CN107888351B - Reference signal sending method, reference signal processing method and equipment - Google Patents

Abstract

The embodiment of the invention provides a reference signal sending method, a reference signal processing method and a device, relates to the technical field of communication, and solves the problem that in the prior art, different serving cells send reference on the same time-frequency resourceThere is a problem of interference in the signal. The method comprises the following steps: the transmitter is spaced according to the first subcarrier₁Determining the first subcarrier spacing f₁A corresponding first reference signal sequence; wherein the first subcarrier spacing f₁The frequency interval of two adjacent subcarrier peaks is referred to; the transmitter uses the first subcarrier spacing f in its serving cell₁Transmitting said first reference signal sequence on at least one OFDM symbol, whereby a receiver receives on at least one OFDM symbol from a transmitter using said first subcarrier spacing f in its serving cell₁The transmitted first reference signal sequence.

Description

Reference signal transmission method, reference signal processing method and device

technical field

The present invention relates to the field of communication technologies, and in particular, to a reference signal sending method, a reference signal processing method and device.

Background technique

The reference signal is used for data demodulation and channel sounding, and the design of the reference signal sequence needs to minimize the interference of user equipment (English: user equipment, UE) in different cells sending the reference signal on the same time-frequency resource. At present, in the long term evolution (English: long term evolution, LTE for short) system, the uplink reference signal uses the Zadoff-Chu (ZC) sequence, and according to the cross-correlation between sequences, multiple ZC sequences are grouped to ensure that the The ZC sequences in the group had high cross-correlations, while the ZC sequences in other groups had low cross-correlations. UEs in the same cell use sequences in the same ZC sequence group, and UEs in different cells use sequences in different ZC sequence groups, thereby ensuring that UEs in different cells transmit reference signals on the same time-frequency resource with little interference.

Among them, when the ZC sequence is grouped in the LTE system, it is assumed that different cells use the same subcarrier interval for reference signal transmission, and the time-frequency resources occupied by UEs in different cells when sending the reference signal sequence may include multiple As shown in FIG. 1 , each resource unit occupies one OFDM symbol in the time domain and one subcarrier in the frequency domain, wherein the subcarrier spacing is 15 kHz. However, with the rapid development of communication technology, 3GPP has proposed access networks that support different subcarrier widths, and cells can change the subcarrier widths they use, so the assumption that different cells use the same subcarrier widths no longer holds. As a result, the cross-correlation between the reference signal sequences is destroyed, which further leads to the interference of the reference signals sent by UEs in different cells on the same time-frequency resource, and the access and data transmission performance of the cells is degraded.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a reference signal sending method, a reference signal processing method and device, which solve the interference problem in the prior art when different serving cells send reference signals on the same time-frequency resource.

To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

A first aspect provides a method for sending a reference signal, the method comprising: a transmitter determining a first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1; wherein the first subcarrier interval f ₁ refers to the frequency interval of two adjacent sub-carrier peaks; the transmitter transmits the first reference signal sequence on at least one OFDM symbol using the first sub-carrier interval f ₁ in its serving cell. In the above technical solution, the transmitter can be made to determine the first reference signal sequence according to the used first subcarrier interval, and the correlation between the first reference signal sequence and its reference signal sequence in the serving cell is high, and the correlation between the first reference signal sequence and the reference signal sequence in other serving cells is high. The correlation of reference signal sequences is low, thereby avoiding interference when different server cells use the same time-frequency resources to transmit reference signals.

In a possible implementation manner, the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal The signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the _first subcarrier interval f1. In the above-mentioned optional technical solution, the provided method for determining the first reference signal sequence can ensure that the first reference signal sequence determined by the transmitter according to the first subcarrier spacing has a high correlation with its reference signal sequence in the serving cell. sex.

In a possible implementation manner, if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: f ₁ =f ₀ *2 ⁿ , where n is an integer greater than or equal to 0, then the first reference signal The root index Q of the base sequence corresponding to the sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, and the reference base sequence refers to the reference subcarrier interval f The base sequence corresponding to the reference signal sequence corresponding to ₀ ; the first reference signal sequence corresponding to the _first subcarrier interval f1 is obtained by extracting the preset generation sequence according to the _first subcarrier interval f1, specifically: according to the first subcarrier interval f1 The relationship between the subcarrier interval f ₁ and the reference subcarrier interval f ₀ is obtained by extracting one preset generation sequence every 2 ⁿ ; wherein, the preset generation sequence is the reference signal sequence corresponding to the reference subcarrier interval f ₀ generation sequence. In the above-mentioned optional technical solution, the transmitter can be made to determine the relationship between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index q according to the relationship between the _first subcarrier spacing f1 and the reference subcarrier spacing _f0 . , so that the first reference signal sequence can be extracted from the preset generation sequence according to the relationship between the two.

In a possible implementation manner, the transmitter determines the sequence group identifier of the reference signal sequence group used by the serving cell; the transmitter determines the reference root index q according to the sequence group identifier. In the above-mentioned optional technical solution, a method for determining the reference root index q is provided.

In a possible implementation manner, the method further includes: the transmitter receives the indication information sent by the receiver, and determines the reference root index q according to the indication information. In the above-mentioned optional technical solution, another method for determining the reference root index q is provided.

In a possible implementation manner, the transmitter obtains the base sequence corresponding to the first reference signal sequence from the first correspondence corresponding to the sequence group identifier according to the _first subcarrier interval f1 and the length M of the first reference signal sequence _The root index Q _of the The sequence corresponds to the root index of the base sequence. In the above optional technical solution, the transmitter can obtain the root index Q of the base sequence corresponding to the first reference signal sequence according to f ₁ and M from the first correspondence, so that the first reference signal can be generated according to the obtained root index Q. sequence.

In a possible implementation manner, if the receiver is a base station, before the transmitter determines the first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1, the method further includes: the transmitter Receive control signaling or high-level signaling sent by the base station, where the control signaling or high-level signaling includes frequency domain resource information of the reference signal sent by the transmitter; the transmitter determines the first subcarrier interval f ₁ according to the frequency domain resource information. In the above optional technical solution, the transmitter may determine the first subcarrier interval f ₁ according to the control signaling or high-layer signaling sent by the base station.

In a second aspect, a reference signal processing method is provided, the method comprising: a receiver receiving, on at least one OFDM symbol, a signal corresponding to a _first subcarrier interval f1 sent by _a transmitter using a first subcarrier interval f1 in a serving cell of the receiver. The first reference signal sequence; wherein, the first reference signal sequence corresponding to the _first subcarrier interval f1 is determined by the transmitter according to the _first subcarrier interval f1. In the above technical solution, the correlation between the first reference signal sequence and the reference signal sequence in the serving cell of the transmitter is relatively high, and the correlation with the reference signal sequence in other serving cells is relatively low, so that it can be avoided that different server cells use the same reference signal sequence. Interference when sending reference signals on simultaneous frequency resources.

In a possible implementation manner, the method further includes: the receiver determines a second reference signal sequence, and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is The signal sequence is determined according to the _first subcarrier interval f1. In the above-mentioned optional technical solution, the receiver determines the second reference signal sequence according to the _first subcarrier interval f1, and processes the first reference signal sequence according to the second reference signal sequence, so that the received first reference signal can be guaranteed. Correctness of the signal sequence.

In a possible implementation manner, the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal The sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ . In the above-mentioned optional technical solution, the provided method for determining the first reference signal sequence can ensure that the first reference signal sequence determined according to the first subcarrier spacing and the reference signal sequence in the serving cell of the transmitter have a higher value. Correlation.

In a possible implementation manner, if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: f ₁ =f ₀ *2 ⁿ , where n is an integer greater than or equal to 0, then the first reference signal The root index Q of the base sequence corresponding to the sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, and the reference base sequence refers to the reference subcarrier interval f The base sequence corresponding to the reference signal sequence corresponding to ₀ ; the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , specifically: according to the first subcarrier interval f ₁ and the reference subcarrier The relationship of the interval f ₀ is obtained by extracting one preset generation sequence every 2 ⁿ ; wherein, the preset generation sequence is the generation sequence of the reference signal sequence corresponding to the reference subcarrier interval f ₀ . In the above-mentioned optional technical solution, the relationship between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index q is determined according to the relationship between the _first subcarrier spacing f1 and the reference subcarrier spacing _f0 , so that the relationship between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index q can be The relationship between the two is extracted from the preset generation sequence to obtain the first reference signal sequence.

In a possible implementation manner, the method further includes: the receiver sends indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information. In the above-mentioned optional technical solution, a method for determining the reference root index q is provided.

In a possible implementation manner, the method further includes: if the receiver is a base station, the method further includes: the base station sends control signaling or high-level signaling to the transmitter, where the control signaling or high-level signaling includes a reference sent by the transmitter frequency domain resource information of the signal, so that the transmitter determines the first subcarrier interval f ₁ according to the frequency domain resource information. In the above-mentioned optional technical solution, another method for determining the reference root index q is provided.

In a third aspect, a transmitter is provided. The transmitter includes: a determining unit configured to determine a first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1; wherein the first subcarrier interval The interval f ₁ refers to the frequency interval of two adjacent sub-carrier peaks; the sending unit is configured to send the first reference signal sequence on at least one OFDM symbol using the first sub-carrier interval f ₁ in its serving cell.

In a possible implementation manner, the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal The signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the _first subcarrier interval f1.

In a possible implementation manner, if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: f ₁ =f ₀ *2 ⁿ , where n is an integer greater than or equal to 0, then the first reference signal The root index Q of the base sequence corresponding to the sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, and the reference base sequence refers to the reference subcarrier interval f The base sequence corresponding to the reference signal sequence corresponding to ₀ ; the first reference signal sequence corresponding to the _first subcarrier interval f1 is obtained by extracting the preset generation sequence according to the _first subcarrier interval f1, specifically: according to the first subcarrier interval f1 The relationship between the subcarrier interval f ₁ and the reference subcarrier interval f ₀ is obtained by extracting one preset generation sequence every 2 ⁿ ; wherein, the preset generation sequence is the reference signal sequence corresponding to the reference subcarrier interval f ₀ generation sequence.

In a possible implementation manner, the determining unit is further configured to: determine the sequence group identifier of the reference signal sequence group used by the serving cell; and determine the reference root index q according to the sequence group identifier.

In a possible implementation manner, the transmitter further includes: a receiving unit, configured to receive the indication information sent by the receiver; and a determining unit, further configured to determine the reference root index q according to the indication information.

In a possible implementation manner, the determining unit is further configured to obtain the first reference signal from the first correspondence corresponding to the sequence group identifier according to the first subcarrier interval f ₁ and the length M of the first reference signal sequence The sequence corresponds to the root index Q of the base sequence; wherein, the first correspondence includes at least the first subcarrier interval f ₁ , the length M of the first reference signal sequence, and the sequence root index corresponding to f ₁ and M, and the sequence root index is The first reference signal sequence corresponds to the root index of the base sequence.

In a possible implementation manner, if the receiver is a base station, the receiving unit is further configured to receive control signaling or high-level signaling sent by the base station, and the control signaling or high-level signaling includes frequency domain resources for the reference signal sent by the transmitter information; the determining unit is further configured to determine the first subcarrier interval f ₁ according to the frequency domain resource information.

In a fourth aspect, a receiver is provided, the receiver comprising: a receiving unit configured to receive, on at least one OFDM symbol, a first subcarrier interval f1 corresponding to a _first subcarrier interval f1 sent by _a transmitter in its serving cell using the first subcarrier interval f1 where the first reference signal sequence corresponding to the _first subcarrier interval f1 is determined by the transmitter according to the _first subcarrier interval f1.

In a possible implementation manner, the receiver further includes: a determining unit, configured to determine the second reference signal sequence, and process the received first reference signal sequence according to the determined second reference signal sequence; wherein, The second reference signal sequence is determined according to the _first subcarrier interval f1.

In a possible implementation manner, the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal The sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ .

In a possible implementation manner, if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: f ₁ =f ₀ *2 ⁿ , where n is an integer greater than or equal to 0, then the first reference signal The root index Q of the base sequence corresponding to the sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, and the reference base sequence refers to the reference subcarrier interval f The base sequence corresponding to the reference signal sequence corresponding to ₀ ; the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , specifically: according to the first subcarrier interval f ₁ and the reference subcarrier The relationship of the interval f ₀ is obtained by extracting one preset generation sequence every 2 ⁿ ; wherein, the preset generation sequence is the generation sequence of the reference signal sequence corresponding to the reference subcarrier interval f ₀ .

In a possible implementation manner, the receiver further includes: a sending unit, configured to send indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information.

In a possible implementation manner, if the receiver is a base station, the sending unit is further configured to send control signaling or high-level signaling to the transmitter, where the control signaling or high-level signaling includes frequency domain resources for the transmitter to send reference signals information, so that the transmitter determines the first subcarrier interval f ₁ according to the frequency domain resource information.

A fifth aspect provides a transmitter, the transmitter includes a memory, a processor, a system bus and a communication interface, the memory stores code and data, the processor and the memory are connected through the system bus, and the processor runs the code in the memory to make the transmitter The reference signal sending method provided by the first aspect or any possible implementation manner of the first aspect is performed.

A sixth aspect provides a receiver, the receiver includes a memory, a processor, a system bus and a communication interface, the memory stores code and data, the processor and the memory are connected through the system bus, and the processor runs the code in the memory to make the receiver The second aspect or the reference signal processing method provided by any possible implementation manner of the second aspect is performed.

A seventh aspect provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when at least one processor of a device executes the computer-executable instructions, the device executes the first aspect or the first aspect The reference signal sending method provided by any of the possible implementations, or the reference signal processing method provided by the second aspect or any of the possible implementations of the second aspect.

In an eighth aspect, a computer program product is provided, the computer program product comprising computer-executable instructions stored in a computer-readable storage medium; at least one processor of the device can read the computer from the computer-readable storage medium Execute the instruction, at least one processor executes the computer-executed instruction to cause the device to implement the first aspect or the reference signal sending method provided by any possible implementation manner of the first aspect, or execute the second aspect or any of the second aspect. A reference signal processing method provided by a possible implementation manner.

According to a ninth aspect, a communication system is provided. The communication system includes the transmitter provided in the fifth aspect and the receiver provided in the sixth aspect.

In the reference signal sending method, reference signal processing method and device provided by the embodiments of the present invention, the transmitter determines the first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1, and Its serving cell transmits the first reference signal sequence on at least one OFDM symbol using the first subcarrier interval f ₁ , so that the receiver receives the first reference signal sequence on at least one OFDM symbol, so that the reference signal sequence in the same serving cell is The signal sequences have high correlation, and the reference signal sequences of different serving cells have low correlation, thereby avoiding the interference of sending reference signals on the same time-frequency resources of different serving cells.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of a time-frequency resource for transmitting a reference signal;

FIG. 2 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a baseband subsystem according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

6 is a flowchart of a method for sending a reference signal according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a reference signal sequence provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of a time-frequency resource provided by an embodiment of the present invention;

FIG. 9 is a flowchart of another method for sending a reference signal provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a transmitter according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of another transmitter according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another transmitter according to an embodiment of the present invention;

13 is a schematic structural diagram of a receiver according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of another receiver according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of still another receiver according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Before introducing the present invention, the technical terms involved in the embodiments of the present invention are briefly introduced first.

The reference signal refers to a signal used to measure the channel quality or to perform coherent detection and data demodulation on the UE. The reference signal may mainly include: demodulation reference signal (English: demodulation reference signal, referred to as: DMRS), channel sounding reference signal (English: sounding reference signal, referred to as: SRS) and random access channel (English: random access channel, Abbreviation: RACH) preamble signal.

The reference signal sequence refers to the sequence code used when the reference signal is mapped on the resource unit. The above three reference signals, DMRS, SRS, and RACH preamble signals, are usually based on the Zadoff-Chu (ZC) sequence, and they are all directly mapped after generation. to the resource unit without any encoding processing.

The base sequence refers to a sequence for generating a reference signal sequence, and the reference signal sequence is a sequence generated by performing phase rotation on the base sequence in the frequency domain. For example, a cyclically expanded ZC sequence can be phase rotated in the frequency domain to generate a reference signal sequence. At this time, the cyclically expanded ZC sequence can be called the base sequence corresponding to the reference signal sequence. .

The root index of the base sequence refers to the root index used to generate the base sequence. Taking the ZC sequence as the base sequence as an example, if the root index is q1, then according to the root index q1 and the formula (1) of the ZC sequence, the generated sequence is It is called a ZC sequence, and the root index is the root index of the generated ZC sequence. In the formula, N _ZC is the length of the ZC sequence, and m ranges from 0 to N _ZC -1;

The generated sequence refers to the sequence of generating a base sequence, and the base sequence is a sequence generated by cyclic expansion or truncation of the generated sequence. For example, the generated sequence may include a Gold sequence and a ZC sequence. If the generated sequence is a Gold sequence, the reference signal sequence can be generated by a truncated sequence of the Gold sequence; or, the generated sequence is a ZC sequence, and the reference signal sequence is generated by cyclically expanding the ZC sequence and then adding phase rotation to the expanded sequence. Said q1 is the index of the ZC sequence.

FIG. 2 is a schematic structural diagram of a communication system to which an embodiment of the present invention is applied. Referring to FIG. 2 , the communication system includes a base station 101 and a user equipment 102 . In the embodiment of the present invention, if the transmitter is the user equipment 102 , the receiver is the base station 101 ; if the transmitter is the base station 101 , the receiver is the user equipment 102 .

Among them, the base station 101 has the scheduling function of the shared channel, and has the function of establishing scheduling based on the history of the packet data sent to the user equipment 102. Scheduling is that when multiple user equipments 102 share transmission resources, a mechanism is required to effectively allocate physical layer resources for statistical multiplexing gain. In addition, multiple user equipments 102 may be located in the serving cell of the base station 101, wherein the serving cell of the base station 101 may include one or more, for example, as shown in FIG. 2, the serving cell of the base station 101 may be two, namely Cell 1 and Cell 2.

The user equipment 102 has the function of transmitting and receiving data through the communication channel 103 established with the base station 101 . The user equipment 102 transmits or receives the shared channel according to the information sent through the scheduling control channel. In addition, the user equipment 102 may be a mobile station, a mobile phone, a computer, a portable terminal, etc., and the types of the user equipment 102 may be the same or different.

Data is received and sent between the base station 101 and the user equipment 102 through a communication channel. The communication channel can be a wireless communication channel, and in the wireless communication channel, there are at least a shared channel and a scheduling control channel. The shared channel is used for transmission and reception. The grouping is shared among multiple user equipments 102, and the scheduling control channel is used to transmit the allocation of the shared channel, the corresponding scheduling result, and the like.

FIG. 3 is a hardware structure diagram of a base station according to an embodiment of the present invention. As shown in FIG. 3 , the base station includes a baseband subsystem, an intermediate radio frequency subsystem, an antenna feeder subsystem, and some supporting structures (for example, a complete machine subsystem). ), in which the baseband subsystem is used to implement the operation and maintenance of the entire base station, realize signaling processing, radio resource principle, transmission interface to the packet core network, realize LTE physical layer, medium access control layer, L3 signaling, operation and maintenance main control function; the IF subsystem realizes the conversion between baseband signals, IF signals and RF signals, and realizes the demodulation of LTE wireless receiving signals and the modulation and power amplification of transmitted signals; the antenna-feeder subsystem includes an antenna connected to the radio frequency module of the base station and feeder, as well as the antenna and feeder of the GRS receiving card, are used to receive and transmit wireless air interface signals; the whole machine subsystem is the supporting part of the baseband subsystem and the intermediate frequency subsystem, providing structure, power supply and environmental monitoring functions.

The baseband subsystem can be shown in Figure 4: For example, the mobile phone needs to access the core network through the base station, and when accessing the Internet through the core network, the data of the Internet is transmitted to the baseband part through the interface between the core network and the base station. , the baseband part performs PDCP, RLC, MAC layer, coding, modulation and other processing, and then hands it over to the radio frequency part to transmit to the user equipment. The baseband and the radio frequency can be connected through the CPRI interface; in addition, the radio frequency part can currently be remoted through optical fibers, such as the remote RRU. Each step of the data transmission method in the embodiment of the present invention is implemented by radio frequency baseband, while the receiving and sending steps are implemented by an antenna (for example, an air interface).

The interface between the user equipment and the base station involved in the implementation of the present invention may be understood as an air interface for communication between the user equipment and the base station, or may also be referred to as a Uu interface.

FIG. 5 is a schematic structural diagram of a user equipment to which an embodiment of the present invention is applied. The user equipment may be a mobile phone, a tablet computer, a notebook computer, a super mobile personal computer, a netbook, a personal digital assistant, etc. The embodiment of the present invention uses a UT as a mobile phone as For illustration, FIG. 4 shows a block diagram of a partial structure of a mobile phone related to various embodiments of the present invention.

As shown in FIG. 5 , the mobile phone includes components such as a memory, a processor, a radio frequency (English: radio frequency, RF for short) circuit, and a power supply. Those skilled in the art can understand that the structure of the mobile phone shown in FIG. 5 does not constitute a limitation on the mobile phone, and may include more or less components than the one shown, or combine some components, or arrange different components.

The following is a detailed introduction to each component of the mobile phone in conjunction with Figure 5:

The memory can be used to store software programs and modules, and the processor executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory. The memory may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the mobile phone. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory and the like.

The processor is the control center of the mobile phone. It uses various interfaces and lines to connect various parts of the entire mobile phone, and executes various functions of the mobile phone by running or executing the software programs and/or modules stored in the memory and calling the data stored in the memory. functions and process data to monitor the phone as a whole. Optionally, the processor may include one or more processing units; preferably, the processor may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc. The demodulation processor mainly handles wireless communication.

RF circuits can be used to receive and transmit signals during sending and receiving of information or during a call. Typically, RF circuits include, but are not limited to, antennas, at least one amplifier, transceivers, couplers, low noise amplifiers, duplexers, and the like. In addition, RF circuits can also communicate with networks and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile Communications, General Packet Radio Service, Code Division Multiple Access, Wideband Code Division Multiple Access, Long Term Evolution, email, short message service, and the like.

The mobile phone also includes a power supply for supplying power to each component. Preferably, the power supply can be logically connected to the processor through a power management system, so that functions such as charging, discharging, and power consumption management are implemented through the power management system.

Although not shown, the mobile phone may further include an input unit, a display unit, a sensor module, an audio module, a WiFi module, a Bluetooth module, etc., which will not be repeated here.

FIG. 6 is a schematic flowchart of a method for sending a reference signal according to an embodiment of the present invention. Referring to FIG. 6 , the method includes the following steps.

Step 201: The transmitter determines a first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1; wherein, the _first subcarrier interval f1 refers to the frequency interval of two adjacent subcarrier peaks .

The first reference signal sequence can be obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , and the preset generation sequence includes a Gold sequence or a ZC sequence; or, the first reference signal sequence is obtained by the first reference signal sequence. The root index Q of the signal sequence corresponding to the base sequence is determined, and the root index Q is determined by the first subcarrier interval f ₁ , where the Q is an index of the ZC sequence.

The two methods for determining the first reference signal sequence are described below, and the details are as follows.

The first type, the first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , and the preset generation sequence includes a Gold sequence or a ZC sequence.

Wherein, when the transmitter determines the first reference signal sequence corresponding to the first sub-carrier interval f ₁ according to the first sub-carrier interval f ₁ , the transmitter may first determine the first reference signal sequence from the preset sub-carrier interval f ₁ The extraction interval of the first reference signal sequence is extracted from the sequence, and then the preset generation sequence is extracted according to the determined extraction interval, thereby obtaining the first reference signal sequence.

Optionally, when the transmitter determines the extraction interval for extracting the first reference signal sequence from the preset generation sequence according to the first subcarrier interval f ₁ , the transmitter may select the interval between the preset subcarrier interval and the extraction interval. In the corresponding relationship of , the decimation interval corresponding to the first subcarrier interval f ₁ is acquired, and the acquired decimation interval is determined as the decimation interval for extracting the first reference signal sequence from the preset generation sequence.

Or, if there is a reference subcarrier spacing, the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: f ₁ =f ₀ *2 ⁿ , where n is an integer greater than or equal to 0. The subcarrier interval f ₁ , when determining the extraction interval for extracting the first reference signal sequence from the preset generation sequence, the transmitter may determine 2 ⁿ according to the relationship between the first subcarrier interval f ₁ and the reference subcarrier interval f ₀ In order to extract the extraction interval of the first reference signal sequence from the preset generation sequence, the preset generation sequence is extracted every ²ⁿ , so as to obtain the base sequence of the first reference signal sequence, and then the base sequence of the first reference signal sequence can be obtained according to the first reference signal. The base sequence of the signal sequence generates the first reference signal sequence; at this time, the preset generation sequence may be the generation sequence of the reference signal sequence corresponding to the reference subcarrier interval f ₀ .

For example, if the first sub-carrier interval f ₁ is 30 kHz, and the reference sub-carrier interval f ₀ is 15 kHz, then f ₁ =f ₀ *2 ¹ , and the transmitter determines the decimation interval as f according to the relationship between f ₁ and f _{0 1} /f ₀ =2, if the generation sequence of the reference signal sequence corresponding to f ₀ is shown in (a) of FIG. 7 , specifically zc(0)～zc(10), when the length of the first reference signal sequence is At 12:00, the transmitter extracts every 2 from the cyclic expansion sequence of the generated sequences zc0 to zc10 according to the determined extraction interval, so that the base sequence of the first reference signal sequence obtained is shown in (b) in Figure 7 , specifically zc(0), zc(2), zc(4), zc(6), zc(8), zc(10), zc(1), zc(3), zc(5), zc( 7), zc(9), zc(0). Among them, zc(1), zc(3), zc(5), zc(7), zc(9), and zc(0) included in the first reference signal sequence base sequence are pairs of generated sequences zc(0)～ zc(10) Sequence codes extracted every 2 after cyclic extension.

It should be noted that the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: when f ₁ =f ₀ *2 ⁿ , the first reference signal sequence corresponds to the root index Q of the base sequence and the reference root index q The following relationship exists: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, which refers to the base sequence corresponding to the reference signal sequence corresponding to the reference subcarrier interval f ₀ .

The second type, the first reference signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ . Specifically, the method for the transmitter to determine the first reference signal sequence may include steps a to c.

Step a: Determine the root index Q of the base sequence corresponding to the first reference signal sequence according to the first subcarrier interval f ₁ .

Optionally, when the transmitter determines the root index Q of the base sequence corresponding to the first reference signal sequence according to the _first subcarrier interval f1, the transmitter may determine the length M of the _first reference signal sequence according to the first subcarrier interval f1 , obtain the root index Q of the base sequence corresponding to the first reference signal sequence from the first correspondence corresponding to the sequence group identifier; wherein the first correspondence includes at least the first subcarrier interval f ₁ and the length of the first reference signal sequence M, and a sequence root index corresponding to f ₁ and M, where the sequence root index is the root index of the base sequence corresponding to the first reference signal sequence.

For example, if the _first subcarrier interval f ₁ is 30 kHz and the length M of the first reference signal sequence is 36, then the transmitter can calculate In the first correspondence corresponding to the sequence group identifier shown in Table 1 below, the root index Q for obtaining the base sequence corresponding to the first reference signal sequence is 4.

Table 1

It should be noted that the interval in the first correspondence shown in Table 1 above refers to the preset subcarrier interval, the length refers to the length of the preset reference signal sequence, and the first correspondence shown in Table 1 above It is only exemplary, and the above Table 1 does not limit the embodiments of the present invention.

If the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: f ₁ =f ₀ *2 ⁿ , where n is an integer greater than or equal to 0, the first reference signal sequence corresponds to the root index Q of the base sequence and the reference The root index q has the following relationship: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, and the reference base sequence refers to the base corresponding to the reference signal sequence corresponding to the reference subcarrier interval f ₀ sequence.

Optionally, when the transmitter determines the root index Q of the base sequence corresponding to the first reference signal sequence according to the first subcarrier interval f1, the transmitter may _first determine the reference root index q, and then combine the _first subcarrier interval f1 with The root index Q is determined with reference to the relationship of the subcarrier spacing f ₀ .

Wherein, when the transmitter determines the reference root index q, the transmitter may determine the sequence group identifier of the reference signal sequence group used by its serving cell, and determine the reference root index q according to the sequence group identifier.

Specifically, the process for the transmitter to determine the sequence group identifier may be as follows: the transmitter receives synchronization information, the synchronization information includes the cell identifier of its serving cell, and the transmitter determines the total number of reference signal sequence groups included in the communication system according to the cell identifier and the communication system. , to determine the sequence group ID.

For example, if the sequence group identifier is the group number of the sequence group, the transmitter may determine the remainder of the group number of the sequence group relative to the total number of reference signal sequence groups included in the communication system as the reference root index q.

It should be noted that a communication system may include multiple reference signal sequence groups, a reference signal sequence group may include multiple reference signal sequences, and the cross-correlation between reference signal sequences in the same group is high, and different The cross-correlation between reference signal sequences within a group is low. For example, in the LTE system, the total number of reference signal sequence groups may be 30.

In addition, when the transmitter determines the reference root index q, the transmitter may also receive indication information sent by the receiver, and determine the reference root index q according to the indication information.

Specifically, when the transmitter receives the indication information, the transmitter can obtain the preset corresponding to the indication information from the stored correspondence between the preset indication information and the preset reference root index according to the received indication information. The reference root index is used, and the obtained preset reference root index is determined as the reference root index q.

For example, if the indication information received by the transmitter is information 1, the preset reference root index corresponding to information 1 is obtained as the index from the correspondence between the preset indication information and the preset reference root index shown in Table 2 below. 1, then the index 1 is determined as the reference root index q.

Table 2

Preset instructions Default reference root index Information 0 index 0 Information 1 index 1 Information 2 Index 2 ... ...

It should be noted that, the relationship between the preset indication information and the preset reference root index shown in the foregoing Table 2 is only exemplary, and the foregoing Table 2 does not limit the embodiment of the present invention.

It should be noted that the indication information sent by the receiver may be included in the system information, and the system information may be sent to the transmitter by broadcasting.

Step b: Generate a base sequence corresponding to the first reference signal sequence according to the determined root index Q.

Optionally, when the transmitter generates a base sequence corresponding to the first reference signal sequence according to the root index Q of the base sequence corresponding to the first reference signal sequence, if the base sequence corresponding to the first reference signal sequence is a ZC sequence, the transmitter can The root index Q, the base sequence corresponding to the first reference signal sequence is generated according to the following formula (2); in formula (2), N _ZC is the length of the ZC sequence, M is the length of the first reference signal sequence, and x _q [] is Referring to the ZC sequence corresponding to the root index q, mod is the symbol of the remainder. or,

If the base sequence corresponding to the first reference signal sequence is a Gold sequence, the transmitter uses the relationship between the root index Q of the base sequence corresponding to the first reference signal sequence and the reference root index q to generate the corresponding first reference signal sequence according to the following formula (3). Base sequence; in formula (3), L is the length of the Gold sequence, M is the length of the first reference signal sequence, and y[] is the initial Gold sequence.

r(i)=x _q [((2 ⁿ ) ² *i+k)modN _ZC ],0≤i<M,k=0,1,...,2 ⁿ -1 (2)

r(i)=y([(2 ⁿ ) ² *i+k]modL),0≤i＜M,k=0,1,...,2 ⁿ -1 (3)

It should be noted that when the first subcarrier interval f ₁ is equal to the reference subcarrier interval f ₀ , then n is equal to 0, and the root index Q of the base sequence corresponding to the first reference signal sequence is also equal to the reference root index q, so according to The base sequence corresponding to the first reference signal sequence generated in the above step b is the base sequence corresponding to the reference signal sequence corresponding to the reference root index q.

Step c: The transmitter generates a first reference signal sequence according to the base sequence corresponding to the first reference signal sequence.

After the transmitter generates the base sequence corresponding to the first reference signal sequence according to the above step b, the transmitter may perform a cyclic shift on the generated base sequence to obtain the corresponding first reference signal sequence.

Step 202: The transmitter transmits a first reference signal sequence to the receiver on at least one OFDM symbol using the _first subcarrier spacing f1 in its serving cell.

Step 203: The receiver receives, on at least one OFDM symbol, the first reference signal sequence sent by the transmitter in its serving cell using the _first subcarrier interval f1.

Specifically, after the transmitter determines the first reference signal sequence corresponding to the _first subcarrier interval f1, the transmitter may use the first subcarrier interval f1 in its serving cell to send the _first reference signal sequence on at least one OFDM symbol , so that the receiver can receive, on at least one OFDM symbol, the first reference signal sequence sent by the transmitter using the first subcarrier interval f ₁ .

Optionally, if the serving cell is configured with at least two subcarrier intervals, for example, the number of the at least two subcarrier intervals is 2, which are respectively the first subcarrier interval f ₁ and the second subcarrier interval f ₂ , transmit The transmitter uses the first subcarrier interval f ₁ and/or the second subcarrier interval f ₂ to send the reference signal sequence, and uses the first subcarrier interval f ₁ and/or the second subcarrier interval f ₂ to send data, if sending If the reference signal sequence is different from the subcarrier interval used when sending data, the transmitter can use the corresponding subcarrier interval to send the reference signal sequence and data through time division multiplexing. The time domain resources of the data are different.

For example, as shown in FIG. 8 , the transmitter uses the first subcarrier interval f ₁ to send the reference signal sequence, and uses the second subcarrier interval f ₂ to send data, and f ₂ =2f ₁ , then the transmitter is used to send the reference signal sequence The time-frequency resources can be shown in Figure 8.

In addition, if the serving cell uses at least two subcarrier intervals to transmit the reference signal sequence, for one reference signal sequence length, the base sequence group corresponding to the reference signal sequence group used by the serving cell includes at least base sequences.

Step 204: The receiver determines the second reference signal sequence, and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is based on the first subcarrier interval f ₁ definite.

The method for the receiver to determine the second reference signal sequence according to the _first subcarrier interval f1 is the same as the method for determining the first reference signal sequence according to the _first subcarrier interval f1 in the above step 201. For details, please refer to the above step 201. description, and details are not described herein again in this embodiment of the present invention.

After the receiver determines the second reference signal sequence, it can process the received first reference signal sequence according to the second reference signal sequence, and the specific processing process is: Correlation processing is performed on the second reference signal sequence, and the processing method is to multiply the elements corresponding to each of the two sequences and sum them up.

It should be noted that, when the reference signal sending method provided in the embodiment of the present invention is applied between the base station and the user equipment, in the above steps 201-204, when the user equipment acts as a transmitter, the base station can act as a receiver; or , when the user equipment acts as a receiver, the base station can act as a transmitter. Certainly, in practical applications, the transmitter or receiver may also be other devices, which are not specifically limited in this embodiment of the present invention.

Further, when the base station acts as a receiver, referring to FIG. 9 , before step 201 , the method further includes: steps 205 to 206 .

Step 205: The base station sends control signaling or high-layer signaling to the transmitter, where the control signaling or high-layer signaling includes frequency domain resource information for the reference signal sent by the transmitter.

Step 206: When the transmitter receives the control signaling or the high-level signaling, the transmitter may determine the frequency domain resource information for sending the reference signal according to the control signaling or the high-level signaling.

The frequency domain resource information includes time domain resource information and frequency domain resource information, the time domain resource can be an OFDM symbol, and the frequency domain resource can be a subcarrier interval, the number of interval subcarriers, etc., where the interval subcarrier number refers to the reference When the signal sequence is mapped in the frequency domain, the number of subcarriers spaced between adjacent elements.

Specifically, after the base station sends the control signaling or the high-level signaling to the transmitter, the transmitter can determine the frequency domain resource information for sending the reference signal according to the received control signaling or the high-level signaling.

For example, when the transmitter receives the control signaling or the high layer signaling, the transmitter may determine the first subcarrier interval f ₁ and at least one OFDM symbol for transmitting the reference signal according to the control signaling or the high layer signaling.

In the reference signal sending method provided by the embodiment of the present invention, the transmitter determines the first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1, and uses the first subcarrier in its serving cell The first reference signal sequence is sent on at least _one OFDM symbol at interval f1, so that the receiver receives the first reference signal sequence on at least one OFDM symbol, so that the reference signal sequences in the same serving cell have high correlation , the reference signal sequences of different serving cells have low correlation, thereby avoiding the interference of reference signals sent on the same time-frequency resources of different serving cells.

The foregoing mainly introduces the solutions provided by the embodiments of the present invention from the perspective of interaction between various network elements. It can be understood that, in order to implement the above functions, each network element, such as a transmitter and a receiver, includes corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that, in conjunction with the network elements and algorithm steps of each example described in the embodiments disclosed herein, the present invention can be implemented in hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In this embodiment of the present invention, functional modules of a transmitter, a receiver, etc. may be divided according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. . The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiment of the present invention is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

In the case where each functional module is divided according to each function, FIG. 10 shows a possible schematic structural diagram of the transmitter involved in the above embodiment. The transmitter 300 includes: a determining unit 301 and a sending unit 302 . The determining unit 301 is configured to execute the process 201 in FIG. 6 and the processes 201 and 206 in FIG. 9 ; the sending unit 302 is configured to execute the process 202 in FIG. 6 and FIG. 9 . Further, the transmitter may further include a receiving unit 303, wherein the receiving unit 303 is configured to receive control signaling or higher layer signaling sent by the receiver. All relevant contents of the steps involved in the foregoing method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

In the case of using an integrated unit, FIG. 11 shows a schematic diagram of a possible logical structure of the transmitter 310 involved in the above embodiment. The transmitter 310 includes: a processing module 312 and a communication module 313 . The processing module 312 is used to control and manage the actions of the transmitter, for example, the processing module 312 is used to perform the process 201 in FIG. 6, and the processes 201 and 206 in FIG. 9, and/or for the techniques described herein. other processes. The communication module 313 is used for communication with the receiver. The transmitter 310 may also include a storage module 311 for storing program codes and data of the transmitter.

The processing module 312 may be a processor or a controller, such as a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs computing functions, such as a combination comprising one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The communication module 313 may be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 311 may be a memory.

When the processing module 312 is a processor, the communication module 313 is a communication interface, and the storage module 311 is a memory, the transmitter involved in the embodiment of the present invention may be the device shown in FIG. 12 .

Referring to FIG. 12 , which is an example of a hardware structure of a transmitter, the transmitter 320 includes a processor 322 , a communication interface 323 , a memory 321 and a bus 324 . Wherein, the communication interface 323, the processor 322 and the memory 321 are connected to each other through the bus 324; , referred to as: EISA) bus and so on. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 12, but it does not mean that there is only one bus or one type of bus.

In the case where each functional module is divided according to each function, FIG. 13 shows a possible schematic structural diagram of the receiver involved in the above embodiment. The receiver 400 includes: a receiving unit 401 and a determining unit 402 . The receiving unit 401 is used for executing the process 203 in FIG. 6 and FIG. 9 ; the determining unit 402 is used for executing the process 204 in FIG. 6 and FIG. 9 . Further, the receiver may further include a sending unit 403, where the sending unit 403 is configured to perform the process 205 of sending control signaling or high-layer signaling to the transmitter in FIG. 9 . All relevant contents of the steps involved in the foregoing method embodiments can be cited in the functional descriptions of the corresponding functional modules, which will not be repeated here.

In the case of using an integrated unit, FIG. 14 shows a schematic diagram of a possible logical structure of the receiver 410 involved in the above embodiment. The receiver 410 includes: a processing module 412 and a communication module 413 . The processing module 412 is used to control and manage the actions of the receiver, eg, the processing module 412 is used to perform the process 204 in FIGS. 6 and 9, and/or other processes for the techniques described herein. The communication module 413 is used for communication with the receiver. The transmitter 410 may also include a storage module 411 for storing program codes and data of the receiver.

The processing module 412 may be a processor or a controller, such as a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that performs computing functions, such as a combination comprising one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like. The communication module 413 may be a transceiver, a transceiver circuit, a communication interface, or the like. The storage module 411 may be a memory.

When the processing module 412 is a processor, the communication module 413 is a communication interface, and the storage module 411 is a memory, the receiver involved in this embodiment of the present invention may be the device shown in FIG. 15 .

Referring to FIG. 15 , which is an example of a hardware structure of a receiver, the receiver 420 includes a processor 422 , a communication interface 423 , a memory 421 and a bus 424 . Wherein, the communication interface 423, the processor 422 and the memory 421 are connected to each other through a bus 424; the bus 424 may be a PCI bus or an EISA bus or the like. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 15, but it does not mean that there is only one bus or one type of bus.

In another embodiment of the present invention, a computer-readable storage medium is also provided, where computer-executable instructions are stored in the computer-readable storage medium. When at least one processor of a device executes the computer-executable instructions, the device executes the above-mentioned computer-executable instructions. The steps of the transmitter in the reference signal sending method provided in FIG. 6 or FIG. 9 may be performed, or the steps of the receiver in the above-mentioned reference signal sending method provided in FIG. 6 or FIG. 9 are performed.

In another embodiment of the present invention, a computer program product is also provided, the computer program product includes computer-executable instructions stored in a computer-readable storage medium; at least one processor of the device can be obtained from a computer-readable storage medium. Read the storage medium to read the computer-executable instructions, and at least one processor executes the computer-executable instructions to cause the device to implement the steps of the transmitter in the reference signal sending method provided in FIG. 6 or FIG. Steps of the receiver in the provided reference signal transmission method.

In another embodiment of the present invention, a communication system is also provided, the communication system includes the transmitter shown in any one of the above-mentioned FIG. 10-FIG. 12, and the receiver shown in any one of FIG. 13-FIG. 15; wherein , the transmitter is configured to perform the steps of the transmitter in the reference signal sending method provided in FIG. 6 or FIG. 9 , and the receiver is configured to perform the steps of the transmitter and receiver in the reference signal sending method provided in FIG. 6 or FIG. 9 .

In the communication system provided by the embodiment of the present invention, the transmitter determines the first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1, and uses the first subcarrier interval f in its serving cell _1. The first reference signal sequence is sent on at least one OFDM symbol, so that the receiver receives the first reference signal sequence on at least one OFDM symbol, so that the reference signal sequences in the same serving cell have high correlation and different The reference signal sequences of the serving cells have low correlation, thereby avoiding the interference of the reference signals sent on the same time-frequency resources of different serving cells.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (29)

1. A method for sending a reference signal, wherein the method comprises: The transmitter determines the first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1; wherein, the _first subcarrier interval f1 refers to the frequency interval of two adjacent subcarrier peaks; The transmitter transmits the first reference signal sequence on at least one OFDM symbol in its serving cell using the _first subcarrier spacing f1. 2. The method according to claim 1, wherein The first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ ; wherein, the preset generation sequence includes a Gold sequence or a ZC sequence; or, The first reference signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ . 3 . The method according to claim 2 , wherein if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: the f ₁ =f ₀ *2 ⁿ , the n is an integer greater than or equal to 0, then the root index Q of the base sequence corresponding to the first reference signal sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is a reference the root index of the base sequence, where the reference base sequence refers to the base sequence corresponding to the reference signal sequence corresponding to the reference subcarrier interval f ₀ ; The first reference signal sequence corresponding to the first subcarrier interval f ₁ is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , specifically: according to the first subcarrier interval f ₁ The relationship with the reference subcarrier interval f ₀ is obtained by extracting every 2 ⁿ of the preset generation sequence; wherein, the preset generation sequence is the reference subcarrier interval f ₀ corresponding to Generation of reference signal sequences. 4. The method according to claim 3, wherein the method further comprises: determining, by the transmitter, a sequence group identifier of a reference signal sequence group used by the serving cell; The transmitter determines the reference root index q according to the sequence group identifier. 5. The method according to claim 3, wherein the method further comprises: The transmitter receives the indication information sent by the receiver, and determines the reference root index q according to the indication information. 6. The method according to claim 4, wherein the method further comprises: The transmitter obtains the base corresponding to the first reference signal sequence from the first correspondence corresponding to the sequence group identifier according to the first subcarrier interval f ₁ and the length M of the first reference signal sequence. The root index Q of the sequence; wherein, the first correspondence includes at least the first subcarrier interval f ₁ , the length M of the first reference signal sequence, and the sequence corresponding to the f ₁ and the M A root index, where the sequence root index is the root index of the base sequence corresponding to the first reference signal sequence. 7. The method according to any one of claims 1-6, wherein if the receiver is a base station, the transmitter determines that the _first subcarrier interval f1 corresponds to the _first subcarrier interval f1 according to the first subcarrier interval f1 Before the first reference signal sequence, the method further includes: The transmitter receives control signaling or high-level signaling sent by the base station, where the control signaling or the high-level signaling includes frequency domain resource information of the reference signal sent by the transmitter; The transmitter determines the first subcarrier interval f ₁ according to the frequency domain resource information. 8. A reference signal processing method, wherein the method comprises: The receiver receives, on at least one OFDM symbol, a first reference signal sequence corresponding to the _first subcarrier interval f1 sent by the transmitter in its serving cell using the _first subcarrier interval f1; The first reference signal sequence corresponding to the _first subcarrier interval f1 is determined by the transmitter according to the _first subcarrier interval f1. 9. The method according to claim 8, wherein the method further comprises: The receiver determines a second reference signal sequence, and processes the received first reference signal sequence according to the determined second reference signal sequence; wherein the second reference signal sequence is based on the first subcarrier _The interval f1 is determined. 10. The method of claim 9, wherein: The first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ ; wherein, the preset generation sequence includes a Gold sequence or a ZC sequence; or, The first reference signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ . 11 . The method according to claim 10 , wherein if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: the f ₁ =f ₀ *2 ⁿ , the n is an integer greater than or equal to 0, then the root index Q of the base sequence corresponding to the first reference signal sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is a reference the root index of the base sequence, where the reference base sequence refers to the base sequence corresponding to the reference signal sequence corresponding to the reference subcarrier interval f ₀ ; The first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , specifically: according to the first subcarrier interval f ₁ and the reference subcarrier interval f ₀ The relationship is obtained by extracting every 2 ⁿ of the preset generation sequence; wherein, the preset generation sequence is the generation sequence of the reference signal sequence corresponding to the reference subcarrier interval f ₀ . 12. The method of claim 11, wherein the method further comprises: The receiver sends indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information. 13. The method according to any one of claims 8-12, wherein if the receiver is a base station, the method further comprises: The base station sends control signaling or high-level signaling to the transmitter, where the control signaling or the high-level signaling includes frequency domain resource information of the reference signal sent by the transmitter, so that the transmitter can The frequency domain resource information is used to determine the first subcarrier interval f ₁ . 14. A transmitter, characterized in that the transmitter comprises: The determining unit is configured to determine the first reference signal sequence corresponding to the _first subcarrier interval f1 according to the _first subcarrier interval f1; wherein, the _first subcarrier interval f1 refers to the difference between the peak values of two adjacent subcarriers frequency interval; A sending unit, configured to use the first subcarrier interval f ₁ to send the first reference signal sequence on at least one OFDM symbol in its serving cell. 15. The transmitter of claim 14, wherein The first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ ; wherein, the preset generation sequence includes a Gold sequence or a ZC sequence; or, The first reference signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ . 16 . The transmitter according to claim 15 , wherein, if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: the f ₁ =f ₀ *2 ⁿ , the n is an integer greater than or equal to 0, then the root index Q of the base sequence corresponding to the first reference signal sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, where the reference base sequence refers to the base sequence corresponding to the reference signal sequence corresponding to the reference subcarrier interval f ₀ ; The first reference signal sequence corresponding to the first subcarrier interval f ₁ is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , specifically: according to the first subcarrier interval f ₁ The relationship with the reference subcarrier interval f ₀ is obtained by extracting every 2 ⁿ of the preset generation sequence; wherein, the preset generation sequence is the reference subcarrier interval f ₀ corresponding to Generation of reference signal sequences. 17. The transmitter according to claim 16, wherein the determining unit is further configured to: determining the sequence group identifier of the reference signal sequence group used by the serving cell; The reference root index q is determined according to the sequence group identifier. 18. The transmitter of claim 16, wherein the transmitter further comprises: a receiving unit, configured to receive the indication information sent by the receiver; The determining unit is further configured to determine the reference root index q according to the indication information. 19. The transmitter according to claim 17, wherein the determining unit is further configured to According to the first subcarrier interval f ₁ and the length M of the first reference signal sequence, obtain the root index of the base sequence corresponding to the first reference signal sequence from the first correspondence corresponding to the sequence group identifier Q; wherein, the first correspondence includes at least the first subcarrier interval f ₁ , the length M of the first reference signal sequence, and the sequence root index corresponding to the f ₁ and the M, the The sequence root index is the root index of the base sequence corresponding to the first reference signal sequence. 20. The transmitter according to any one of claims 14-19, wherein if the receiver is a base station, a receiving unit, further configured to receive control signaling or high-level signaling sent by the base station, where the control signaling or the high-level signaling includes frequency domain resource information of the reference signal sent by the transmitter; The determining unit is further configured to determine the first subcarrier interval f ₁ according to the frequency domain resource information. 21. A receiver, characterized in that the receiver comprises: a receiving unit, configured to receive, on at least one OFDM symbol, a first reference signal sequence corresponding to the _first subcarrier interval f1 sent by the transmitter in its serving cell using the _first subcarrier interval f1; The first reference signal sequence corresponding to the _first subcarrier interval f1 is determined by the transmitter according to the _first subcarrier interval f1. 22. The receiver of claim 21, wherein the receiver further comprises: a determining unit, configured to determine a second reference signal sequence, and process the received first reference signal sequence according to the determined second reference signal sequence; wherein, the second reference signal sequence is The carrier spacing f ₁ is determined. 23. The receiver of claim 22, wherein The first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ ; wherein, the preset generation sequence includes a Gold sequence or a ZC sequence; or, The first reference signal sequence is determined by the root index Q of the base sequence corresponding to the first reference signal sequence, and the root index Q is determined by the first subcarrier interval f ₁ . 24 . The receiver according to claim 23 , wherein, if the relationship between the first subcarrier spacing f ₁ and the reference subcarrier spacing f ₀ is: the f ₁ =f ₀ *2 ⁿ , the n is an integer greater than or equal to 0, then the root index Q of the base sequence corresponding to the first reference signal sequence has the following relationship with the reference root index q: Q=q(2 ⁿ ) ² ; wherein, the reference root index q is the root index of the reference base sequence, where the reference base sequence refers to the base sequence corresponding to the reference signal sequence corresponding to the reference subcarrier interval f ₀ ; The first reference signal sequence is obtained by extracting a preset generation sequence according to the first subcarrier interval f ₁ , specifically: according to the first subcarrier interval f ₁ and the reference subcarrier interval f ₀ The relationship is obtained by extracting every 2 ⁿ of the preset generation sequence; wherein, the preset generation sequence is the generation sequence of the reference signal sequence corresponding to the reference subcarrier interval f ₀ . 25. The receiver of claim 24, wherein the receiver further comprises: A sending unit, configured to send indication information to the transmitter, so that the transmitter determines the reference root index q according to the indication information. 26. The receiver according to any one of claims 21-25, wherein if the receiver is a base station, a sending unit, further configured to send control signaling or high-layer signaling to the transmitter, where the control signaling or the high-layer signaling includes frequency domain resource information of the reference signal sent by the transmitter, so that the transmitter can transmit The computer determines the first subcarrier interval f ₁ according to the frequency domain resource information. 27. A transmitter, characterized in that the transmitter comprises a memory, a processor, a system bus and a communication interface, wherein code and data are stored in the memory, and the processor and the memory are connected through the system bus , the processor runs the code in the memory to cause the transmitter to execute the reference signal sending method according to any one of claims 1-7. 28. A receiver comprising a memory, a processor, a system bus and a communication interface, wherein code and data are stored in the memory, the processor and the memory are connected through the system bus, the processing The receiver runs code in the memory to cause the receiver to perform the reference signal processing method of any one of claims 8-13 above. 29. A communication system comprising the transmitter of claim 27 above, and the receiver of claim 28 above.

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