary 80M, main 80M] are used [ P2, P1] = [+1, +1] or [P2, P1] = [-1, +1] polarity adjustment factor.

The HE-LTF sequences in the 2x or 4x modes of the above various bandwidths are only specific examples, and these preferred sequences have lower PAPR values. Of course, the embodiments of the present invention may also have other HE-LTF sequences, which conform to the characteristics of the sequences mentioned in the embodiment, and can be obtained by the aforementioned construction method.

Accordingly, another embodiment provides a HE-LTF processing apparatus (not shown) for use in a wireless local area network employing OFDMA technology, including a processing unit for performing the method of the foregoing implementation. For the structure and content of the specific frame, reference may be made to the foregoing embodiments, and details are not described herein again. The processing unit may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or may implement or perform the embodiments of the present invention. Various methods, steps, and logic blocks are disclosed. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. It is easy to understand that the above HE-LTF processing device can be located at an access point or a site.

Figure 15 is a block diagram of an access point in accordance with another embodiment of the present invention. The access point of Figure 15 includes an interface 101, a processing unit 102, and a memory 103. Processing unit 102 controls the operation of access point 100. Memory 103 can include read only memory and random access memory and provides instructions and data to processing unit 102. A portion of the memory 103 may also include non-volatile line random access memory (NVRAM). The various components of access point 100 are coupled together by a bus system 109, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as the bus system 109 in FIG.

The method for transmitting the foregoing various frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 102 or implemented by the processing unit 102. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processing unit 102 or an instruction in the form of software. Processing unit 102 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device, discrete gate or crystal The methods, steps, and logic blocks disclosed in the embodiments of the present invention may be implemented or executed. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 103, and the processing unit 102 reads the information in the memory 103 and completes the steps of the above method in combination with its hardware.

Figure 16 is a block diagram of a station in accordance with another embodiment of the present invention. The access point of FIG. 16 includes an interface 111, a processing unit 112, and a memory 113. Processing unit 112 controls the operation of site 110. Memory 113 can include read only memory and random access memory and provides instructions and data to processing unit 112. A portion of the memory 113 may also include non-volatile line random access memory (NVRAM). The various components of the site 110 are coupled together by a bus system 119, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 119 in FIG.

The method for receiving the foregoing various frames disclosed in the foregoing embodiments of the present invention may be applied to the processing unit 112 or implemented by the processing unit 112. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processing unit 112 or an instruction in a form of software. The processing unit 112 can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed in an embodiment of the invention. Various methods, steps, and logic blocks of the disclosure. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 113, and the processing unit 112 reads the information in the memory 113 and performs the steps of the above method in combination with its hardware.

Specifically, the memory 113 stores such that the processing unit 112 performs the method as mentioned in the foregoing embodiments.

It is to be understood that the phrase "one embodiment" or "an embodiment" or "an" Thus, "in one embodiment" or "in an embodiment" or "an" In addition, these Particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In various embodiments of the present invention, the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented in the embodiment of the present invention. Form any limit.

Additionally, the terms "system" and "network" are used interchangeably herein. The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or may be Each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital STA line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated media. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In summary, the above description is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims (32)

A method for transmitting a long training sequence in a wireless local area network data packet, wherein the data packet conforms to an 802.11ax standard, and the method includes: The access point AP obtains an HE-LTF sequence corresponding to the total bandwidth of the transmission according to the total transmission bandwidth, (101) And mapping, according to the resource block RU size and the RU location allocated for the station, the sequence segment corresponding to the RU location in the HE-LTF sequence to the subcarrier position of the allocated RU and sending it out (102) Wherein, the HE-LTF in the 2x mode when the total transmission bandwidth is 80M is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1, +1, +1, +1, -1, +1, +1, +1, +1, -1, -1, -1 , +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, - 1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1 ,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1, -1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,- 1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+ 1, +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: the child of the even position in the subcarrier of the sequence number -500 to 500 The values on the carrier are sequentially the values in the above sequence, and the values of the subcarriers at other positions are zero. The method of claim 1 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A method for receiving a wireless local area network data packet, comprising: Receiving a data packet conforming to the 802.11ax standard, obtaining a total transmission bandwidth indicated in the data packet (201); Obtaining an HE-LTF sequence corresponding to the total bandwidth of the transmission according to the total transmission bandwidth (202); Determining, according to the resource block RU size and the resource block RU location allocated to the station in the data packet, a corresponding HE-LTF sequence segment as a reference sequence for channel estimation corresponding to the RU (203); Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 2x mode is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1, +1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1 , +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, - 1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1 ,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1, -1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,- 1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+ 1, +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: the child of the even position in the subcarrier of the sequence number -500 to 500 The values on the carrier are sequentially the values in the above sequence, and the values of the subcarriers at other positions are zero. The method of claim 3 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A method for transmitting a long training sequence in a data packet in a wireless local area network, the data packet conforming to the 802.11ax standard, characterized in that The station STA obtains a HE-LTF sequence corresponding to the bandwidth according to the indicated total bandwidth of the transmission (301); And the station STA maps the sequence segment corresponding to the RU location in the HE-LTF sequence to the subcarrier position of the allocated RU according to the allocated resource block RU size and the RU location, and sends the sequence segment. (302) Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 2x mode is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1 , +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, - 1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1 ,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1, -1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,- 1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+ 1, +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: the child of the even position in the subcarrier of the sequence number -500 to 500 The values on the carrier are sequentially the values in the above sequence, and the values of the subcarriers at other positions are zero. Method according to claim 5, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A method for receiving a data packet of a wireless local area network, characterized in that The access point AP receives the data packet conforming to the 802.11ax standard, and obtains an HE-LTF sequence corresponding to the total transmission bandwidth according to the total transmission bandwidth (401); Determining, by the AP, a corresponding HE-LTF sequence segment from the HE-LTF sequence according to a resource block RU size and an RU location allocated for each uplink station, as a reference sequence for channel estimation of the RU (402) Wherein, the HE-LTF in the 2x mode when the total transmission bandwidth is 80M is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1, -1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1 , +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, - 1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1 ,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1, -1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,- 1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+ 1, +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: the child of the even position in the subcarrier of the sequence number -500 to 500 The values on the carrier are sequentially the values in the above sequence, and the values of the subcarriers at other positions are zero. The method of claim 7 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A method for transmitting a long training sequence in a wireless local area network data packet, the data packet conforming to the 802.11ax standard, and includes: The access point AP obtains an HE-LTF sequence corresponding to the total bandwidth of the transmission according to the total transmission bandwidth, (101) And mapping, by the AP, the sequence segment corresponding to the location of the RU in the HE-LTF sequence to the subcarrier position of the allocated RU according to the resource block RU size and the RU location allocated for the station, and sending the sequence (102); wherein, in the total transmission bandwidth of 80M, the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+ 1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1 ,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1, +1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+ 1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1, +1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+ 1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1, +1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1 , +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1, +1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1 , +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1, -1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1, +1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1, -1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+ 1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1, -1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1 ,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1, +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1 ,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+ 1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1, +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,-1 , +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1, +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1, -1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The method of claim 9 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A method for receiving a wireless local area network data packet, comprising: Receiving a data packet conforming to the 802.11ax standard, obtaining a total transmission bandwidth indicated in the data packet (201); Obtaining an HE-LTF sequence corresponding to the total bandwidth of the transmission according to the total transmission bandwidth (202); The scheduled station STA determines a corresponding HE-LTF sequence segment as a reference sequence for channel estimation of the RU according to the resource block RU size and the resource block RU location allocated to the station in the data packet. ); Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1 ,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,- 1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1, +1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1 , +1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1, -1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1, +1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1 , +1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1,+ 1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+1 ,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+ 1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1, +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1 ,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+ 1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1, +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1 ,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1, -1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1, -1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+ 1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1, -1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1 ,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1, +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1 ,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+ 1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1, +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,-1 , +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1, +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1, -1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The method of claim 11 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A method for transmitting a long training sequence in a data packet in a wireless local area network, the data packet conforming to the 802.11ax standard, characterized in that The station STA obtains a HE-LTF sequence corresponding to the bandwidth according to the indicated total bandwidth of the transmission (301); And the station STA maps the sequence segment corresponding to the RU location in the HE-LTF sequence to the subcarrier position of the allocated RU according to the allocated resource block RU size and the RU location, and sends the sequence segment. (302); Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1, -1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+ 1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1 ,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1, +1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+ 1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1, +1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+ 1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1, +1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1 , +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1, +1,-1,-1,-1,-1,-1,+1, +1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1 , +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1, +1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,- 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1, +1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+ 1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1, +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1 ,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+ 1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, +1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1 , +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+ 1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1, +1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1 , +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,- 1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1 , +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+ 1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1, -1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1 ,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The method of claim 13 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A method for receiving a data packet of a wireless local area network, characterized in that The access point AP receives the data packet conforming to the 802.11ax standard, and obtains an HE-LTF sequence corresponding to the total transmission bandwidth according to the total transmission bandwidth (401); Determining, by the AP according to the resource block RU size and the RU location allocated by each uplink station, a corresponding HE-LTF sequence segment from the HE-LTF sequence as a reference sequence for channel estimation of the RU (402) ); Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1, +1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+ 1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1 ,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1, +1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+ 1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1, +1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+ 1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1, +1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1 , +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1, +1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1 , +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1, -1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,-1,+1,-1,-1, +1,+1,+1,-1,+1,+1,+1, -1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+ 1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1, -1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1 ,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1, +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1 ,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+ 1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1, +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,-1 , +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1, +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1, -1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The method of claim 15 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on an access point side following an 802.11ax, characterized in that A unit (101) for obtaining an HE-LTF sequence corresponding to the total bandwidth of the transmission according to a total bandwidth of transmission And mapping, according to the resource block RU size and the RU location allocated for the station, the sequence segment corresponding to the RU location in the HE-LTF sequence to the subcarrier position of the allocated RU and sending it out (102) The unit of the HE-LTF in the 2x mode when the total transmission bandwidth is 80M is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1, +1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1 ,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1, +1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1 ,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1,- 1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1, -1,-1,-1,-1,+1,+1, +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1 ,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,- 1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1, -1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1 , +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: subcarriers of even positions in subcarriers with a sequence number of -500 to 500 The values on the above are sequentially the values in the above sequence, and the values of the subcarriers at other positions are 0. The device of claim 17 wherein The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on a site side following an 802.11ax, characterized in that Means for receiving a data packet conforming to the 802.11ax standard, and obtaining a total transmission bandwidth (201) indicated in the data packet; Means for obtaining an HE-LTF sequence (202) corresponding to the total bandwidth of the transmission according to the total bandwidth of the transmission; And determining, according to the resource block RU size and the resource block RU location allocated to the station in the data packet, a corresponding HE-LTF sequence segment as a reference sequence (203) for channel estimation corresponding to the RU unit; Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 2x mode is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1, +1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1 , +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, - 1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1 ,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1, -1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,- 1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+ 1, +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: the child of the even position in the subcarrier of the sequence number -500 to 500 The values on the carrier are sequentially the values in the above sequence, and the values of the subcarriers at other positions are zero. The device according to claim 19, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on a site side following an 802.11ax, characterized in that Means for obtaining a HE-LTF sequence (301) corresponding to the bandwidth according to the indicated total bandwidth of the transmission; For mapping a sequence segment corresponding to the RU location in the HE-LTF sequence to a subcarrier position of the allocated RU according to the allocated resource block RU size and the RU location (302) Unit; (302) Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 2x mode is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1, +1,+1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1 ,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1, -1, +1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1 ,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1,- 1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1, +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1 ,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,- 1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1, -1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1 , +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: subcarriers of even positions in subcarriers with a sequence number of -500 to 500 The values on the above are sequentially the values in the above sequence, and the values of the subcarriers at other positions are 0. The device according to claim 21, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on an access point side following an 802.11ax, characterized in that For receiving a data packet conforming to the 802.11ax standard, obtaining a unit of the HE-LTF sequence (401) corresponding to the total bandwidth of the transmission according to the total transmission bandwidth; And determining, according to the resource block RU size and the RU location allocated for each uplink station, a corresponding HE-LTF sequence segment from the HE-LTF sequence as a reference sequence for channel estimation of the RU (402) The unit of the HE-LTF in the 4x mode when the total transmission bandwidth is 80M is: HELTF _2x (-500:2:500)=[+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+ 1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1 , +1,-1,-1,-1,-1,+1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1, +1,-1,-1,+1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,-1,+1,+1,-1,+1, +1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1, +1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,-1,-1,+1,+1,+1,-1,- 1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, -1,+1,+1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1 ,-1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+1,+1,- 1,+1,-1,-1,-1,+1,-1,-1,-1,-1,+1,+1,+1,+1,-1,-1,-1, +1, +1, +1, 0, 0, 0, +1, -1, -1, +1, +1, -1, +1, -1, -1, -1, +1, +1 ,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1, +1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,-1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1 , +1, +1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, -1, +1, +1, +1, - 1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,+1,-1,+1,-1,-1,+1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1 ,+1,+1,+1,-1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,-1,- 1,-1,+1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,-1,-1, -1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1 , +1,-1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1,-1,-1,-1,+1,- 1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1, -1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,-1,-1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,+ 1, +1, -1, +1, +1, +1, -1, +1, +1]; the expression means: the child of the even position in the subcarrier of the sequence number -500 to 500 The values on the carrier are sequentially the values in the above sequence, and the values of the subcarriers at other positions are zero. The device according to claim 23, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on an access point side following an 802.11ax, characterized in that Includes include: A unit for obtaining an HE-LTF sequence corresponding to the total bandwidth of the transmission according to the total bandwidth of the transmission, (101) And mapping, according to the resource block RU size and the RU location allocated for the station, a sequence segment corresponding to the RU location in the HE-LTF sequence to a subcarrier position of the allocated RU and transmitting the a unit of 102); wherein the HE-LTF in the 4x mode when the total transmission bandwidth is 80M is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1 ,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1,- 1,+1,-1, -1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1, +1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1 , +1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1, -1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1,+ 1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1, +1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1 , +1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1,+ 1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+1 ,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,+ 1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1, +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1 ,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1,+ 1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1, +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1 ,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1, -1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1, -1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1 ,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+ 1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1, -1,-1,+1, -1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1 ,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1, +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1 ,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+ 1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1, +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,-1 , +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1, +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1, -1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The device according to claim 25, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on a site side following an 802.11ax, characterized in that: Means for receiving a data packet conforming to the 802.11ax standard, and obtaining a total transmission bandwidth (201) indicated in the data packet; Means for obtaining an HE-LTF sequence (202) corresponding to the total bandwidth of the transmission according to the total bandwidth of the transmission; And determining, according to the resource block RU size and the resource block RU location allocated to the station in the data packet, a corresponding HE-LTF sequence segment as a unit of the reference sequence (203) for channel estimation of the RU ; Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+ 1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1 ,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1, +1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 ,+1,+1,+1,-1,-1,+1, +1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+ 1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1, +1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+ 1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1, +1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1 , +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1, +1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1 , +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1, +1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,- 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1, +1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+ 1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1, +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1 ,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+ 1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, +1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1 , +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+ 1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1, +1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1 , +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,- 1,+1,-1,+1,-1,-1,+1, +1,-1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1 , +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+ 1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1, -1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1 ,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1, +1, -1, -1, +1, -1, +1, -1, +1]; the expression means: the value on each subcarrier in the subcarriers with a sequence number of -500 to 500 In turn, the values in the above sequence. The device according to claim 27, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on a site side following an 802.11ax, characterized in that Means for obtaining a HE-LTF sequence (301) corresponding to the bandwidth according to the indicated total bandwidth of the transmission; For mapping a sequence segment corresponding to the RU location in the HE-LTF sequence to a subcarrier position of the allocated RU according to the allocated resource block RU size and the RU location (302) ) Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,- 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+ 1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1 ,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1, +1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+ 1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1, +1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+ 1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1, +1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1 , +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1, +1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1 , +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1, -1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1, +1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1 ,-1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,- 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1, +1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+ 1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,+1,+1, +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1 ,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+ 1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1, +1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1 , +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+ 1,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1, +1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1 , +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,- 1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1 , +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+ 1,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1, -1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1 ,-1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The device according to claim 29, characterized in that The HE-LTF sequence is a stored sequence or a constructed sequence. A device applied to a wireless local area network, located on an access point side following an 802.11ax, characterized in that For receiving a data packet conforming to the 802.11ax standard, obtaining a unit of the HE-LTF sequence (401) corresponding to the total bandwidth of the transmission according to the total transmission bandwidth; And selecting, according to the resource block RU size and the RU location allocated by each uplink station, a corresponding HE-LTF sequence segment from the HE-LTF sequence as a reference sequence for channel estimation of the RU (402) Unit Wherein, the total bandwidth of the transmission is 80M, and the HE-LTF in the 4x mode is: HELTF _4x (-500:500)=[+1,+1,-1,+1,-1,+1,-1,-1,-1,+1,-1,-1,-1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,-1,+1,-1, +1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,+1 ,+1,+1,-1,-1,-1,-1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+ 1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1, -1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1 , +1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,+1,+1,+1,-1,- 1,+1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1, -1,+1,-1,+1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1 ,-1,-1,+1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+ 1,-1,+1,+1,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1, -1,-1,-1,+1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1,+1,-1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1, -1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,+1,-1,+1,-1,+1 ,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1,-1, -1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+1,+1,+1,+1,-1,+1 ,-1,-1,-1,-1,-1,-1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,- 1, +1, -1, +1, +1, -1, -1, +1, -1, +1, -1, -1, - 1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1, -1,+1,-1,-1,+1,-1,+1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+ 1,+1,-1,+1,-1,+1,-1,+1,+1,+1,-1,+1,+1,+1,-1,-1,+1, -1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,+1,-1,+1,-1,+1,+1 ,-1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,+1,-1,-1,-1,+ 1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,+1,-1,+1,+1,+1,-1, +1,+1,-1,-1,-1,+1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1 ,+1,+1,+1,-1,-1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,+ 1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,-1,+1,-1,-1,-1,-1, +1,+1,+1,-1,-1,+1,0,0,0,0,0,+1,-1,-1,-1,-1,-1,-1,+ 1,-1,+1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,-1,-1,+1,-1, +1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,+1,+1,+1,+1,+1,+1 , +1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,-1,-1,-1,-1,-1,+1, +1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1,-1 , +1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,-1,-1,+1,-1,+1,-1,-1,-1,-1, -1,-1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,-1 ,-1,+1,-1,-1,+1,-1,+1,+1,+1,-1,+1,-1,-1,+1,+1,-1,+ 1,-1,+1,+1,+1,-1,-1,+1,-1,-1,-1,+1,-1,-1,-1,-1,-1, -1,-1,+1,-1,+1,+1,-1,+1,+1,-1,+1,-1,-1,-1,+1,+1,-1 ,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1,-1,-1,-1,-1,+ 1,+1,-1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+1,+1, -1,+1,-1,+1,-1,-1,-1,-1,-1,+1,+1,+1,-1,-1,-1,-1,+1 ,-1,-1,+1,+1,+1,-1, +1,+1,-1,-1,+1,-1,+1,-1,+1,+1,+ 1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,-1, -1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1,+1 ,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1,+ 1,+1,-1,+1,+1,+1,+1,+1,-1,-1,+1,+1,+1,+1,+1,-1,+1, +1,-1,-1,-1,+1,-1,-1,-1,+1,-1,+1,-1,+1,+1,+1,+1,+1 ,-1,-1,-1,+1,+1,+1,+1,-1,+1,+1,-1,-1,-1,+1,-1,-1,+ 1,+1,-1,+1,-1,+1,-1,-1,-1,-1,-1,-1,+1,+1,-1,-1,-1, +1,-1,-1,+1,+1,+1,-1,+1,-1,-1,+1,-1,-1,+1,-1,+1,-1 , +1,-1,+1,-1,-1,+1,+1,-1,+1,-1,+1,+1,+1,-1,-1,+1,- 1,-1,-1,+1,-1,-1,-1,-1,-1,-1,-1,+1,-1,+1,+1,-1,+1, +1,-1,+1,-1,-1,-1,+1,+1,-1,+1,+1,+1,-1,-1,+1,+1,+1 ,+1,+1,-1,+1,-1,-1,-1,-1,+1,+1,-1,-1,-1,-1,-1,+1,- 1,-1,+1,+1,+1,-1,+1,+1,+1,-1,+1,-1,+1,-1,-1,-1,-1, -1,+1,+1,+1,-1,-1,-1,-1,+1,-1,-1,+1,+1,+1,-1,+1,+ 1,-1,-1,+1,-1,+1,-1,+1]; the expression means that the values on each subcarrier in the subcarriers with the sequence number -500 to 500 are in turn Is the value in the above sequence. The device according to claim 31, wherein The HE-LTF sequence is a stored sequence or a constructed sequence.

Images