CN106817331A - The method and apparatus that signal of communication is processed in communication system - Google Patents

Abstract

Embodiments of the present invention provide a method and device for processing communication signals in a communication system. The method includes: performing discrete Fourier transform (DFT) processing on input data to obtain a DFT data sequence; combining the DFT data sequence with the pilot sequence Orthogonal frequency division multiplexing is performed within the same symbol. The embodiment of the present invention can reduce the peak-to-average power ratio during information transmission in the communication system, and can reduce the transmission overhead of the pilot frequency.

Description

Method and device for processing communication signals in communication system

technical field

The embodiments of the present invention relate to the communication field, and in particular to a method and device for processing communication signals in a communication system.

Background technique

In wideband communication systems, in order to combat frequency-domain selective fading caused by multipath, the entire system bandwidth is generally divided into multiple sub-bands, and each sub-band can be considered as flat fading, so that the receiver can use a simple linear frequency domain equalizer. Frequency domain equalization, and achieve high receiving performance. A system that divides a broadband signal into multiple narrowband signals in the frequency domain for transmission and reception is called a multi-carrier system. An Orthogonal Frequency Division Multiple Access ("OFDMA" for short) system is a typical multi-carrier system. Although the multi-carrier system reduces the complexity of the equalization performed by the receiver, it has a serious disadvantage, that is, a relatively high peak-to-average power ratio (Peak to Average Power Ratio, referred to as "PAPR"). PAPR will seriously affect the efficiency of the power amplifier. When the PAPR is low, it can ensure that the operating point of the power amplifier is always in the optimal amplification range, and the efficiency of the power amplifier is also optimal; when the PAPR is high, in order to ensure that the peak signal can be amplified normally, the working Back off the point, that is, reduce the operating point of the power amplifier, which will also reduce the efficiency of the power amplifier, and cause the average power of the transmitted signal to decrease, thereby reducing the transmission distance of the wireless signal.

In the next generation wireless communication system, since the spectrum resource of the low frequency band has basically been exhausted, the wireless system may use the wireless spectrum of a higher frequency point. The use of high frequency will cause the wireless channel to fade greatly. In order to provide signal coverage quality, it is required to consider the PAPR of the transmitted signal when transmitting the signal to improve the quality of the transmitted signal.

Contents of the invention

The invention provides a method and device for processing communication signals in a communication system, which can solve the problem of high peak-to-average power ratio when transmitting information in the communication system.

In a first aspect, a method for processing communication signals in a communication system is provided, the method comprising: performing discrete Fourier transform (Discrete Fourier Transform, "DFT" for short) processing on input data to obtain a DFT data sequence; Orthogonal frequency division multiplexing is performed on the DFT data sequence and the pilot sequence in the same symbol.

According to the method for processing communication signals in the communication system of the embodiment of the present invention, the data sequence processed by discrete Fourier transform and the pilot sequence are subjected to OFDM in the same symbol, which can solve the problem of transmission in the communication system. It solves the problem of high peak-to-average power ratio during information transmission, and can reduce the transmission overhead of the pilot.

With reference to the first aspect, in an implementation manner of the first aspect, performing OFDM on the DFT data sequence and the pilot sequence in the same symbol includes: combining the pilot sequence according to The method of distributed mapping is mapped to K subcarriers among the M subcarriers in the symbol, K is a positive integer less than or equal to M-N, M is the number of effective subcarriers in the symbol, and N is the The number of DFT processing points; mapping the DFT data sequence to N subcarriers different from the K subcarriers among the M subcarriers in the symbol.

In combination with the first aspect and its above implementation manner, in another implementation manner of the first aspect, the mapping of the DFT data sequence to N subcarriers different from the K subcarriers among the M subcarriers in the symbol On the carrier, it includes: performing phase rotation on the DFT data sequence and then mapping it to the N subcarriers, where the phase rotation factor of the phase rotation is S is the serial number of the subcarrier, and T is the number of Inverse Fast Fourier Transform ("IFFT" for short) points in the communication system.

With reference to the first aspect and the above implementation manners, in another implementation manner of the first aspect, the method further includes: sending sampling point shift indication information, the sampling point shift indication information indicating that the DFT data has been Phase rotation processing.

In combination with the first aspect and the above-mentioned implementation manners, in another implementation manner of the first aspect, the mapping of the pilot sequence to K subcarriers in the M subcarriers in the symbol according to a distributed mapping method , comprising: mapping the pilot sequence to the K subcarriers in a manner of mapping every L subcarriers to a subcarrier, where L is a positive integer greater than or equal to 1.

With reference to the first aspect and the foregoing implementation manners thereof, in another implementation manner of the first aspect, the value of N is M/2.

In a second aspect, a method for processing a communication signal in a communication system is provided, including: converting a received signal into a frequency domain signal, the received signal including a discrete Fourier transform (Discrete Fourier Transform, referred to as "DFT") data sequence and pilot sequence, the DFT data sequence is a data sequence after DFT processing, the DFT data sequence and the pilot sequence are orthogonal frequency division multiplexing in the same symbol; according to the pilot sequence, determine Channel estimation information: performing demodulation processing on the DFT data sequence according to the channel estimation information.

With reference to the second aspect, in an implementation manner of the second aspect, the DFT data sequence and the pilot sequence are orthogonally frequency-division multiplexed within the same symbol, including: the pilot sequence is mapped according to distributed is mapped on K subcarriers among the M subcarriers in the symbol, K is a positive integer less than or equal to M-N, M is the number of effective subcarriers in the symbol, and N is the number of subcarriers processed by the DFT Number of points; the DFT data sequence is mapped on N subcarriers different from the K subcarriers among the M subcarriers in the symbol.

In combination with the second aspect and the above implementation manners, in another implementation manner of the second aspect, the DFT data sequence is mapped on N subcarriers different from the K subcarriers among the M subcarriers in the symbol, Including: the DFT data sequence is phase-rotated and then mapped to the N subcarriers, wherein the phase rotation factor of the phase rotation is Wherein, S is the serial number of the subcarrier, and T is the Inverse Fast Fourier Transform (Inverse Fast FourierTransform, referred to as "IFFT") or Inverse Discrete Fourier Transform (Inverse Discrete FourierTransform, referred to as "IDFT") in the communication system. ”) points.

Wherein, the demodulating the DFT data sequence according to the channel estimation information includes:

According to the channel estimation information, perform frequency domain equalization processing on the DFT data sequence to obtain a frequency domain equalized data sequence; perform N-point discrete Fourier inverse transform on the data sequence after performing phase compensation on the frequency domain equalized data sequence IDFT obtains IDFT data sequence, wherein, the phase compensation factor of described phase compensation is Demodulate the IDFT data sequence.

With reference to the second aspect and the above implementation manners, in another implementation manner of the second aspect, the method further includes: receiving sampling point shift indication information, the sampling point shift indication information indicating the DFT data sequence Phase rotation processing is performed.

In combination with the second aspect and the above implementation manners, in another implementation manner of the second aspect, the pilot sequence is mapped on K subcarriers among the M subcarriers in the symbol in a distributed mapping manner, including : The pilot sequence is mapped to the K subcarriers in such a manner that every L subcarriers are mapped to a subcarrier, and L is a positive integer greater than or equal to 1.

With reference to the second aspect and the foregoing implementation manners thereof, in another implementation manner of the second aspect, the value of N is M/2.

In a third aspect, a method for processing communication signals in a communication system is provided, including: performing N-point discrete Fourier transform (Discrete Fourier Transform, "DFT") processing on the first data to obtain the first DFT data sequence , the first data corresponds to the first group of user equipment, wherein, N is less than M, M is the number of effective subcarriers included in the system bandwidth of the communication system, and M is a positive integer greater than 1; the second Perform K-point DFT processing on the data to obtain a second DFT data sequence, the second data corresponds to the second group of user equipment, K is less than or equal to M-N; the first DFT data sequence and the second DFT data sequence Orthogonal frequency division multiplexing is performed within the same symbol.

According to the method for processing communication signals in a communication system according to an embodiment of the present invention, the data of two groups of user equipments are subjected to independent discrete Fourier transform processing and subcarrier mapping, so as to ensure that two groups of users can transmit independently, thus, each group of users can Independently perform multiple-input multiple-output processing to obtain diversity, multiplexing, and array gain, and can reduce the peak-to-average power ratio when transmitting information in a communication system.

With reference to the third aspect, in an implementation manner of the third aspect, performing OFDM on the first DFT data sequence and the second DFT data sequence in the same symbol includes: The first DFT data sequence is mapped to N subcarriers in the M subcarriers in the symbol in a distributed mapping manner; the second DFT data sequence is mapped to the M subcarriers in the symbol except K subcarriers in other subcarriers other than the N subcarriers.

In conjunction with the third aspect and the above-mentioned implementation manners, in another implementation manner of the third aspect, the mapping of the second DFT data sequence to the M subcarriers in the symbol except the N subcarriers K subcarriers in the other subcarriers, including: performing phase rotation on the second DFT data sequence and then mapping to the other subcarriers in the M subcarriers in the symbol except the N subcarriers On K subcarriers; wherein, the phase rotation factor of the phase rotation is S is the serial number of the subcarrier, and T is the number of Inverse Fast Fourier Transform ("IFFT" for short) points in the communication system.

With reference to the third aspect and the above-mentioned implementation manners, in another implementation manner of the third aspect, the method further includes: sending sampling point shift indication information, the sampling point shift indication information indicating that the second DFT data The sequence is phase rotated.

In combination with the third aspect and the above-mentioned implementation manners, in another implementation manner of the third aspect, the mapping of the first DFT data sequence to N of the M subcarriers in the symbol is performed in a distributed mapping manner. on subcarriers, including: mapping the first DFT data sequence to the N subcarriers in such a manner that every L subcarriers are mapped to one subcarrier, where L is a positive integer greater than or equal to 1.

In conjunction with the third aspect and the above-mentioned implementation manners, in another implementation manner of the third aspect, the sending the sampling point shift indication information includes: sending Physical Downlink Control Channel PDCCH information, and the PDCCH information includes the sampling point Shift instructions.

With reference to the third aspect and the above-mentioned implementation manners, in another implementation manner of the third aspect, the PDCCH information further includes at least one of the following information: modulation and coding strategy level information, user equipment grouping information, data in DFT location information in .

With reference to the third aspect and the foregoing implementation manners thereof, in another implementation manner of the third aspect, the value of N is M/2.

In a fourth aspect, a method for processing a communication signal in a communication system is provided, including: converting a received signal to obtain a frequency domain signal, the received signal including a discrete Fourier transform (Discrete FourierTransform, referred to as "DFT") data sequence , the DFT data sequence includes the first DFT data sequence after the first data corresponding to the first group of user equipment is processed by N-point DFT and the second data corresponding to the second group of user equipment is processed by K-point DFT The second DFT data sequence, the first DFT data sequence and the second DFT data sequence are orthogonal frequency division multiplexing within the same symbol, wherein, N is less than M, K is less than or equal to M-N, and M is the The number of effective subcarriers included in the system bandwidth of the communication system; and demodulating the DFT data sequence according to channel estimation information.

With reference to the fourth aspect, in an implementation manner of the fourth aspect, the first DFT data sequence and the second DFT data sequence are used for orthogonal frequency division multiplexing within the same symbol, including: the first DFT The data sequence is mapped on the N subcarriers in the M subcarriers in the symbol according to the distributed mapping method; the second DFT data sequence is mapped in the M subcarriers in the symbol except for the N subcarriers K subcarriers in the other subcarriers.

With reference to the fourth aspect and the above-mentioned implementation manners, in another implementation manner of the fourth aspect, the second DFT data sequence is mapped to other subcarriers except the N subcarriers among the M subcarriers in the symbol K subcarriers in the subcarriers include: the second DFT data sequence is phase-rotated and then mapped to the N subcarriers, wherein the phase rotation factor of the phase rotation is Wherein, S is the serial number of the subcarrier, and T is the number of Inverse Discrete Fourier Transform (Inverse Discrete Fourier Transform, "IDFT" for short) points or Inverse Fast Fourier Transform (Inverse Fast Fourier Transform, short for "IDFT") points in the communication system. is "IFFT") points.

Wherein, the demodulating the DFT data sequence according to the channel estimation information includes:

According to the channel estimation information, performing frequency-domain equalization processing on the second DFT data sequence to obtain a frequency-domain equalized data sequence, and performing K-point discrete Fourier transform on the data sequence after performing phase compensation on the frequency-domain equalized data sequence The inverse transformation IDFT obtains the IDFT data sequence, wherein the phase compensation factor of the phase compensation is Demodulate the IDFT data sequence.

With reference to the fourth aspect and its above-mentioned implementation manners, in another implementation manner of the fourth aspect, the method further includes: receiving sampling point shift indication information, the sampling point shift indication information indicating that the second DFT data The sequence is phase rotated.

In combination with the fourth aspect and its above-mentioned implementation manners, in another implementation manner of the fourth aspect, the first DFT data sequence is mapped to N subcarriers among the M subcarriers in the symbol in a distributed mapping manner , including: mapping the first DFT data sequence to the N subcarriers in a manner that every L subcarriers are mapped to a subcarrier, where L is a positive integer greater than or equal to 1.

In combination with the fourth aspect and the above-mentioned implementation manners of the fourth aspect, in another implementation manner of the fourth aspect, the receiving the sampling point shift indication information includes: receiving physical downlink control channel PDCCH information, and the PDCCH information includes the sampling point Shift instructions.

With reference to the fourth aspect and the above-mentioned implementation manners, in another implementation manner of the fourth aspect, the PDCCH information further includes at least one of the following information: modulation and coding strategy level information, user equipment grouping information, data in DFT location information as described in .

With reference to the fourth aspect and the foregoing implementation manners, in another implementation manner of the fourth aspect, the value of N is M/2.

In a fifth aspect, an apparatus is provided, including: a processor and a memory, the processor and the memory are connected through a bus system, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, The device is made to execute the method in the above first aspect or any possible implementation manner of the first aspect.

In a sixth aspect, a device is provided, including: a processor, a memory, and a receiver, the processor, the memory, and the receiver are connected through a bus system, the memory is used to store instructions, and the processor uses The instruction stored in the memory is executed to control the receiver to receive a signal, so that the device executes the method in the above second aspect or any possible implementation manner of the second aspect.

In a seventh aspect, an apparatus is provided, including: a processor and a memory, the processor and the memory are connected through a bus system, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, Make the device execute the third aspect or the method in any possible implementation manner of the third aspect.

In an eighth aspect, a device is provided, including: including: a processor, a memory, and a receiver, the processor, the memory, and the receiver are connected through a bus system, the memory is used to store instructions, and the The processor is configured to execute the instructions stored in the memory, so as to control the receiver to receive the signal, so that the device executes the method in the above fourth aspect or any possible implementation manner of the fourth aspect.

A ninth aspect provides a computer-readable medium for storing a computer program, where the computer program includes instructions for executing the method in the first aspect or any possible implementation manner of the first aspect.

A tenth aspect provides a computer-readable medium for storing a computer program, where the computer program includes instructions for executing the method in the second aspect or any possible implementation manner of the second aspect.

In an eleventh aspect, a computer-readable medium is provided for storing a computer program, and the computer program includes instructions for executing the method in the third aspect or any possible implementation manner of the third aspect.

A twelfth aspect provides a computer-readable medium for storing a computer program, where the computer program includes instructions for executing the method in the fourth aspect or any possible implementation manner of the fourth aspect.

Description of drawings

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

FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present invention;

FIG. 2 is a schematic diagram of an internal structure of a base station and a user equipment in the application scenario described in FIG. 1;

3 is a schematic flowchart of a method for processing communication signals in a communication system according to an embodiment of the present invention;

FIG. 4 is a schematic flowchart of a method for processing communication signals in a communication system according to a specific embodiment of the present invention;

5 is a schematic flowchart of a method for processing communication signals in a communication system according to another embodiment of the present invention;

FIG. 6 is a schematic flowchart of a method for processing communication signals according to another specific embodiment of the present invention;

Fig. 7 is a schematic block diagram of a device according to an embodiment of the present invention;

Fig. 8 is a schematic block diagram of a device according to another embodiment of the present invention;

Fig. 9 is a schematic block diagram of a device according to yet another embodiment of the present invention;

Fig. 10 is a schematic block diagram of a device according to yet another embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various suitable communication systems, for example: Long Term Evolution (Long Term Evolution, referred to as “LTE”) system, LTE Frequency Division Duplex (Frequency Division Duplex, referred to as “LTE”) system FDD") system, LTE Time Division Duplex (Time Division Duplex, referred to as "TDD"), or future networks, such as 5G, D2D (Device to Device) system, M2M (Machine to Machine) system, etc.

It should be understood that, in this embodiment of the present invention, a user equipment (User Equipment, referred to as "UE") may also be called a terminal equipment (Terminal Equipment), a mobile station (Mobile Station, referred to as "MS"), a mobile terminal ( Mobile Terminal), etc., the user equipment can communicate with one or more core networks via a radio access network (Radio Access Network, referred to as "RAN"), for example, the user equipment can be a mobile phone (or called "cellular" telephone), computers with mobile terminals, etc., such as portable, pocket, handheld, computer built-in or vehicle-mounted mobile devices, as well as terminal equipment in the future 5G network or the future evolution of the Public Land Mobile Network (Public Land Mobile Network) Mobile Network, referred to as "PLMN") in the terminal equipment.

It should also be understood that, in the embodiment of the present invention, the base station may be an evolved base station (evolved Node B, referred to as "eNB" or "e-NodeB") in the radio access network of the LTE system, or a future communication system The base station in the radio access network is not limited in the present invention.

Fig. 1 is a schematic diagram of an application scenario of an embodiment of the present invention. As shown in FIG. 1 , a base station communicates with multiple user equipments (UE1-UE3) through wireless signals. Usually, wireless signals used for communication are sent and received in a certain modulation mode, which can be divided into two categories: single-carrier modulation and multi-carrier modulation.

It should be noted that the application scenario shown in FIG. 1 only shows a situation where there is one base station (isolated base station). But the present invention is not limited thereto. The base station may also have adjacent base stations and user equipments that transmit services on the same or different time-frequency resources, and each base station may also include other numbers of user equipments within the coverage area.

Optionally, the wireless communication system where the base station and the user equipment are located in FIG. 1 may also include other network entities such as a network controller and a mobility management entity, to which the embodiment of the present invention is not limited.

FIG. 2 is a schematic diagram of internal structures of a base station and user equipment in the application scenario shown in FIG. 1 . As shown in Figure 2, the base station may include an antenna or an antenna array, a duplexer, a transmitter (Transmitter, referred to as "TX"), a receiver (Receiver, referred to as "RX") (TX and RX may be collectively referred to as a transceiver TRX), and the baseband processing part. Wherein, the duplexer is used to enable the antenna or antenna array to be used for both sending and receiving signals. TX is used to realize the conversion between radio frequency signal and baseband signal, usually TX can include power amplifier (Power Amplifier, referred to as "PA"), digital-to-analog converter (Digital to Analog Converter, referred to as "DAC") and frequency converter , PA generally works in a certain linear range. When the input signal amplitude changes too much, it will make the PA work in the nonlinear range and reduce the efficiency of the PA. Usually, the RX can include a low-noise amplifier (Low-Noise Amplifier, referred to as " LNA"), Analog to Digital Converter (Analog to Digital Converter, referred to as "ADC") and frequency converter. The baseband processing part is used to realize the processing of the transmitted or received signal, such as layer mapping, precoding, modulation/demodulation, coding/coding, etc., and perform physical control channel, physical data channel, physical broadcast channel, reference signal, etc. Separate processing.

In an example, the base station may further include a control part for performing multi-user scheduling and resource allocation, pilot scheduling, user physical layer parameter configuration, and the like.

The UE may include an antenna, a duplexer, TX and RX (TX and RX may be collectively referred to as a transceiver TRX), and a baseband processing part. As shown in Figure 2, the UE has a single antenna. It should be understood that a UE may also have multiple antennas (ie, antenna arrays). Among them, the duplexer enables the antenna or antenna array to be used for both transmitting and receiving signals. TX is used to realize the conversion between radio frequency signal and baseband signal. Usually TX can include PA, DAC and frequency converter. Since the UE side is powered by batteries, it is more sensitive to the power amplifier efficiency of PA. Usually RX can include LNA, ADC and inverter. The baseband processing part is used to realize the processing of the transmitted or received signal, such as layer mapping, precoding, modulation/demodulation, encoding/decoding and so on. And separate processing is performed on the physical control channel, the physical data channel, the physical broadcast channel, and the reference signal.

In an example, the UE may further include a control part, configured to request uplink physical resources, calculate channel state information (Channel State Information, "CSI" for short) corresponding to the downlink channel, determine whether the downlink data packet is received successfully, and the like.

In a nutshell, the embodiments of the present invention can be applied to the baseband processing part of a base station or user equipment.

In the embodiment of the present invention: the Floor function is an arithmetic function of rounding down, and mathematical symbols can be used express. E.g, The Ceiling function is an upward rounding operation function, and mathematical symbols can be used express. E.g,

FIG. 3 shows a method 300 for processing communication signals in a communication system according to an embodiment of the present invention. The method 300 for processing communication signals can be applied to the application scenario shown in FIG. 1 , but the embodiment of the present invention is not limited thereto . As shown in Figure 3, the method 300 includes:

S310, performing discrete Fourier transform (DFT) processing on the input data to obtain a DFT data sequence;

S320. Perform orthogonal frequency division multiplexing on the DFT data sequence and the pilot sequence in the same symbol.

Therefore, according to the method for processing a communication signal in a communication system according to an embodiment of the present invention, the input data is subjected to discrete Fourier transform processing, and then orthogonal frequency division multiplexing is performed with the pilot sequence in the same symbol. Thereby, the peak-to-average power ratio when transmitting information in the communication system can be reduced, and the transmission overhead of the pilot can be reduced.

In this embodiment of the present invention, optionally, in S310, the input data may be coded and modulated user data. For example, in step S410 in the method 400 shown in FIG. 4 , the transmitting end (for example, the base station or the user equipment) may encode (for example, Forward Error Correction (Forward Error Correction, "FEC")) encoded The user data is modulated, and then N (for example: M/2) point discrete Fourier transform (Discrete Fourier Transform, “DFT” for short) processing is performed to obtain a DFT data sequence.

For example, when the device at the sending end is a base station, user data may refer to a Physical Downlink Control Channel (Physical Downlink Control Channel, referred to as "PDCCH"), a Physical Downlink Shared Channel (Physical Downlink Shared Channel, referred to as "PDSCH"), a physical hybrid Physical Hybrid ARQ Indicator Channel (Physical Hybrid ARQ Indicator Channel, referred to as "PHICH"). When the device at the sending end is a user device, user data may refer to a Physical Uplink Shared Channel (Physical Uplink Shared Channel, referred to as "PUSCH"), a physical uplink Control channel (Physical Uplink Control Channel, referred to as "PUCCH"), but the present invention is not limited thereto.

Specifically, step S320 may be: mapping the DFT data sequence and the pilot sequence to different subcarriers in the M effective subcarriers in the same symbol, for example, in FIG. 4, the DFT data sequence is mapped to M/ On 2 subcarriers, the pilot sequence is mapped to other M/2 subcarriers. Among them, the effective subcarriers can be understood as the subcarriers included in the bandwidth that can be used to transmit data in the total bandwidth supported by the communication system, and the total bandwidth supported by the communication system can be called "system bandwidth", and the system bandwidth can be understood as the existing communication standard The channel bandwidth (Channel Bandwith), or the channel bandwidth used in the future evolution of the communication system. For example, the system bandwidth that may be supported by the LTE system may be 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, and so on.

For example, the above pilot sequence may be a Zadoff-Chu (abbreviated as "ZC") sequence, or other suitable sequences, which is not limited in the present invention.

And, further, after subcarrier mapping is performed on the data sequence and pilot sequence at the sending end, the sending signal can be generated according to the frequency domain signal generation method, as shown in S430-S460 in FIG. 4 , the sending end can use the mapped subcarrier The two ends of the carrier are filled with zeros, and then an inverse fast Fourier transform (InverseFast Fourier Transform, referred to as "IFFT") or an inverse discrete Fourier transform (Inverse Discrete Fourier Transform, referred to as "IDFT") is performed, followed by a cyclic prefix or 0 The prefix is sent to the radio frequency transmitting module for transmission after serial-to-parallel conversion.

Correspondingly, when receiving, the receiving end performs reception according to the reverse process of the above-mentioned method 300 . Specifically, the receiving end receives the data processed by the receiver's radio frequency from the radio frequency receiving module, performs serial-to-parallel conversion, and removes the cyclic prefix or zero prefix, then performs FFT, and removes the zeros at both ends of the subcarrier; then uses the pilot part Perform channel estimation, estimate channels on all time-frequency resources, and use the estimated channel information to demodulate the data part.

Optionally, when orthogonal frequency division multiplexing is performed on the DFT data sequence and the pilot sequence in the same symbol, the pilot sequence can be mapped to the M in the time domain symbol in a distributed mapping manner. On the K subcarriers in the subcarriers, K is a positive integer less than or equal to M-N, M is the number of effective subcarriers in the symbol, and N is the number of DFT processing points; the DFT data sequence is mapped to the symbol in the N subcarriers different from the K subcarriers among the M subcarriers.

Specifically, the distributed mapping method may be performed by mapping subcarriers with fixed intervals to one subcarrier, or by mapping subcarriers with non-fixed intervals to one subcarrier. For example, when performing During the subcarrier mapping, the subcarrier mapping may be performed in a cyclic manner of firstly spacing 1 subcarrier, then spacing 2 subcarriers, then spacing 1 subcarrier, and then spacing 2 subcarriers. The manner in which each subcarrier is mapped may be referred to as a mapping pattern. In the embodiment of the present invention, the pilot sequence may be mapped to the K subcarriers by mapping every L subcarriers to a subcarrier, where L is a positive integer greater than or equal to 1. For example, the value of L may be 1.

After the above mapping, the subcarriers carrying the pilot sequence form a pattern similar to "comb teeth", and the subcarriers carrying data form another "comb tooth". In order to distinguish which "comb" the pilot sequence and data belong to, the system can predefine that the pilot sequence is mapped from the first subcarrier or from the second subcarrier or from other numbered subcarriers; The dynamic selection of the two "comb teeth" can be carried out in a certain way, for example, the rotation of the "comb teeth" is performed between two adjacent symbols or time slots (a time slot is composed of multiple consecutive symbols), but The present invention is not limited thereto.

Further, when the DFT data sequence is mapped to N subcarriers different from the K subcarriers among the M subcarriers in the symbol, the DFT data sequence can be phase-rotated and then mapped to the N subcarriers, In other words, the DFT data sequence is subjected to sample point shift processing, for example, S470 in FIG. 4 is to perform half sample point shift processing on the DFT data sequence. where the phase rotation factor of this phase rotation is S is the number of the subcarrier, and T is the number of IFFT points in the communication system. The number of IFFT points is generally the smallest product or integer power of 2, 3 or 5 greater than M. The foregoing is a method for generating a frequency-domain signal. It should be understood that the transmitted signal generated by the above frequency domain signal generation method is equivalent to the transmitted signal generated by the following time domain signal generation method:

where l represents the lth symbol, 0≤t<(N _CP,l +T)×T _s is the symbol duration, s _l (t) is the generated time domain signal, N _CP,l represents the CP in symbol l The number of points, T is the number of inverse Fourier transform points in the communication system, Indicates the subcarrier number, Δf indicates the subcarrier frequency domain interval, T _s is the system sampling clock cycle, is the information modulated on symbol l and subcarrier k ^(-) , it can be a data symbol after DFT transformation, or a symbol of pilot frequency, g(x) is a logic function, and the value is 0 or 1, In the embodiment of the present invention, if the DFT data needs to be shifted by half a sampling point and it is assumed that it is modulated onto subcarrier k ^(-) , then g(k ⁻ ) is 1, otherwise g(k ⁻ ) is 0.

Correspondingly, the device at the receiving end needs to determine whether the phase rotation process has been performed on the DFT data sequence. For example, it can be determined whether the phase rotation process has been performed according to the implicit indication rules predefined by the system. Preferably, the transmitting end can send samples to the receiving end. Point shift indication information, where the sampling point shift indication information indicates that phase rotation processing has been performed on the DFT data sequence. Therefore, when the receiving end performs data demodulation, it converts the received signal into a frequency domain signal (specifically, the received symbols (including the composite symbols composed of pilot and data) can be FFT or IDFT to obtain the frequency domain signal) , according to the channel estimation information, the DFT data sequence is subjected to frequency domain equalization processing to obtain a frequency domain equalization data sequence; the data after performing phase compensation on the frequency domain equalization data sequence is subjected to N-point discrete Fourier inverse transform IDFT to obtain IDFT data sequence, demodulate and decode the IDFT data sequence, where the phase compensation factor of the phase compensation is

As an optional embodiment, when the device at the sending end is a base station, the sampling point shift indication information may be sent to the receiving end by sending a physical control channel (for example: PDCCH) to the receiving end, and the sending end is a user equipment When scheduling the user equipment, the base station can send a physical control channel to the user equipment to instruct the user equipment whether to shift the sampling point when sending pilot and data within a single symbol, but the present invention does not Not limited to this.

As an optional embodiment, the PDCCH information also includes at least one of the following information: modulation and coding strategy level information, user equipment grouping information, data location information in DFT, pilot frequency and subcarriers occupied by data information.

As an optional embodiment, the value of N may be M/2, and the number of pilot sequences may be M/2.

It should be understood that the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and does not constitute any limitation to the implementation process of the embodiment of the present invention.

A method 500 for processing communication signals in a communication system according to another embodiment of the present invention will be described in detail below in conjunction with FIG. 5 . The method 500 can be performed by a base station. As shown in FIG. 5 , the method 500 includes:

S510. Perform N-point discrete Fourier transform DFT processing on the first data to obtain a first DFT data sequence, the first data corresponding to the first group of user equipment, where N is less than M, and M is the system of the communication system The number of effective subcarriers included in the bandwidth, M is a positive integer greater than 1;

S520. Perform K-point DFT processing on the second data to obtain a second DFT data sequence, where the second data corresponds to the second group of user equipment, and K is less than or equal to M-N;

S530. Perform orthogonal frequency division multiplexing on the first DFT data sequence and the second DFT data sequence in the same symbol.

Therefore, according to the method for processing communication signals in a communication system in the embodiment of the present invention, the data of two groups of user equipments are subjected to independent discrete Fourier transform processing and subcarrier mapping to ensure that the two groups of user equipments are independently transmitted. Group user equipment can independently perform multiple-input multiple-output processing to obtain diversity, multiplexing, and array gain, and can reduce the peak-to-average power ratio when transmitting information in the communication system.

Specifically, when a base station (Base Station, referred to as "BS") sends data to multiple user equipments UE, the user equipments in the system can be divided into two groups, the first group includes n user equipments (n is greater than 0), the second group includes m user equipment (m is an integer greater than 0), specifically, as shown in S610 in Figure 6, the data of each user equipment in each group of user equipment is independently FEC encoded and interleaved , scrambling, and modulation, and the modulated data in the two groups are processed by DFT respectively. Optionally, the data of the first group of user equipment is processed by N-point DFT to obtain the first DFT data sequence; the data of the second group of user equipment is processed by K-point DFT to obtain the second DFT data sequence. Optionally, N and The values of K may all be M/2.

It should be understood that "first" and "second" are just for distinguishing and not limiting the features described. For example, "the first group of user equipment" can also be called "the second group of user equipment", "the first DFT data sequence" can also be called "second DFT data sequence".

Optionally, in S520, when the data of K is less than M-N, the first DFT data sequence and the second DFT data sequence cannot occupy all effective subcarriers, and at this time, repeated mapping of the first DFT data sequence and/or The manner of the second DFT data sequence avoids waste of frequency domain resources.

Optionally, S530 may be expressed as: mapping the first DFT data sequence and the second DFT data sequence to different subcarriers among the M subcarriers in the same symbol, as shown in S620 in FIG. 6 specifically, Two sets of DFT data sequences are respectively subjected to subcarrier mapping.

Specifically, as shown in S630-S660 in Figure 6, the base station can pad zeros at both ends of the mapped subcarriers, and then perform IFFT or IDFT; then add a cyclic prefix or a 0 prefix, and send it to the radio frequency transmission module after serial-to-parallel conversion to send.

Correspondingly, when performing reception, the user equipment performs reception according to the reverse process of the foregoing method 500 . Specifically, the user equipment receives the data processed by the radio frequency of the receiver from the radio frequency receiving module, performs serial-to-parallel conversion, and removes the cyclic prefix or 0 prefix, then performs FFT, and removes the zeros at both ends of the subcarrier, and then uses Channel estimation is performed on the pilot frequency in the symbol of the frequency part, channels on all time-frequency resources in the symbol are estimated, and data demodulation is performed by using the estimated channel information.

Optionally, in S630, when performing orthogonal frequency division multiplexing on the first DFT data sequence and the second DFT data sequence in the same symbol, the first DFT data sequence is distributed in a manner of mapping mapped to N subcarriers in the M subcarriers in the symbol, and the second DFT data sequence is mapped to K subcarriers in other subcarriers except the N subcarriers in the M subcarriers in the symbol .

Specifically, the way of distributed mapping may be to map subcarriers with fixed intervals to one subcarrier, or to map subcarriers with non-fixed intervals to one subcarrier. For example, the first A DFT data sequence is mapped in a cyclic manner that is first spaced by 1 subcarrier, then spaced by 2 subcarriers, then spaced by 1 subcarrier, and then spaced by 2 subcarriers. The manner in which each subcarrier is mapped may be referred to as a mapping pattern. In the embodiment of the present invention, the first DFT data may be mapped to the N subcarriers by mapping every L subcarriers to a subcarrier, where L is a positive integer greater than or equal to 1. For example, the value of L is 1.

Further, when the second DFT data sequence is mapped to the K subcarriers in the M subcarriers in the symbol except the N subcarriers, the second DFT data sequence can be phase rotated Afterwards, it is mapped to K subcarriers in other subcarriers except the N subcarriers in the M subcarriers in the symbol, or in other words, the second DFT data sequence is subjected to sampling point shift processing, such as in FIG. 6 S670, can perform half-sample point shift processing, where the phase rotation factor of this bit rotation is S is the serial number of the subcarrier, and T is the number of IFFT points of the inverse Fourier transform in the communication system. The number of IFFT points is generally the smallest integer power of 2, 3 or 5 greater than M. The foregoing is a method for generating a frequency-domain signal. Likewise, the time-domain signal generation method described in the above method 300 may be used to generate a transmission signal equivalent to the transmission signal generated by the above-mentioned frequency-domain signal generation method. To avoid repetition, details will not be described again. Thereby, the peak-to-average power ratio in the communication system can be further reduced.

Correspondingly, if the user equipment is one of the second group of user equipments, the user equipment needs to determine whether the second DFT data sequence has undergone phase rotation processing, for example, the second DFT data sequence can be determined according to the implicit indication rule predefined by the system Whether phase rotation processing has been performed on the data sequence, optionally, the base station may send sampling point shift indication information to the user equipment, where the sampling point shift indication information indicates that phase rotation processing has been performed on the second DFT data sequence. Therefore, when the user equipment performs demodulation, it needs to convert the received signal to obtain a frequency domain signal; then, according to the channel estimation information, perform frequency domain equalization processing on the second DFT data sequence to obtain a frequency domain equalized data sequence, which will be The frequency-domain equalized data sequence is subjected to phase compensation for the data sequence to perform K-point IDFT to obtain the IDFT data sequence, where the phase compensation factor of the phase compensation is After that, the user equipment intercepts the information symbol of the user equipment itself, and performs demodulation and decoding processing.

Optionally, the data of multiple user equipments can be multiplexed according to the method 500 to form a set of data, and this set of data can be multiplexed with the pilot sequence in the same symbol using the method 300.

As an optional embodiment, the base station may send physical downlink control channel PDCCH information to the user equipment, where the PDCCH information includes the sampling point shift indication information.

As an optional embodiment, the PDCCH information further includes at least one of the following information: modulation and coding strategy level information, user equipment grouping information, and position information of data in DFT.

Wherein, the Modulation and Coding Scheme level (MCS for short) information may reuse the MCS indication method in the LTE system, and use 5 bits to represent 32 kinds of MCS levels. The user equipment group information is used to indicate the group to which the user equipment belongs. One bit can be used to indicate the group to which the user equipment belongs. For example, "1" can be used to indicate that the user equipment belongs to the first group, and "0" can be used to indicate that the user equipment belongs to the second group. , multiple bits may also be used to indicate the group to which the user equipment belongs. The location information of the data in the DFT is used to indicate which part of the first DFT data sequence or which part of the second DFT data sequence the data corresponding to the user equipment is. Specifically, a DFT data block may include For the data of multiple user equipments, for example, the data of user equipment 1, 2, and 3 can be concatenated into P symbols, and DFT processing is performed uniformly. At this time, when the user equipment receives data, it needs to know the symbols occupied by the corresponding data. Which symbols are among the P symbols, that is, the position of the data of the user equipment in the DFT.

Optionally, the number of bits required to carry the location information of the data in the DFT can be calculated according to formula (1):

In formula (1), M _step is the minimum granularity of resource indication, which is an integer greater than or equal to 1. The base station can be configured by broadcasting or pre-defined by the system. The resource indication uses the starting position R _start and the number of continuous modulation symbols The L _CRs jointly represent the location of the data of the user equipment, and the Resource Indicator Value (RIV for short) of the PDCCH can be calculated by the following method:

if but

otherwise

where L _CRs ≥ 1 and not exceeding R _start divides M _step evenly (eg ), L _CRs divisible by M _step (such as ).

As an optional embodiment, the value of N may be M/2, and further, the value of K may be M/2.

It should be understood that the method 500 is not necessarily limited to the situation of two groups of user equipments, and can also be applied to the situation of more than two groups of user equipments. At this point, it is only necessary to perform corresponding operations according to the method 500 .

It should be understood that the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and does not constitute any limitation to the implementation process of the embodiment of the present invention.

The method for processing a communication signal in a communication system according to an embodiment of the present invention is described in detail above with reference to FIG. 3 to FIG. 6 . The device according to an embodiment of the present invention will be described in detail below in conjunction with FIG. 7 to FIG. 10 .

Figure 7 shows a device 10 according to an embodiment of the present invention, the device 10 comprising:

The first processing unit 11 is configured to perform discrete Fourier transform (DFT) processing on the input data to obtain a DFT data sequence;

The second processing unit 12 is further configured to perform orthogonal frequency division multiplexing on the DFT data sequence and the pilot sequence within the same symbol.

In the device of the embodiment of the present invention, the input data is subjected to discrete Fourier transform processing, and then orthogonal frequency division multiplexing is performed with the pilot sequence in the same symbol. Thus, the peak-to-average power ratio during information transmission in the communication system can be reduced, and the transmission overhead of the pilot can be reduced.

Optionally, in terms of performing orthogonal frequency division multiplexing on the DFT data sequence and the pilot sequence in the same symbol, the first processing unit 11 is specifically configured to: map the pilot sequence in a distributed mapping manner To the K subcarriers in the M subcarriers in the symbol, K is a positive integer less than or equal to M-N, M is the number of effective subcarriers in the symbol, and N is the number of points processed by the DFT; the DFT data The sequence is mapped to N subcarriers different from the K subcarriers among the M subcarriers in the symbol.

Optionally, in terms of mapping the DFT data sequence to N subcarriers different from the K subcarriers among the M subcarriers in the symbol, the first processing unit 11 is specifically configured to: phase the DFT data sequence Mapped to the N subcarriers after rotation, where the phase rotation factor of the phase rotation is S is the serial number of the subcarrier, and T is the number of IFFT points of the inverse Fourier transform in the communication system.

Optionally, in terms of mapping the pilot sequence to K subcarriers in the M subcarriers in the symbol in a distributed mapping manner, the first processing unit 11 is specifically configured to: use the pilot sequence every The manner in which L subcarriers are mapped to one subcarrier is mapped to the K subcarriers, where L is a positive integer greater than or equal to 1.

Optionally, the value of N is M/2.

It should be understood that the device 10 here is embodied in the form of functional units. The term "unit" here may refer to an application specific integrated circuit (Application Specific Integrated Circuit, referred to as "ASIC"), an electronic circuit, a processor (such as a shared processor, a dedicated processor or group of processors, etc.) and memory, incorporated logic, and/or other suitable components to support the described functionality. In an optional example, those skilled in the art may understand that the device 10 may be used to execute various processes and/or steps of the method 300 in the foregoing method embodiments, and details are not repeated here to avoid repetition.

Figure 8 shows a device 20 according to another embodiment of the present invention, the device 20 comprising:

The first processing unit 21 is configured to perform N-point discrete Fourier transform (DFT) processing on the first data to obtain a first DFT data sequence, the first data corresponding to the first group of user equipment, where N is less than M, and M is the number of effective subcarriers included in the system bandwidth of the communication system, and M is a positive integer greater than 1;

The first processing unit 21 is further configured to perform K-point DFT processing on the second data to obtain a second DFT data sequence, the second data corresponds to the second group of user equipment, and K is less than or equal to M-N;

The second processing unit 22 is further configured to perform OFDM on the first DFT data sequence and the second DFT data sequence within the same symbol.

According to the device according to the embodiment of the present invention, the data of two groups of user equipments are subjected to independent discrete Fourier transform processing and subcarrier mapping, so as to ensure that the two groups of user equipments can transmit independently, thus, each group of user equipments can independently perform multi-input Multiple output processing, to obtain diversity, multiplexing, array gain, and can reduce the peak-to-average power ratio when transmitting information in the communication system.

Optionally, in terms of performing orthogonal frequency division multiplexing on the first DFT data sequence and the second DFT data sequence in the same symbol, the second processing unit 22 is specifically configured to: the first DFT data sequence Mapping to N subcarriers in the M subcarriers in the symbol in a distributed mapping manner; mapping the second DFT data sequence to other subcarriers except the N subcarriers in the M subcarriers in the symbol on the K subcarriers in .

Optionally, in terms of mapping the second DFT data sequence to K subcarriers in other subcarriers except the N subcarriers among the M subcarriers in the symbol, the second processing unit 22 is specifically configured to : The second DFT data sequence is phase-rotated and then mapped to K subcarriers in other subcarriers except the N subcarriers in the M subcarriers in the symbol;

where the phase rotation factor of this phase rotation is S is the number of the subcarrier, and T is the number of IFFT points in the communication system.

Optionally, in terms of mapping the first DFT data sequence to N subcarriers in the M subcarriers in the symbol in a distributed mapping manner, the second processing unit 22 is specifically configured to: the first DFT The data sequence is mapped to the N subcarriers in a manner that every L subcarriers are mapped to a subcarrier, and L is a positive integer greater than or equal to 1.

Optionally, the value of N is M/2.

It should be understood that the device 20 here is embodied in the form of a functional unit. The term "unit" here may refer to an application specific integrated circuit (Application Specific Integrated Circuit, referred to as "ASIC"), an electronic circuit, a processor (such as a shared processor, a dedicated processor or group of processors, etc.) and memory, incorporated logic, and/or other suitable components to support the described functionality. In an optional example, those skilled in the art may understand that the apparatus 20 may be used to execute various processes and/or steps of the method 500 in the foregoing method embodiments, and details are not described herein again to avoid repetition.

Fig. 9 shows a device 30 according to yet another embodiment of the present invention, the device 30 includes a processor 31, a memory 32 and a bus system 33, the processor 31 and the memory 32 are connected through the bus system 33, the memory 32 is used for storing instructions, the processor 31 is configured to execute the instructions stored in the memory 32, so that the apparatus 30 executes the steps executed by the base station or the user equipment in the above method 300. example,

The processor 31 is used to perform discrete Fourier transform (DFT) processing on the input data to obtain a DFT data sequence;

The processor 31 is further configured to perform orthogonal frequency division multiplexing on the DFT data sequence and the pilot sequence within the same symbol.

In the device of the embodiment of the present invention, the input data is processed by discrete Fourier transform and mapped with the pilot sequence in the same symbol for orthogonal frequency division multiplexing. Thus, the peak-to-average power ratio during information transmission in the communication system can be reduced, and pilot transmission overhead can be reduced.

It should be understood that, in the embodiment of the present invention, optionally, the processor 31 may be a central processing unit (Central Processing Unit, CPU for short), and the processor 31 may also be other general-purpose processors, digital signal processors (Digital Signal Processing (DSP for short), Application Specific Integrated Circuit (ASIC for short), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

Optionally, the processor 31 may also be a dedicated processor, and the dedicated processor may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip with other dedicated processing functions of the base station.

The memory 32 may include read-only memory and random-access memory, and provides instructions and data to the processor 31 . A portion of memory 32 may also include non-volatile random access memory. For example, memory 32 may also store device type information.

The bus system 33 may include not only a data bus, but also a power bus, a control bus, and a status signal bus. However, for the sake of clarity, the various buses are labeled as bus system 33 in the figure.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 31 or instructions in the form of software. The steps of the methods disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 32, and the processor 31 reads the information in the memory 32, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.

Optionally, as an embodiment, the processor 31 is specifically configured to: map the pilot sequence to K subcarriers among the M subcarriers in the symbol in a distributed mapping manner, where K is less than or equal to M-N is a positive integer, M is the number of effective subcarriers in the symbol, and N is the number of points processed by the DFT; the DFT data sequence is mapped to N subcarriers different from the K subcarriers in the M subcarriers in the symbol superior.

Optionally, as an embodiment, the processor 31 is specifically configured to: perform phase rotation on the DFT data sequence and map it to the N subcarriers, where the phase rotation factor of the phase rotation is S is the number of the subcarrier, and T is the number of IFFT points in the communication system.

Optionally, as an embodiment, the processor 31 is specifically configured to: map the pilot sequence to the K subcarriers in a manner of mapping every L subcarriers to a subcarrier, where L is greater than or equal to A positive integer of 1.

Optionally, as an embodiment, the value of N is M/2.

It should be understood that the device 30 according to the embodiment of the present invention may correspond to the device 10 according to the embodiment of the present invention, and the above-mentioned and other operations and/or functions of the various modules in the device 30 are respectively in order to realize the corresponding flow of the method 300 in FIG. 3 , for the sake of brevity, it is not repeated here.

In the device of the embodiment of the present invention, the input data is subjected to discrete Fourier transform processing, and then orthogonal frequency division multiplexing is performed with the pilot sequence in the same symbol. Thus, the peak-to-average power ratio during information transmission in the communication system can be reduced, and pilot transmission overhead can be reduced.

Fig. 10 shows a device 40 according to yet another embodiment of the present invention, the device 40 includes a processor 41, a memory 42 and a bus system 43, the processor 41 and the memory 42 are connected through the bus system 43, the memory 42 is used for Instructions are stored, and the processor 41 is configured to execute the instructions stored in the memory 42, so that the apparatus 40 executes the steps executed by the base station in the above method 500. example,

The processor 41 is used to perform N-point discrete Fourier transform DFT processing on the first data to obtain a first DFT data sequence, the first data corresponding to the first group of user equipment, where N is less than M, and M is the communication The number of effective subcarriers included in the system bandwidth of the system, M is a positive integer greater than 1;

The processor 41 is further configured to perform K-point DFT processing on the second data to obtain a second DFT data sequence, the second data corresponds to the second group of user equipment, and K is less than or equal to M-N;

The processor 41 is further configured to perform orthogonal frequency division multiplexing on the first DFT data sequence and the second DFT data sequence within the same symbol.

The device in the embodiment of the present invention performs independent discrete Fourier transform processing and subcarrier mapping on the data of two groups of user equipments to ensure that the two groups of user equipments can transmit independently, thus, each group of user equipments can independently perform multi-input and multiple Output processing to obtain diversity, multiplexing, array gain, and the ability to reduce the peak-to-average power ratio when transmitting information in a communication system.

It should be understood that, in the embodiment of the present invention, optionally, the processor 41 may be a central processing unit (Central Processing Unit, CPU for short), and the processor 41 may also be other general-purpose processors, digital signal processors (Digital Signal Processing (DSP for short), Application Specific Integrated Circuit (ASIC for short), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like.

Optionally, the processor 41 may also be a dedicated processor, and the dedicated processor may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip with other dedicated processing functions of the base station.

The memory 42 may include read-only memory and random-access memory, and provides instructions and data to the processor 41 . A portion of memory 42 may also include non-volatile random access memory. For example, memory 42 may also store device type information.

The bus system 43 may include not only a data bus, but also a power bus, a control bus, and a status signal bus. However, for the sake of clarity, the various buses are labeled as bus system 43 in the figure.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 41 or instructions in the form of software. The steps of the methods disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 42, and the processor 41 reads the information in the memory 42, and completes the steps of the above method in combination with its hardware. To avoid repetition, no detailed description is given here.

Optionally, as an embodiment, the processor 41 is specifically configured to: map the first DFT data sequence to N subcarriers in the M subcarriers in the symbol in a distributed mapping manner; The DFT data sequence is mapped to K subcarriers in other subcarriers except the N subcarriers among the M subcarriers in the symbol.

Optionally, as an embodiment, the processor 41 is specifically configured to: perform phase rotation on the second DFT data sequence and then map it to subcarriers other than the N subcarriers among the M subcarriers in the symbol On the K subcarriers of ;

where the phase rotation factor of this phase rotation is S is the number of the subcarrier, and T is the number of IFFT points in the communication system.

Optionally, as an embodiment, the processor 41 is specifically configured to: map the first DFT data sequence to the N subcarriers in a manner of mapping every L subcarriers to a subcarrier, where L is greater than or a positive integer equal to 1.

Optionally, as an embodiment, the value of N is M/2.

The device in the embodiment of the present invention performs independent discrete Fourier processing and subcarrier mapping on the data of two groups of user equipments, so as to ensure that the two groups of user equipments can transmit independently, thus, each group of user equipments can independently perform multiple input and multiple output Processing, to obtain diversity, multiplexing, array gain, and can reduce the peak-to-average power ratio of the communication system.

It should be understood that in the embodiments of the present invention, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. For example, A and/or B may mean that A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are 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 according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.

Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated. to another system, or some features may be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

Through the above description of the implementation manners, those skilled in the art can clearly understand that the present invention can be implemented by hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over 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 place to another. A storage media may be any available media that can be accessed by a computer. By way of example but not limitation: computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or may be used to carry or store information in the form of instructions or data structures desired program code and any other medium that can be accessed by a computer. also. Any connection can 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 wire, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave , then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave are included in the fixation of the respective medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disc, and Blu-ray disc, where discs usually reproduce data magnetically, and discs Lasers are used to optically reproduce the data. Combinations of the above should also be included within the scope of computer-readable media.

In a word, the above are only preferred embodiments of the technical solutions of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (12)

1. a kind of method that signal of communication is processed in communication system, it is characterised in that methods described includes：

Input data is carried out into discrete Fourier transform DFT treatment, DFT data sequences are obtained；

The DFT data sequences and pilot frequency sequence are carried out into OFDM in same symbol.

2. method according to claim 1, it is characterised in that described by the DFT data sequence Row carry out OFDM with pilot frequency sequence in same symbol, including：

The pilot frequency sequence is carried according to the M son that the mode of distributed mapping is mapped in the symbol On K subcarrier in ripple, K is the positive integer less than or equal to M-N, and M is in the symbol The number of effective subcarrier, N is the points of the DFT treatment；

With described K son in the M subcarrier that the DFT data sequences are mapped in the symbol On the different N number of subcarrier of carrier wave.

3. method according to claim 2, it is characterised in that described by the DFT data sequence Row are mapped to different from the K subcarrier N number of subcarriers in M subcarrier in the symbol On, including：

It is mapped on N number of subcarrier after the DFT data sequences are carried out into phase place, wherein, The phase rotation coefficient of the phase place isS is the numbering of subcarrier, and T is the communication system Inverse fast Fourier transform IFFT point number in system.

4. according to the method in claim 2 or 3, it is characterised in that described by the pilot tone sequence Arrange on K subcarrier in M subcarrier being mapped in the symbol according to distributed mapping mode, Including：

By the pilot frequency sequence according to the mode being mapped to every L subcarrier on a subcarrier, mapping Onto the K subcarrier, L is the positive integer more than or equal to 1.

5. method according to any one of claim 1 to 4, it is characterised in that the value of N It is M/2.

6. a kind of method that signal of communication is processed in communication system, it is characterised in that methods described includes：

First data are carried out into leaf transformation DFT treatment in N point discrete Fouriers, a DFT data sequences are obtained Row, first data are corresponding with first group of user equipment, wherein, N is less than M, and M is described logical The number of effective subcarrier that the system bandwidth of letter system includes, M is the positive integer more than 1；

Second data are carried out into K point DFT treatment, the 2nd DFT data sequences, second number is obtained According to corresponding with second group of user equipment, K is less than or equal to M-N；

The first DFT data sequences and the 2nd DFT data sequences are entered in same symbol Row OFDM.

7. method according to claim 6, it is characterised in that described by a DFT numbers OFDM is carried out in same symbol with the 2nd DFT data sequences according to sequence, including：

The first DFT data sequences are mapped in the symbol according to the mode of distributed mapping On N number of subcarrier in M subcarrier；

The N is removed in the M subcarrier that the 2nd DFT data sequences are mapped in the symbol On K subcarrier in other subcarriers outside individual subcarrier.

8. method according to claim 7, it is characterised in that described by the 2nd DFT numbers According to other sons in sequence mapping to M subcarrier in the symbol in addition to N number of subcarrier On K subcarrier in carrier wave, including：

The M son that the 2nd DFT data sequences be mapped to after phase place in the symbol On K subcarrier in other subcarriers in carrier wave in addition to N number of subcarrier；

Wherein, the phase rotation coefficient of the phase place isS is the numbering of subcarrier, and T is institute State the inverse fast Fourier transform IFFT point number in communication system.

9. the method according to any one of claim 6 to 8, it is characterised in that described by institute A DFT data sequences are stated to be carried according to the M son that the mode of distributed mapping is mapped in the symbol On N number of subcarrier in ripple, including：

The first DFT data sequences are mapped on a subcarrier according to every L subcarrier Mode, is mapped on N number of subcarrier, and L is the positive integer more than or equal to 1.

10. the method according to any one of claim 6 to 9, it is characterised in that the value of N It is M/2.

11. a kind of devices, it is characterised in that including processor and memory, the processor and described Memory is connected by bus system, and the memory is used for store instruction, and the processor is used to perform The instruction of the memory storage so that described device is performed as described in any one in claim 1 to 5 Method.

12. a kind of devices, it is characterised in that including processor and memory, the processor and described Memory is connected by bus system, and the memory is used for store instruction, and the processor is used to perform The instruction of the memory storage so that device is performed as described in any one in claim 6 to 10 Method.