WO2017092697A1

WO2017092697A1 - Communication signal processing method and device in communication system

Info

Publication number: WO2017092697A1
Application number: PCT/CN2016/108254
Authority: WO
Inventors: 任海豹
Original assignee: 华为技术有限公司
Priority date: 2015-12-02
Filing date: 2016-12-01
Publication date: 2017-06-08
Also published as: CN106817331A

Abstract

Provided in an embodiment of the present invention are a communication signal processing method and device in a communication system. The method comprises: performing a Discrete Fourier Transform (DFT) processing on input data and acquiring a DFT data sequence; and performing orthogonal frequency division multiplexing on the DTF data sequence and a pilot frequency sequence in a same symbol. The present invention can reduce a peak to average power ratio when information is transmitted in the communication system, reducing a transmission overhead of a pilot frequency.

Description

Method and apparatus for processing communication signals in a communication system

The present application claims priority to Chinese Patent Application No. 201510872514.0, entitled "Method and Apparatus for Processing Communication Signals in Communication Systems", filed on Dec. 2, 2015, the entire contents of In this application.

Technical field

Embodiments of the present invention relate to the field of communications, and in particular, to a method and apparatus for processing a communication signal in a communication system.

Background technique

Broadband communication systems, in order to combat frequency-domain selective fading due to multipath, generally divide the entire system bandwidth into multiple sub-bands, each sub-band can be considered as flat fading, so that the receiver can be performed by a simple linear frequency domain equalizer. Frequency domain equalization and high reception performance. A system in which a wideband signal is divided into a plurality of narrowband signals in the frequency domain for transmission and reception is referred to as a multicarrier system. The Orthogonal Frequency Division Multiple Access (OFDMA) system is a typical multi-carrier system. Although the multi-carrier system reduces the complexity of the receiver for equalization, it has a serious disadvantage: a higher 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 working point of the power amplifier is always in the optimal amplification range, and the power amplifier efficiency is also optimal. When the PAPR is high, in order to ensure the normal amplification of the peak signal, the power amplifier needs to work. The point is rolled back, that is, the working point of the power amplifier is lowered, which also reduces the efficiency of the power amplifier and causes 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 resources of the low frequency band are basically exhausted, the wireless system may use the wireless spectrum of higher frequency points. The use of high frequency will make the wireless channel fading large. 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.

Summary of the invention

Embodiments of the present invention provide a method and apparatus for processing a communication signal in a communication system, which can solve the problem of a high peak-to-average power ratio when transmitting information in a communication system.

In a first aspect, a method for processing a communication signal in a communication system is provided, the method comprising: performing discrete Fourier transform (DFT) processing on the input data to obtain a DFT data sequence; The DFT data sequence and the pilot sequence are orthogonally frequency division multiplexed in the same symbol.

According to the method for processing a communication signal in a communication system according to an embodiment of the present invention, the data sequence subjected to the discrete Fourier transform process and the pilot sequence are orthogonally frequency division multiplexed in the same symbol, which can solve the transmission in the communication system. The peak-to-average power ratio of the information is high, and the transmission overhead of the pilot can be reduced.

With reference to the first aspect, in an implementation manner of the first aspect, the performing orthogonal frequency division multiplexing on the DFT data sequence and the pilot sequence in the same symbol comprises: following the pilot sequence The manner 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 MN, M is the number of effective subcarriers in the symbol, and N is the The number of points processed by the DFT; mapping the DFT data sequence to N subcarriers of the M subcarriers within the symbol that are different from the K subcarriers.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the mapping the DFT data sequence to the N sub-carriers of the M sub-carriers in the symbol that are different from the K sub-carriers Transmitting, on the carrier, the phase rotation of the DFT data sequence and mapping to the N subcarriers, wherein a phase rotation factor of the phase rotation is

S is the number of the subcarrier, and T is the number of points of the Inverse Fast Fourier Transform ("IFFT") in the communication system.

In conjunction with the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the method further includes: sending sampling point shift indication information, where the sampling point shift indication information indicates that the DFT data is performed. Phase rotation processing.

With reference to the first aspect and the foregoing implementation manner, in another implementation manner of the first aspect, the pilot sequence is mapped to K subcarriers of the M subcarriers in the symbol according to a distributed mapping manner. The method includes: mapping the pilot sequence to the K subcarriers according to how every L subcarriers are mapped to one subcarrier, where L is a positive integer greater than or equal to 1.

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

In a second aspect, a method of processing a communication signal in a communication system is provided, comprising: converting a received signal into a frequency domain signal, the received signal comprising a discrete Fourier transform (Discrete Fourier) Transform (referred to as "DFT") data sequence and pilot sequence, the DFT data sequence is a DFT processed data sequence, and the DFT data sequence and the pilot sequence are orthogonally frequency-divided in the same symbol Determining channel estimation information according to the pilot sequence; 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 in the same symbol, including: the pilot sequence is distributed according to a distributed mapping The manner is mapped to K subcarriers among the M subcarriers in the symbol, K is a positive integer less than or equal to MN, M is the number of effective subcarriers in the symbol, and N is the DFT processing a number of points; the DFT data sequence is mapped on N subcarriers of the M subcarriers within the symbol that are different from the K subcarriers.

With reference to the second aspect and the foregoing implementation manner, in another implementation manner of the second aspect, the DFT data sequence is mapped to N subcarriers different from the K subcarriers among M subcarriers in the symbol, The method includes: the DFT data sequence is phase-rotated and mapped to the N subcarriers, wherein a phase rotation factor of the phase rotation is

Where S is the number of the subcarrier, and T is the Inverse Fast Fourier Transform (abbreviated as "IFFT") or the Inverse Discrete Fourier Transform (Inverse Discrete Fourier Transform) in the communication system. "IDFT") points.

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

Performing frequency domain equalization processing on the DFT data sequence according to the channel estimation information to obtain a frequency domain equalized data sequence; performing N-point discrete Fourier transform on the data sequence after phase compensation of the frequency domain equalized data sequence IDFT obtains an IDFT data sequence, wherein the phase compensation phase compensation factor is

The IDFT data sequence is demodulated.

With reference to the second aspect and the foregoing implementation manner, in another implementation manner of the second aspect, the method further includes: receiving sampling point shift indication information, where the sampling point shift indication information indicates the DFT data sequence Phase rotation processing was performed.

With reference to the second aspect and the foregoing implementation manner, in another implementation manner of the second aspect, the pilot sequence is mapped to K subcarriers of the M subcarriers in the symbol according to 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 one subcarrier, and L is a positive integer greater than or equal to 1.

In conjunction with the second aspect and the above implementation thereof, in another implementation of the second aspect, N The value is M/2.

A third aspect provides a method for processing a communication signal in a communication system, comprising: performing a N-point Discrete Fourier Transform (DFT) processing on the first data to obtain a first DFT data sequence. The first data corresponds to the first group of user equipments, where N is less than M, M is the number of valid subcarriers included in the system bandwidth of the communication system, and M is a positive integer greater than 1; Performing K-point DFT processing on the data to obtain a second DFT data sequence, the second data corresponding to the second group of user equipments, K being less than or equal to MN; and 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 a communication signal in a communication system according to an embodiment of the present invention, data of two sets of user equipments is subjected to independent discrete Fourier transform processing and subcarrier mapping to ensure that two groups of users transmit independently, thereby, each group of users can Independently perform multiple input and multiple output processing to obtain diversity, multiplexing, and array gain, and 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, the performing the orthogonal frequency division multiplexing on the first DFT data sequence and the second DFT data sequence in the same symbol includes: Mapping the first DFT data sequence to N subcarriers of the M subcarriers in the symbol according to a distributed mapping manner; mapping the second DFT data sequence to M subcarriers in the symbol On the K subcarriers of the other subcarriers other than the N subcarriers.

With reference to the third aspect and the foregoing implementation manner, in another implementation manner of the third aspect, the mapping the second DFT data sequence to the M subcarriers in the symbol, except the N subcarriers The K subcarriers of the other subcarriers include: phase-rotating the second DFT data sequence and mapping to the other subcarriers of the M subcarriers in the symbol except the N subcarriers K subcarriers; wherein the phase rotation of the phase rotation is

With reference to the third aspect and the foregoing implementation manner, in another implementation manner of the third aspect, the method further includes: sending sampling point shift indication information, where the sampling point shift indication information indicates the second DFT data The sequence is phase rotated.

In conjunction with the third aspect and the foregoing implementation manner, in another implementation manner of the third aspect, the mapping, by the first DFT data sequence, to the N of the M subcarriers in the symbol according to a distributed mapping manner On the subcarriers, including: the first DFT data sequence according to every L The manner in which subcarriers are mapped onto one subcarrier is mapped to the N subcarriers, and L is a positive integer greater than or equal to 1.

With reference to the third aspect and the foregoing implementation manner, in another implementation manner of the third aspect, the sending the sampling point shift indication information includes: transmitting a physical downlink control channel PDCCH information, where the PDCCH information includes the sampling point Shift indication information.

With reference to the third aspect and the foregoing implementation manner, in another implementation manner of the third aspect, the PDCCH information further includes at least one of the following information: modulation and coding policy level information, user equipment group information, and data in DFT Location information in the middle.

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

A fourth aspect provides a method for processing a communication signal in a communication system, comprising: converting a received signal into a frequency domain signal, wherein the received signal includes Discrete Fourier Transform ("DFT") data. a sequence, the DFT data sequence including a first DFT data sequence after the first data corresponding to the first group of user equipments is processed by the N-point DFT and the second data corresponding to the second group of user equipments is processed by the K-point DFT a second DFT data sequence, the first DFT data sequence and the second DFT data sequence are orthogonally frequency division multiplexed in the same symbol, wherein N is less than M, K is less than or equal to MN, and M is The system bandwidth of the communication system includes the number of effective subcarriers; and the DFT data sequence is demodulated 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 orthogonally frequency division multiplexed in the same symbol, including: the first DFT The data sequence is mapped in a distributed mapping manner on N subcarriers of the M subcarriers within the symbol; the second DFT data sequence is mapped among the M subcarriers in the symbol except the N subcarriers On the other subcarriers of the K subcarriers.

With reference to the fourth aspect and the foregoing implementation manner, in another implementation manner of the fourth aspect, the second DFT data sequence is mapped to the M subcarriers in the symbol except the N subcarriers The K subcarriers in the subcarriers include: the second DFT data sequence is phase rotated and mapped to the N subcarriers, wherein the phase rotation of the phase rotation is

Where S is the number of the subcarrier, and T is the Inverse Discrete Fourier Transform (IDFT) point or the Inverse Fast Fourier Transform (referred to as Inverse Fast Fourier Transform) in the communication system. For "IFFT" points.

And performing frequency domain equalization processing on the second DFT data sequence according to the channel estimation information to obtain a frequency domain equalized data sequence, and performing K-point discrete Fourier on the data sequence after phase compensation of the frequency domain equalized data sequence. Inverting the IDFT to obtain an IDFT data sequence, wherein the phase compensation phase compensation factor is

The IDFT data sequence is demodulated.

With reference to the fourth aspect and the foregoing implementation manner, in another implementation manner of the fourth aspect, the method further includes: receiving sampling point shift indication information, where the sampling point shift indication information indicates the second DFT data The sequence is phase rotated.

In conjunction with the fourth aspect and the foregoing implementation manner, in another implementation manner of the fourth aspect, the first DFT data sequence is mapped to N subcarriers of the M subcarriers in the symbol according to a distributed mapping manner. The method includes: the first DFT data sequence is mapped to the N subcarriers in a manner that every L subcarriers are mapped to one subcarrier, and L is a positive integer greater than or equal to 1.

With reference to the fourth aspect and the foregoing implementation manner, in another implementation manner of the fourth aspect, the receiving the sampling point shift indication information includes: receiving a physical downlink control channel PDCCH information, where the PDCCH information includes the sampling point Shift indication information.

With reference to the fourth aspect and the foregoing implementation manner, in another implementation manner of the fourth aspect, the PDCCH information further includes at least one of the following information: modulation and coding policy level information, user equipment group information, and data in DFT Location information as described in .

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

In a fifth aspect, an apparatus is provided, comprising: a processor and a memory, the processor and the memory being connected by a bus system, the memory is for storing instructions, and the processor is configured to execute instructions stored by the memory, The apparatus is caused to perform the method of any of the first aspect or the first aspect of the first aspect described above.

In a sixth aspect, an apparatus is provided, including: a processor, a memory, and a receiver, the processor, the memory, and the receiver being connected by a bus system, the memory for storing instructions, the processor The instructions stored in the memory are executed to control the receiver to receive a signal such that the apparatus performs the method of any of the second aspect or the second aspect of the second aspect.

In a seventh aspect, an apparatus is provided, including: a processor and a memory, the processor and the The memory is connected by a bus system for storing instructions for executing the instructions stored by the memory, such that the apparatus performs the method of any of the above third or third possible implementations .

In an eighth aspect, an apparatus is provided, comprising: a processor, a memory, and a receiver, wherein the processor, the memory, and the receiver are connected by a bus system, the memory is configured to store an instruction, The processor is operative to execute the memory stored instructions to control the receiver to receive a signal such that the apparatus performs the method of any of the possible implementations of the fourth aspect or the fourth aspect.

A ninth aspect, a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.

According to a tenth aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method of any of the second aspect or any of the possible implementations of the second aspect.

In an eleventh aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method of any of the third aspect or any of the possible implementations of the third aspect.

A twelfth aspect, a computer readable medium for storing a computer program, the computer program comprising instructions for performing the method of any of the fourth or fourth aspect of the fourth aspect.

DRAWINGS

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

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 of processing a communication signal in a communication system according to an embodiment of the present invention;

4 is a schematic flowchart of a method for processing a communication signal in a communication system according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method of processing a communication signal in a communication system according to another embodiment of the present invention; FIG.

6 is a schematic flowchart of a method for processing a communication signal according to another embodiment of the present application;

Figure 7 is a schematic block diagram of an apparatus in accordance with an embodiment of the present invention;

Figure 8 is a schematic block diagram of an apparatus in accordance with another embodiment of the present invention;

Figure 9 is a schematic block diagram of an apparatus in accordance with still another embodiment of the present invention;

Figure 10 is a schematic block diagram of an apparatus in accordance with yet another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings.

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

It should be understood that in the 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, abbreviated as "MS"), and a mobile terminal ( Mobile terminal, etc., the user equipment can communicate with one or more core networks via a Radio Access Network ("RAN"), for example, the user equipment can be a mobile phone (or "cellular") Telephone), a computer with a mobile terminal, etc., for example, a portable, pocket, handheld, computer built-in or in-vehicle mobile device, and a terminal device in a future 5G network or a future evolved public land mobile network (Public Land) Terminal devices in the Mobile Network, referred to as "PLMN".

It should also be understood that, in the embodiment of the present invention, the base station may be an evolved Node B (abbreviated 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 this application.

FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present invention. As shown in FIG. 1, the base station communicates with a plurality of user equipments (UE1 to UE3) by wireless signals. The wireless signals commonly used for communication are transmitted and received in a certain modulation manner, and can be classified into two types: single carrier modulation and multi-carrier modulation.

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

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

2 is a schematic diagram of an internal structure of a base station and a user equipment in the application scenario shown in FIG. 1. As shown in FIG. 2, the base station may include an antenna or an antenna array, a duplexer, a transmitter (Transmitter, abbreviated as "TX"), and a receiver (Receiver, abbreviated as "RX"). (TX and RX may be collectively referred to as a transceiver. TRX), and baseband processing. Among them, the duplexer is used to enable the antenna or the antenna array to be used for both transmitting signals and receiving signals. TX is used to convert between RF signal and baseband signal. Generally, TX can include Power Amplifier ("PA"), Digital to Analog Converter ("DAC") and inverter. The PA generally works in a certain linear range. When the input signal amplitude is too large, the PA will work in a non-linear interval and reduce the efficiency of the PA. Generally, the RX may include a low-noise Amplifier (Low-Noise Amplifier, referred to as "LNA"), Analog to Digital Converter ("ADC") and frequency converter. The baseband processing section is used to implement processing of transmitted or received signals, such as layer mapping, precoding, modulation/demodulation, encoding/compiling, etc., and for physical control channels, physical data channels, physical broadcast channels, reference signals, and the like. Separate processing.

In an example, the base station may further include a control portion 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 section. As shown in FIG. 2, the UE has a single antenna. It should be understood that the UE may also have multiple antennas (ie, antenna arrays). Among them, the duplexer enables the antenna or the antenna array to be used for both transmitting signals and receiving signals. TX is used to convert between RF signal and baseband signal. Generally, TX can include PA, DAC and inverter. The UE side is battery-powered, which is more sensitive to PA power amplifier efficiency. Usually RX can include LNA, ADC and Inverter. The baseband processing section is used to implement processing of transmitted or received signals, such as layer mapping, precoding, modulation/demodulation, encoding/decoding, and the like. And separate processing is performed on the physical control channel, the physical data channel, the physical broadcast channel, the reference signal, and the like.

In an example, the UE may further include a control part, configured to request an uplink physical resource, and calculate channel state information (CSI) corresponding to the downlink channel, Determine whether the downlink packet is successfully received, etc.

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

In the embodiment of the present invention, the Floor function is an operation function that is rounded down, and a mathematical symbol can be used.

Said. E.g,

The Ceiling function is an up-rounding function, which can be used with mathematical symbols.

Said. E.g,

FIG. 3 illustrates a method 300 for processing a communication signal in a communication system according to an embodiment of the present disclosure. The method 300 for processing a communication signal may be applied to the application scenario shown in FIG. 1, but the embodiment of the present invention is not limited thereto. . As shown in FIG. 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 orthogonal frequency division multiplexing is performed in the same symbol as the pilot sequence. Thereby, the peak-to-average power ratio at the time of transmitting information in the communication system can be reduced, and the transmission overhead of the pilot can be reduced.

In the embodiment of the present invention, optionally, in S310, the input data may be encoded 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 (FEC)). The user data is modulated, and then subjected to N (for example, M/2) Discrete Fourier Transform ("DFT") processing to obtain a DFT data sequence.

For example, when the device at the transmitting end is a base station, the 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 (PDSCH), and a physical hybrid. The physical hybrid data channel (Physical Hybrid ARQ Indicator Channel, referred to as "PHICH"), when the device at the transmitting end is a user equipment, the user data may refer to a Physical Uplink Shared Channel (PUSCH), physical. The uplink uplink control channel (Physical Uplink Control Channel, abbreviated as "PUCCH"), but the application is not limited thereto.

Specifically, step S320 may be: mapping the DFT data sequence and the pilot sequence to different ones of the M valid subcarriers in the same symbol. For example, in FIG. 4, mapping the DFT data sequence to M/ On the two subcarriers, the pilot sequence is mapped to other M/2 subcarriers. The effective subcarrier can be understood as the subcarrier included in the bandwidth that can be used for transmitting data in the total bandwidth supported by the communication system. The total band supported by the communication system can be referred to as “system bandwidth”, and the system bandwidth can be understood as the existing communication standard. Channel Bandwith, or channel bandwidth used in future evolving communication systems. For example, the system bandwidth that the LTE system can support may be 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, 20 MHz, and the like.

For example, the pilot sequence may be a Zadoff-Chu ("ZC") sequence, and may be other suitable sequences, which is not limited in this application.

Furthermore, after the subcarrier mapping of the data sequence and the pilot sequence on the transmitting end, the transmitting signal may be generated according to the frequency domain generating signal method, as shown in S430-S460 in FIG. 4, the transmitting end may be in the mapped sub-carrier. The two ends of the carrier are zero-padded, and then an Inverse Fast Fourier Transform ("IFFT") or an Inverse Discrete Fourier Transform ("IDFT") is added, followed by a cyclic prefix. Or the 0 prefix, after serial and parallel conversion, is sent to the RF transmitting module for transmission.

Correspondingly, when receiving, the receiving end receives according to the reverse process of the above method 300. Specifically, the receiving end receives the data processed by the receiver radio frequency from the radio frequency receiving module, performs serial-to-parallel conversion, and removes the cyclic prefix or the zero prefix, and then performs FFT, and removes zeros at both ends of the subcarrier; and then uses the pilot part. The channel estimation is performed, the channels on all time-frequency resources are estimated, and the estimated channel information is used to perform demodulation of the data portion.

Optionally, when performing orthogonal frequency division multiplexing on the DFT data sequence and the pilot sequence in the same symbol, the pilot sequence may be mapped to the M in the time domain symbol according to a distributed mapping manner. On the K subcarriers of the subcarriers, K is a positive integer less than or equal to MN, M is the number of effective subcarriers in the symbol, and N is the number of points processed by the DFT; mapping the DFT data sequence into the symbol Among the M subcarriers, N subcarriers different from the K subcarriers.

Specifically, the manner of the distributed mapping may be performed by mapping the subcarriers with fixed intervals to one subcarrier, or mapping the subcarriers with irregular intervals to one subcarrier, for example, In the subcarrier mapping, subcarrier mapping may be performed in such a manner that one subcarrier is first spaced, two subcarriers are further spaced apart, one subcarrier is further spaced, and two subcarriers are further spaced. The manner in which each seed carrier is mapped may be referred to as a mapping pattern. In this embodiment of the present invention, the pilot sequence may be mapped to the K subcarriers by using L subcarriers mapped to one subcarrier, where L is a positive integer greater than or equal to 1. For example, the value of L can be 1.

After the above mapping, the subcarriers carrying the pilot sequence form a pattern resembling a "comb", and the subcarriers carrying the data constitute another "comb". In order to distinguish which "comb" the pilot sequence and the data belong to, the system may pre-define the pilot sequence to start mapping from the first subcarrier or start mapping from the second subcarrier or start mapping from other numbered subcarriers; The dynamic selection of two "combs" can be performed in a certain way, for example, a "comb" rotation between two adjacent symbols or time slots (a time slot composed of a plurality of consecutive symbols), but This application is not limited to this.

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 may be phase rotated and mapped to the N subcarriers. Alternatively, the DFT data sequence is subjected to sample point shift processing, for example, S470 in Fig. 4, and the DFT data sequence is subjected to half sampling point shift processing. Wherein the phase rotation factor of the phase rotation is

S is the number of the subcarrier, and T is the number of fast Fourier transform IFFT points in the communication system. The number of IFFT points is generally the smallest, greater than M, 3, or 5 product or integer power. The above is a frequency domain signal generation method. It should be understood that the transmission signal generated by the above-described frequency domain signal generation method is equivalent to the transmission signal generated by the following time domain signal generation method:

Where l denotes 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 denotes 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 represents the subcarrier frequency domain interval, and T _s is the system sampling clock period.

The information modulated on the symbol l and the subcarrier k ^(-) may be a DFT-transformed data symbol or a symbol of the pilot, and 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 sample point and assumed to be modulated onto the subcarrier k ^(-) , then g(k ^- ) is 1, otherwise g(k ^- ) is 0.

Correspondingly, the device at the receiving end needs to determine whether the DFT data sequence is subjected to phase rotation processing. For example, whether the phase rotation processing can be performed according to a predefined implicit indication rule of the system, preferably, the transmitting end can send the sampling to the receiving end. The point shift indication information indicating that the DFT data sequence is subjected to phase rotation processing. Therefore, the receiving end converts the received signal into a frequency domain signal when performing data demodulation (specifically, the received symbol (including the synthesized symbol composed of the pilot and the data) may be subjected to FFT or IDFT to obtain a frequency domain signal) And performing frequency domain equalization processing on the DFT data sequence according to the channel estimation information, and performing N-point discrete Fourier transform (IDFT) on the phase-compensated data of the frequency-domain equalized data sequence to obtain IDFT data. Sequence, demodulating and decoding the IDFT data sequence, wherein the phase compensation phase compensation factor is

As an optional embodiment, when the device at the transmitting end is a base station, the sampling point shift indication information is sent to the receiving end by sending a physical control channel (for example, PDCCH) to the receiving end, where the sending end is the user equipment. When the user equipment is scheduled to send the user equipment, the base station may indicate whether the user equipment performs the sampling point shift when performing pilot and data transmission in a single symbol by sending a physical control channel to the user equipment, but the present application Not limited to this.

As an optional embodiment, the PDCCH information further includes at least one of the following: modulation and coding policy level information, user equipment group information, location information of the data in the DFT, pilot and data occupied subcarriers. 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 size of the sequence numbers of the various processes described above does not imply a sequence of executions, and the order of execution of the processes is determined by its function and internal logic, and does not constitute any limitation to the implementation process of the embodiments of the present invention.

A method 500 for processing a communication signal in a communication system according to another embodiment of the present invention will be described in detail below with reference to 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, where the first data corresponds to the first group of user equipments, where N is less than M, and M is a system of the communication system. The number of effective subcarriers included in the bandwidth, and M is a positive integer greater than one;

S520, performing 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 equipments, 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 a communication signal in a communication system according to an embodiment of the present invention, data of two sets of user equipments is subjected to independent discrete Fourier transform processing and subcarrier mapping to ensure that two sets of user equipments are independently transmitted, thereby The group user equipment can independently perform multi-input and multi-output processing to obtain diversity, multiplexing, and array gain, and can reduce the peak-average function when transmitting information in the communication system. Rate ratio.

Specifically, when a base station ("BS" for short) transmits data to multiple user equipments, the user equipments in the system can be divided into two groups, and the first group includes n user equipments (n is greater than The second group includes the user equipment of m (m is an integer greater than 0). Specifically, as shown in S610 of FIG. 6, the data of each user equipment in each group of user equipments is independently FEC encoded and interleaved. , scrambling, modulation, and the data modulated in the two groups are subjected to DFT processing. Optionally, the data of the first group of user equipments is subjected to N-point DFT processing to obtain a first DFT data sequence; and the data of the second group of user equipments is subjected to K-point DFT processing to obtain a second DFT data sequence, optionally, N and The value of K can be both M/2.

It should be understood that “first” and “second” are only used to distinguish and not describe the features described, for example, “first group of user equipments” may also be referred to as “second group of user equipments”, “first DFT data”. The sequence "can also be a "second DFT data sequence".

Optionally, in S520, when the data of K is smaller than the MN, the first DFT data sequence and the second DFT data sequence cannot occupy all valid subcarriers. In this case, the first DFT data sequence may be repeatedly mapped and/or The manner of the second DFT data sequence avoids waste of frequency domain resources.

Alternatively, S530 may be expressed as: mapping the first DFT data sequence and the second DFT data sequence to different subcarriers of the M subcarriers in the same symbol, as shown in S620 in FIG. The two sets of DFT data sequences are separately subjected to subcarrier mapping.

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

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

Optionally, in S630, when the first DFT data sequence and the second DFT data sequence are orthogonally frequency-multiplexed in the same symbol, the first DFT data sequence is distributed and mapped. Mapping to N subcarriers of the M subcarriers within the symbol, mapping the second DFT data sequence to other than the N subcarriers of the M subcarriers within the symbol On K subcarriers in subcarriers.

Specifically, the manner of the distributed mapping may be performed by mapping the subcarriers with fixed intervals to one subcarrier, or mapping the subcarriers with unfixed intervals to one subcarrier, for example, A DFT data sequence is mapped in such a manner that one subcarrier is first spaced, two subcarriers are spaced apart, one subcarrier is further spaced, and two subcarriers are further spaced. The manner in which each seed carrier is mapped may be referred to as a mapping pattern. In this embodiment of the present invention, the first DFT data may be mapped to the N subcarriers by using L subcarriers mapped to one 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 K subcarriers of the M subcarriers other than the N subcarriers in the M subcarriers in the symbol, the second DFT data sequence may be phase rotated Then mapping to K subcarriers of the M subcarriers other than the N subcarriers in the symbol, or performing the sampling point shift processing on the second DFT data sequence, for example, in FIG. S670, half sampling point shift processing can be performed, wherein the phase rotation factor of the bit rotation is

S is the number of the subcarrier, and T is the inverse Fourier transform IFFT point number in the communication system. The number of IFFT points is generally the smallest, greater than M, 2, 3 or 5 integer powers. The above is a frequency domain signal generation method. Similarly, the time domain signal generation method described in the method 300 above may be used to generate a transmission signal equivalent to the transmission signal generated by the above-described frequency domain signal generation method. To avoid repetition, details are not 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 is subjected to phase rotation processing, for example, the second DFT may be determined according to a system predefined implicit indication rule. Whether the data sequence is subjected to phase rotation processing. Optionally, the base station may send sampling point shift indication information to the user equipment, where the sampling point shift indication information indicates that the second DFT data sequence is subjected to phase rotation processing. Therefore, when the user equipment performs demodulation, the received signal needs to be converted into a frequency domain signal; then, according to the channel estimation information, the second DFT data sequence is subjected to frequency domain equalization processing to obtain a frequency domain equalized data sequence, which will be The phase-compensated data sequence of the frequency-domain equalized data sequence performs a K-point IDFT to obtain an IDFT data sequence, wherein the phase compensation factor of the phase compensation is

After that, the user equipment intercepts the information symbols of the user equipment and performs demodulation and decoding processing.

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

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: modulation and coding policy level information, user equipment group information, and location information of the data in the DFT.

The modulation and coding scheme ("MCS") information may be used to multiplex the indication method of the MCS in the LTE system, and the 32 MCS levels are represented by 5 bits. The user equipment grouping information is used to indicate the group to which the user equipment belongs, and the group to which the user equipment belongs may be indicated by one bit. For example, “1” may be used to indicate that the user equipment belongs to the first group of user equipments, and “0” indicates that the user equipment belongs to the second group of user equipments. It is also possible to use multiple bits to indicate the packet 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 the data corresponding to the user equipment is, or which part of the second DFT data sequence, in particular, a DFT data block may include For example, the data of the user equipments 1, 2, and 3 can be cascaded into P symbols to perform DFT processing. In this case, when the user equipment receives data, it needs to know the symbols occupied by the corresponding data. Which of the P symbols are the locations of the user equipment's data in the DFT.

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

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

in case

then

otherwise

Where L _CRs ≥1 and no more than

R _start divides M _step (such as R _start =0, M _step , 2M _step ,...,

L _CRs divides M _step (eg L _CRs =M _step , 2M _step ,...,

).

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 case of two sets of user equipment, but may also be applied to the case of more than two sets of user equipment. At this point, it is only necessary to perform the corresponding operation according to the method 500.

A method of processing a communication signal in a communication system according to an embodiment of the present invention is described in detail above with reference to FIGS. 3 through 6, and an apparatus according to an embodiment of the present invention will be described in detail below with reference to FIGS. 7 through 10.

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

a first processing unit 11 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 in the same symbol.

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

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

Optionally, the first processing unit 11 is configured to: phase the DFT data sequence into the N subcarriers of the M subcarriers in the symbol that are different from the K subcarriers. Rotating and mapping to the N subcarriers, wherein the phase rotation of the phase rotation is

S is the number of the subcarrier, and T is the number of inverse Fourier transform IFFT points in the communication system.

Optionally, the first processing unit 11 is configured to: map the pilot sequence according to a distributed mapping manner to K subcarriers of the M subcarriers in the symbol. A manner in which L subcarriers are mapped onto one subcarrier is mapped to the K subcarriers, 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 apparatus 10 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an application specific integrated circuit ("ASIC"), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a proprietary A processor or group processor, etc.) and memory, merge logic, and/or other suitable components that support the functions described. In an alternative example, those skilled in the art may understand that the apparatus 10 may be used to perform various processes and/or steps of the method 300 in the foregoing method embodiments. To avoid repetition, details are not described herein.

Figure 8 shows a device 20 according to another embodiment of the 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, where the first data corresponds to the first group of user equipments, where N is less than M, M M is a positive integer greater than 1 for the number of valid subcarriers included in the system bandwidth of the communication system;

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, where the second data corresponds to the second group of user equipments, and K is less than or equal to M-N;

The second processing unit 22 is further configured to perform orthogonal frequency division multiplexing on the first DFT data sequence and the second DFT data sequence in the same symbol.

According to the apparatus of the embodiment of the present invention, the data of the two sets of user equipments are subjected to independent discrete Fourier transform processing and subcarrier mapping to ensure that the two sets of user equipments are independently transmitted, thereby each group of user equipments can independently perform multiple inputs. Multiple output processing, which acquires diversity, multiplexing, and array gain, and reduces the peak-to-average power ratio when transmitting information in a communication system.

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

Optionally, the second processing unit 22 is specifically configured to map the second DFT data sequence to K subcarriers of the M subcarriers other than the N subcarriers in the M subcarriers in the symbol. Transmitting the second DFT data sequence to K subcarriers of the M subcarriers other than the N subcarriers in the M subcarriers in the symbol;

Wherein the phase rotation factor of the phase rotation is

S is the number of the subcarrier, and T is the number of fast Fourier transform IFFT points in the communication system.

Optionally, the first processing unit 22 is specifically configured to: map the first DFT data sequence to the N subcarriers of the M subcarriers in the symbol according to a distributed mapping manner, where the second processing unit 22 is specifically configured to: use the first DFT The data sequence is mapped to the N subcarriers in such a manner that every L subcarriers are mapped to one 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 apparatus 20 herein is embodied in the form of a functional unit. The term "unit" herein may refer to an application specific integrated circuit ("ASIC"), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a proprietary A processor or group processor, etc.) and memory, merge logic, and/or other suitable components that support the functions described. In an alternative example, those skilled in the art may understand that the apparatus 20 may be used to perform various processes and/or steps of the method 500 in the foregoing method embodiments. To avoid repetition, details are not described herein again.

FIG. 9 shows a device 30 according to a further embodiment of the invention, the device 30 comprising a processor 31, a memory 32 and a bus system 33, the processor 31 and the memory 32 being connected by a bus system 33, the memory 32 being used for The instructions are stored by the processor 31 for executing the instructions stored by the memory 32 such that the apparatus 30 performs the steps performed by the base station or user equipment in the method 300 above. Example,

The processor 31 is configured to input data and perform discrete Fourier transform DFT processing 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 in the same symbol.

In the apparatus of the embodiment of the present invention, the input data is subjected to discrete Fourier transform processing, and then the pilot sequence is mapped in the same symbol to perform orthogonal frequency division multiplexing. Thereby, the peak-to-average power ratio at the time of information transmission in the communication system can be reduced, and the pilot transmission overhead can be reduced.

It should be understood that, in the embodiment of the present invention, the processor 31 may be a central processing unit (CPU), and the processor 31 may also be other common parts. Processor, Digital Signal Processing (DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic device , discrete gates or transistor logic devices, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor or 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 having other dedicated processing functions of the base station.

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

The bus system 33 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 33 in the figure.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 31 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 32, and the processor 31 reads the information in the memory 32 and, in conjunction with its hardware, performs the steps of the above method. To avoid repetition, it will not be described in detail here.

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

Optionally, as an embodiment, the processor 31 is specifically configured to: after the phase rotation of the DFT data sequence is mapped to the N subcarriers, where the phase rotation factor of the phase rotation is

Optionally, as an embodiment, the processor 31 is specifically configured to: follow the pilot sequence according to The mapping is performed on the K subcarriers every L subcarriers are mapped to one subcarrier, and L is a positive integer greater than or equal to 1.

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

It should be understood that apparatus 30 in accordance with an embodiment of the present invention may correspond to apparatus 10 in accordance with an embodiment of the present invention, and that the above and other operations and/or functions of various modules in apparatus 30 are respectively implemented to implement the respective processes of method 300 of FIG. For the sake of brevity, we will not repeat them here.

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

FIG. 10 shows a device 40 according to a further embodiment of the present application. The device 40 comprises a processor 41, a memory 42 and a bus system 43. The processor 41 and the memory 42 are connected by a bus system 43 for The processor 41 is configured to execute the instructions stored by the memory 42 such that the apparatus 40 performs the steps performed by the base station in the method 500 above. Example,

The processor 41 is configured to perform N-point discrete Fourier transform DFT processing on the first data to obtain a first DFT data sequence, where the first data corresponds to the first group of user equipments, where N is less than M, and M is the communication. The system bandwidth of the system includes the number of effective subcarriers, and M is a positive integer greater than one;

The processor 41 is further configured to 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 equipments, 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 in the same symbol.

The device of the embodiment of the present invention performs independent discrete Fourier transform processing and subcarrier mapping on data of two sets of user equipments, so as to ensure that two sets of user equipments are independently transmitted, thereby, each group of user equipments can independently perform multiple input and multiple inputs. Output processing, acquisition of 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, the processor 41 may be a central processing unit (CPU), and the processor 41 may also be other general-purpose processors and digital signal processors (Digital). Signal Processing (DSP), Application Specific Integrated Circuit (ASIC), Field-Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete Hardware components, etc. The general purpose processor may be a microprocessor or the processor or any conventional processor or 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 having other dedicated processing functions of the base station.

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

The bus system 43 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 43 in the figure.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 41 or an instruction in a form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 42, and the processor 41 reads the information in the memory 42 and performs the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

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

Optionally, as an embodiment, the processor 41 is specifically configured to: after the phase rotation of the second DFT data sequence is mapped to other subcarriers of the M subcarriers in the symbol except the N subcarriers. On K subcarriers;

Wherein the phase rotation factor of the phase rotation is

Optionally, as an embodiment, the processor 41 is specifically configured to map the first DFT data sequence to the N subcarriers according to the manner that every L subcarriers are mapped to one 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 of the embodiment of the present invention performs independent discrete Fourier processing and subcarrier mapping on data of two sets of user equipments, so as to ensure that two sets of user equipments are independently transmitted, thereby, each group of user equipments can be The multi-input and multi-output processing is performed independently to obtain diversity, multiplexing, and array gain, and the peak-to-average power ratio of the communication system can be reduced.

It should be understood that in the embodiment of the present invention, the term "and/or" is merely an association relationship describing an associated object, indicating that there may be three relationships. For example, A and/or B may indicate that A exists separately, and A and B exist simultaneously, and B cases exist alone. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.

It should be understood that in the embodiment of the present invention, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, for clarity of hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of cells is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

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

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented in hardware, firmware implementation, or a combination thereof. When implemented in software, the functions described above may be stored in or transmitted as one or more instructions or code on a computer readable medium. Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A storage medium may be any available media that can be accessed by a computer. By way of example and not limitation, computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure. The desired program code and any other medium that can be accessed by the computer. Also. Any connection may suitably be a computer readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, Digital 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 fixing of the associated medium. As used in the present invention, a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disk, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.

In conclusion, the above is only a preferred embodiment of the technical solution of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method of processing a communication signal in a communication system, the method comprising:

Performing discrete Fourier transform DFT processing on the input data to obtain a DFT data sequence;

The DFT data sequence and the pilot sequence are orthogonally frequency division multiplexed in the same symbol.
The method according to claim 1, wherein the orthogonal frequency division multiplexing of the DFT data sequence and the pilot sequence in the same symbol comprises:

Mapping the pilot sequence to K subcarriers of the M subcarriers in the symbol according to a distributed mapping manner, where K is a positive integer less than or equal to MN, where M is a valid subcarrier within the symbol Number, N is the number of points processed by the DFT;

Mapping the DFT data sequence to N subcarriers of the M subcarriers within the symbol that are different from the K subcarriers.
The method according to claim 2, wherein the mapping the DFT data sequence to the N subcarriers different from the K subcarriers among the M subcarriers in the symbol comprises:

Mapping the DFT data sequence to the N subcarriers after phase rotation, wherein a phase rotation factor of the phase rotation is
S is the number of the subcarrier, and T is the number of fast Fourier transform IFFT points in the communication system.
The method according to claim 2 or 3, wherein the mapping the pilot sequence to the K subcarriers of the M subcarriers in the symbol according to a distributed mapping manner comprises:

Mapping the pilot sequence to the K subcarriers in such a manner that every L subcarriers are mapped to one subcarrier, and L is a positive integer greater than or equal to 1.
The method according to any one of claims 1 to 4, characterized in that the value of N is M/2.
A method of processing a communication signal in a communication system, the method comprising:

Performing N-point discrete Fourier transform DFT processing on the first data to obtain a first DFT data sequence, where the first data corresponds to the first group of user equipments, where N is less than M, and M is a system of the communication system The number of effective subcarriers included in the bandwidth, and M is a positive integer greater than one;

Performing K-point DFT processing on the second data to obtain a second DFT data sequence, the second data corresponding to the second group of user equipments, K being less than or equal to M-N;

And the first DFT data sequence and the second DFT data sequence are in the same symbol Row orthogonal frequency division multiplexing.
The method according to claim 6, wherein the orthogonal frequency division multiplexing of the first DFT data sequence and the second DFT data sequence in the same symbol comprises:

Mapping the first DFT data sequence to N subcarriers of the M subcarriers in the symbol according to a distributed mapping manner;

Mapping the second DFT data sequence to K subcarriers of the M subcarriers in the symbol except for the N subcarriers.
The method according to claim 7, wherein the mapping the second DFT data sequence to K of the M subcarriers in the symbol other than the N subcarriers On the carrier, including:

Performing phase rotation on the second DFT data sequence and mapping to K subcarriers of the M subcarriers in the symbol except for the N subcarriers;

Wherein the phase rotation factor of the phase rotation is
S is the number of the subcarrier, and T is the number of fast Fourier transform IFFT points in the communication system.
The method according to any one of claims 6 to 8, wherein the mapping of the first DFT data sequence to N subcarriers of M subcarriers within the symbol in a distributed mapping manner On, including:

Mapping the first DFT data sequence to the N subcarriers in such a manner that every L subcarriers are mapped to one subcarrier, and L is a positive integer greater than or equal to 1.
The method according to any one of claims 6 to 9, characterized in that the value of N is M/2.
An apparatus, comprising: a processor and a memory, the processor and the memory being connected by a bus system, the memory for storing instructions, the processor for executing instructions stored by the memory, such that The device performs the method of any one of claims 1 to 5.
An apparatus, comprising: a processor and a memory, the processor and the memory being connected by a bus system, the memory for storing instructions, the processor for executing instructions stored by the memory, causing the device to execute A method as claimed in any one of claims 6 to 10.