CN109391303B - Method and device for processing data - Google Patents

Method and device for processing data Download PDF

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CN109391303B
CN109391303B CN201710687242.6A CN201710687242A CN109391303B CN 109391303 B CN109391303 B CN 109391303B CN 201710687242 A CN201710687242 A CN 201710687242A CN 109391303 B CN109391303 B CN 109391303B
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matrix
preprocessing
processing
transmission layer
target
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CN109391303A (en
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吴艺群
徐修强
陈雁
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity

Abstract

The application provides a method and a device for processing data, which can reduce the interference of different transmission layers. The method comprises the following steps: mapping the modulation symbols onto at least one transmission layer; determining a first target preprocessing matrix in a preprocessing matrix set, wherein any two preprocessing matrices in the preprocessing matrix set are different; preprocessing the modulation symbol on the first transmission layer in the at least one transmission layer by using the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, wherein the preprocessing specifically comprises: y is W X, X represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix; and mapping the preprocessed modulation symbols on the first transmission layer on transmission resources to send to a receiving end.

Description

Method and device for processing data
Technical Field
The present embodiments relate to the field of communications, and in particular, to a method and an apparatus for transmitting data in the field of communications.
Background
With the development of network systems, the capacity of terminal devices is increasing day by day, and a multi-user multiple-input multiple-output (MIMO) technology can enable a plurality of terminal devices to transmit or receive data on the same time-frequency resource, a plurality of data streams of the plurality of terminal devices can be regarded as data streams of different antennas, and the data streams of different antennas correspond to different transmission layers, so that the throughput of data can be improved, the time-frequency resource can be saved, but how to reduce interference between different transmission layers is an urgent problem to be solved.
Disclosure of Invention
The application provides a method and a device for processing data, which can reduce the interference of data of different transmission layers.
In a first aspect, a method for processing data is provided, including: mapping the modulation symbols onto at least one transmission layer; determining a first target preprocessing matrix in a preprocessing matrix set, wherein any two preprocessing matrices in the preprocessing matrix set are different; preprocessing the modulation symbol on the first transmission layer in the at least one transmission layer by using the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, wherein the preprocessing specifically comprises: y is W X, X represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix; and mapping the preprocessed modulation symbols on the first transmission layer on transmission resources to send to a receiving end.
In the embodiment of the present application, any two preprocessing matrices in the set of preprocessing matrices are different, so that different transmission layers can select different preprocessing matrices for preprocessing, and interference of different transmission layers can be reduced.
It is to be appreciated that the modulation symbol can be at least one modulation symbol included in the data stream.
Alternatively, the preprocessing step in the Orthogonal Frequency Division Multiplexing (OFDM) technique may be after transport layer mapping and before spatial domain precoding.
Alternatively, in the discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) technique, the preprocessing step may be after the transport layer mapping and before the discrete fourier transform.
Optionally, the pre-processing matrix in the pre-processing matrix set is pre-processed by the modulation symbol sequence mapped by the transmission layer, and the pre-processing matrices of the mapped modulation symbol sequences of different transmission layers are different, so that interference between the transmission layer and the transmission layer can be reduced. Optionally, the sending end may be a terminal device, and one terminal device may generate modulation symbols of multiple transmission layers, or may generate only one modulation symbol of one transmission layer, and after the modulation symbols of multiple transmission layers generated by the terminal device are respectively preprocessed, data interference between different transmission layers is reduced. When a plurality of sending terminals send data to the same receiving terminal, the data sent by different sending terminals appear to belong to different transmission layers at the receiving terminal, and the interference between different sending terminals can be reduced after the data sent by each sending terminal is preprocessed.
Optionally, the sending end may be a network device, and the receiving end may be a terminal device; alternatively, the transmitting end may be a terminal device, and the receiving end may be a network device.
In certain implementations, the set of pre-processing matrices includes at least one sparse matrix, each column of the sparse matrix including at least one zero element. The elements close to zero can also be regarded as zero elements, when the matrix in the preprocessing matrix set includes a sparse matrix, and when the sparse matrix is used for processing the modulation symbols of the transmission layer, the zero elements in the sparse matrix can reduce or even eliminate the interference of the modulation symbols of the transmission layer on other transmission layers at the resource positions corresponding to the zero elements, and the process of performing de-preprocessing by the receiving end is relatively simple, so that the complexity of the system can be reduced.
In certain implementations, the first target pre-processing matrix is orthogonal to a first pre-processing matrix of the set of pre-processing matrices. Thus, when the first target preprocessing matrix is adopted to preprocess the first transmission layer and the first preprocessing matrix is adopted to preprocess the second transmission layer, the interference between the first transmission layer and the second transmission layer can be avoided.
In some implementations, the mapping the pre-processed modulation symbols on the first transport layer on transmission resources to send to a receiving end includes: carrying out precoding processing on the preprocessed modulation symbols on the first transmission layer to obtain precoded symbols; and mapping the pre-coded symbols on the transmission resources and sending the pre-coded symbols to the receiving end. It should be understood that the precoding may be a spatial domain coding.
In some implementations, the preprocessing the modulation symbol on the first transmission layer of the at least one transmission layer by using the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer includes: carrying out block processing on the modulation symbols on the first transmission layer to obtain a plurality of modulation symbols; and respectively preprocessing the plurality of modulation symbols by using the first target preprocessing matrix to obtain the preprocessed modulation symbols on the first transmission layer.
Optionally, the preprocessing matrix of each block of modulation symbols may be the same or different, and this is not limited in this embodiment of the application.
In certain implementations, the at least one transport layer is embodied as a plurality of transport layers, and accordingly, the method further includes: the sending end utilizes a second target preprocessing matrix in the preprocessing matrix set to carry out preprocessing operation on the modulation symbol on a second transmission layer in the at least one transmission layer to obtain a preprocessed modulation symbol on the second transmission layer; correspondingly, the mapping the preprocessed modulation symbols on the first transmission layer on the transmission resources to send to the receiving end includes: mapping the modulation symbol on the preprocessed first transmission layer and the modulation symbol on the preprocessed second transmission layer on the transmission resource to be sent to the receiving end; wherein the first target pre-processing matrix is the same as or different from the second target pre-processing matrix. That is, the sending end can use different target preprocessing matrixes to preprocess different transmission layers, and can reduce the interference of modulation symbols of different transmission layers.
In certain implementations, the method further includes: before the mapping of the modulation symbols on the preprocessed first transmission layer on the transmission resources is sent to a receiving end, or before the precoding processing is performed on the modulation symbols on the preprocessed first transmission layer, performing discrete fourier transform on the modulation symbols on the preprocessed first transmission layer to obtain a transformed modulation symbol sequence.
In some implementations, the modulation symbols include a real part and an imaginary part. In constructing the preprocessed input, the transmitting end may separate real and imaginary parts of the modulation symbols of the first transmission layer, for example, the real and imaginary parts of the modulation symbols are spaced apart, and the column width of the preprocessing matrix for processing the real and imaginary parts is twice the column width of the processed modulation symbols, so that the preprocessed diversity gain may be further obtained.
In some implementations, the sending end is a terminal device, and before determining the first target preprocessing matrix in the set of preprocessing matrices, the method further includes: receiving indication information sent by the network device, where the indication information is used to indicate the first target preprocessing matrix in the preprocessing set; wherein the determining a first target pre-processing matrix in the set of pre-processing matrices includes: and determining a first target preprocessing matrix from the preprocessing matrix set according to the indication information.
In certain implementations, the indication information is used to indicate an index of the first target pre-processing matrix in the set of pre-processing matrices, or the indication information is used to indicate a subset of pre-processing matrices in the set of pre-processing matrices and an index of the first target pre-processing matrix in the subset of pre-processing matrices.
In certain implementations, the indication information is used to indicate a modulation mode and an index of the first target pre-processing matrix in a set of pre-processing matrices corresponding to the modulation mode, or the indication information is used to indicate a waveform and an index of the first target pre-processing matrix in the set of pre-processing matrices corresponding to the waveform, or the indication information is used to indicate a modulation mode, a waveform and an index of the first target pre-processing matrix in the set of pre-processing matrices corresponding to the waveform and the modulation mode.
Optionally, a protocol specifies or a network device configures in advance a one-to-one correspondence between a modulation mode and a set of pre-processing matrices, for example, the correspondence may be referred to as a first correspondence, and when the indication information is used to indicate a modulation mode and an index of a first target pre-processing matrix in a set of pre-processing matrices corresponding to the modulation mode, the determining a first target pre-processing matrix from the set of pre-processing matrices according to the indication information includes: and determining a preprocessing matrix set corresponding to the modulation mode according to the modulation mode indicated by the indication information and the first corresponding relation, and determining a first target preprocessing matrix in the determined preprocessing matrix set according to the index.
Optionally, a protocol provides or a network device configures a waveform in advance and a set of preprocessing matrices in a one-to-one correspondence, for example, the correspondence may be referred to as a second correspondence, and when the indication information is used to indicate a waveform and an index of a first target preprocessing matrix in a set of preprocessing matrices corresponding to the waveform, the determining a first target preprocessing matrix from the set of preprocessing matrices according to the indication information includes: and determining a preprocessing matrix set corresponding to the waveform according to the waveform indicated by the indication information and the second corresponding relation, and determining a first target preprocessing matrix in the determined preprocessing matrix set according to the index.
Optionally, a protocol is specified or a network device configures a waveform in advance and a modulation mode has a one-to-one correspondence with a set of preprocessing matrices, for example, the correspondence may be referred to as a third correspondence, and when the indication information is used for a modulation mode, a waveform and an index of a first target preprocessing matrix in a set of preprocessing matrices corresponding to the waveform and the modulation mode, the determining a first target preprocessing matrix from the set of preprocessing matrices according to the indication information includes: and determining a preprocessing matrix set corresponding to the waveform according to the waveform and the modulation mode indicated by the indication information and the second corresponding relation, and determining a first target preprocessing matrix in the determined preprocessing matrix set according to the index.
In a second aspect, a method of processing data is provided, comprising: a receiving end receives a modulation symbol on a first transmission layer after preprocessing of a transmitting end mapping on transmission resources; the receiving end carries out de-preprocessing on the received preprocessed modulation symbols on the first transmission layer, wherein the de-preprocessing is X-W-1Y, Y characterizing the input of the solution pre-processing, X characterizing the output of the solution pre-processing, W-1The matrix is preprocessed for solution.
Alternatively, W-1It can be obtained from the inverse W transform in the first aspect, and if it is selected which matrix W is to be preprocessed in the first aspect, the inverse W of the matrix W is also selected for de-preprocessing-1Performing solution pretreatment, i.e. the solution pretreatment is the firstFor the sake of avoiding redundancy, the reverse process of the aspect is not illustrated here.
In a third aspect, an apparatus for transmitting information is provided, configured to perform the method in the first aspect or any possible implementation manner of the first aspect. In particular, the apparatus comprises means for performing the method of the first aspect described above or any possible implementation manner of the first aspect.
In a fourth aspect, there is provided an apparatus for transmitting information, the apparatus comprising: a transceiver, a memory, and a processor. Wherein the transceiver, the memory and the processor are in communication with each other via an internal connection path, the memory is configured to store instructions, the processor is configured to execute the instructions stored by the memory to control a receiver to receive signals and a transmitter to transmit signals, and when the instructions stored by the memory are executed by the processor, the execution causes the processor to perform the method of the first aspect or any possible implementation manner of the first aspect.
In a fifth aspect, there is provided a computer-readable storage medium having stored therein instructions, which, when run on a computer, cause the computer to perform a method as in the first aspect or any possible implementation manner of the first aspect.
In a sixth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect or any possible implementation manner of the first aspect.
In a seventh aspect, the present application provides a communication chip, in which instructions are stored, and when the instructions are executed on a transmitting end, the transmitting end is caused to execute the method according to the first aspect.
Drawings
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application.
Fig. 2 is a schematic view of an application scenario of an embodiment of the present application.
Fig. 3 is a schematic view of another application scenario according to an embodiment of the present application.
Fig. 4 is a schematic diagram of another application scenario of the embodiment of the present application.
Fig. 5 is a schematic diagram of another application scenario of the embodiment of the present application.
Fig. 6 is a schematic diagram of a method for processing data according to an embodiment of the present application.
Fig. 7 is a schematic block diagram of an apparatus for processing data according to an embodiment of the present application.
FIG. 8 is a schematic block diagram of another apparatus for processing data according to an embodiment of the present application.
Detailed Description
The technical solution in the present application is described below with reference to the accompanying drawings.
The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, a Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD) system, a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a future fifth Generation (5G) communication system, or a New Radio (NR) system.
For the understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail with reference to fig. 1. Fig. 1 shows a schematic diagram of a communication system suitable for the method and apparatus for data transmission of the embodiments of the present application. As shown in fig. 1, the communication system 100 includes a network device 102, and the network device 102 may include a plurality of antennas, e.g., antennas 104, 106, 108, 110, 112, and 114. Additionally, network device 102 can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art.
It should be understood that the network device may be a Base Transceiver Station (BTS) in global system for mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved node B (eNB or eNodeB) in Long Term Evolution (LTE), or a relay Station, an access point or a Radio Remote Unit (RRU), or a vehicle-mounted device, a wearable device, and a network-side device in a future 5G system, such as a Transmission Point (TP), a Transmission Reception Point (TRP), a Base Station, a small Base Station device, and the like, which is not particularly limited in this embodiment.
Network device 102 may communicate with a plurality of terminal devices, such as terminal device 116 and terminal device 122. Network device 102 may communicate with any number of terminal devices similar to terminal devices 116 or 122.
It should be understood that a terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device may be a Station (ST) in a Wireless Local Area Network (WLAN), and may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with a wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in a 5G network or a terminal device in a future-evolution Public Land Mobile Network (PLMN) network, and the like, which is not particularly limited in this embodiment of the present application.
As shown in fig. 1, terminal device 116 is in communication with antenna 112 and/or antenna 114 of network device 102, wherein signals transmitted by antenna 112 and/or antenna 114 are transmitted to terminal device 116 over forward link 118 and signals transmitted by terminal device 116 over reverse link 120 are received. In addition, terminal device 122 is in communication with antennas 104 and/or 106, where signals transmitted by antennas 104 and/or 106 are transmitted to terminal device 122 over forward link 124 and signals transmitted by terminal device 122 over reverse link 126 are received.
In a Frequency Division Duplex (FDD) system, forward link 118 may utilize a different frequency band than that used by reverse link 120, and forward link 124 may utilize a different frequency band than that used by reverse link 126, for example.
As another example, in Time Division Duplex (TDD) systems and full duplex (full duplex) systems, forward link 118 and reverse link 120 may utilize a common frequency band and forward link 124 and reverse link 126 may utilize a common frequency band.
Each antenna (or group of antennas consisting of multiple antennas) and/or area designed for communication is referred to as a sector of network device 102. For example, antenna groups may be designed to communicate to terminal devices in a sector of the area covered by network device 102. During communication by network device 102 with terminal devices 116 and 122 over forward links 118 and 124, respectively, the transmitting antennas of network device 102 may utilize beamforming to improve signal-to-noise ratio of forward links 118 and 124. Moreover, mobile devices in neighboring cells can experience less interference when network device 102 utilizes beamforming to transmit to terminal devices 116 and 122 scattered randomly through an associated coverage area, as compared to a manner in which a network device transmits through a single antenna to all its terminal devices.
Network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting apparatus and/or a wireless communication receiving apparatus. When sending data, the wireless communication sending device may process the data for transmission.
Furthermore, the communication system 100 may be a Public Land Mobile Network (PLMN) network or a device to device (D2D) network or a machine to machine (M2M) network or other networks, which is illustrated in fig. 1 for ease of understanding only, and other network devices may be included in the network, which are not shown in fig. 1.
For example, the sending end in the embodiment of the present application may be the terminal device 116 or the terminal device 122, and the receiving end may be the network device 102; for another example, the sending end in this embodiment may be the network device 102, and the receiving end may be the terminal device 116 or the terminal device 122, but this is not limited in this embodiment, and both the sending end and the receiving end may be terminal devices in a device to device (D2D) scenario, or the sending end or the receiving end may be a relay device in a scenario with a relay device.
For the convenience of understanding the embodiment of the present application, a schematic diagram of a process for processing data in an OFDM system is briefly described below with reference to fig. 2. The object of processing is a codeword.
In the first step, a sender first scrambles or interleaves a codeword (code word) to generate scrambled bits or interleaved bits. Scrambling is an exclusive-or operation of bits in a code block with a sequence of bits having the same length as the number of bits in the code block, and interleaving refers to reordering of the bits in the code block. In general, this step may employ one of scrambling or interleaving, or a combination of scrambling and interleaving, including operations of scrambling followed by interleaving or interleaving followed by scrambling, or no scrambling or interleaving.
And a second step of mapping the scrambled bits or interleaved bits of the first step into modulation symbols, wherein common mapping manners include a Binary Phase Shift Keying (BPSK) modulation mode, a pi/2-BPSK modulation mode, a Quadrature Phase Shift Keying (QPSK) modulation mode, a pi/4-QPSK modulation mode, a 16 Quadrature Amplitude Modulation (QAM), a 64QAM, a 256QAM, and the like.
And thirdly, mapping the modulation symbol sequence corresponding to each code block to one or more spatial transmission layers. Transport layer mapping is typically used in the case of multi-antenna transmission. If the terminal device uses single antenna transmission, there is at most one spatial transmission layer.
The fourth step is toAnd carrying out space pre-coding processing on the modulation symbols after the mapping of the transmission layer, and mapping the modulation symbols after the pre-processing of different transmission layers to different antenna ports. Assuming V spatial transmission layers and P antenna ports, the corresponding spatial domain precoding can be expressed as formula (1), where V is a precoding matrix, and V is P × V, y(0)(i),y(1)(i),…y(v-1)(i) Modulation symbols for v spatial transmission layers, z(0)(i),z(1)(i),…z(P-1)(i) Are precoded modulation symbols.
Figure BDA0001377050180000061
And fifthly, mapping the precoded modulation symbols to a plurality of Resource Elements (REs) through RE mapping. These REs are then Orthogonal Frequency Division Multiplexing (OFDM) modulated to generate OFDM symbols. The OFDM symbols are then transmitted through an antenna port (antenna port).
Further, for understanding the embodiment of the present application, a schematic diagram of a process for processing data in the DFT-s-OFDM system is briefly described below with reference to fig. 3. Fig. 3 is different from fig. 2 in that the modulation symbols on the transmission layer after the transmission layer mapping of the third step are subjected to Discrete Fourier Transform (DFT), the symbols after DFT are mapped on a plurality of REs, the REs are OFDM-modulated to generate DFT-s-OFDM symbols, and the DFT-s-OFDM symbols are transmitted through antenna ports. The above processing modes in the OFDM system and the DFT-s-OFDM system can be regarded as processing modes for generating two different waveforms.
In the scenario of fig. 2 or fig. 3, data between different transmission layers has interference, and therefore, in the embodiment of the present application, as shown in fig. 4, different from fig. 2, it is possible to perform preprocessing on a modulation symbol on a transmission layer after mapping of the transmission layer in fig. 2 by using a preprocessing matrix, and different transmission layers perform preprocessing by using different preprocessing matrices, so that interference of the modulation symbol between the transmission layer and the transmission layer can be reduced. Optionally, as shown in fig. 5, as different from fig. 3, in the embodiment of the present application, a modulation symbol on a transmission layer after mapping of the transmission layer in fig. 3 may be preprocessed by using a preprocessing matrix to obtain a preprocessed modulation symbol on the transmission layer, and then DFT conversion is performed on the preprocessed modulation symbol on the transmission layer, where different transmission layers use different preprocessing matrices for processing, so that interference of the modulation symbol between the transmission layer and the transmission layer may be reduced. The following describes a method for processing data in an embodiment of the present application in detail with reference to the drawings.
Fig. 6 shows a method 200 for processing data according to an embodiment of the present application, where the method may be performed by a transmitting end, and the method 200 includes:
and S210, mapping the modulation symbols to at least one transmission layer. For example, S210 may be the transport layer mapping step in fig. 4 and 5.
S220, determining a first target preprocessing matrix in a preprocessing matrix set, wherein any two preprocessing matrices in the preprocessing matrix set are different.
Optionally, the set of pre-processing matrices includes at least one sparse matrix, each column of the sparse matrix includes at least one zero element, or those elements close to zero can be regarded as zero elements. When the matrix in the preprocessing matrix set comprises a sparse matrix, and when the sparse matrix is used for processing the modulation symbol of the transmission layer, the zero element in the sparse matrix can weaken the symbol multiplied by the zero element in the modulation symbol, so that the interference with other transmission layer data can be reduced, and the process of performing de-preprocessing by the receiving end is relatively simple, so that the complexity of the system can be reduced.
Optionally, two orthogonal pre-processing matrices exist in the set of pre-processing matrices, for example, a first target pre-processing matrix is orthogonal to the first pre-processing matrix, so that when the first target pre-processing matrix is used to pre-process the first transmission layer and the first pre-processing matrix is used to pre-process the second transmission layer, interference between the first transmission layer and the second transmission layer can be avoided.
Optionally, if the sending end is a first terminal device, the first terminal device may map the modulation symbols on one or more transmission layers, and if the first terminal device maps the modulation symbols on multiple transmission layers, the multiple transmission layers may perform preprocessing by using multiple different preprocessing matrices in the set of preprocessing matrices, so as to avoid symbol interference between different transmission layers of the first terminal device; similarly, the first sending end may be a first terminal device, the second sending end may be a second terminal device, the first terminal device may map modulation symbols on one transmission layer, the first terminal device may map modulation symbols on the transmission layer using a first pre-processing matrix, the second terminal device may map modulation symbols on another transmission layer, the second terminal device may map modulation symbols on the transmission layer using a second pre-processing matrix, and the first pre-processing matrix is different from the second pre-processing matrix, so that interference of transmission layers of different first terminal devices and transmission layers of the second terminal device may be reduced.
Optionally, at the receiving end, if the data of different transmission layers of one terminal device or the data of transmission layers of different terminal devices can be well distinguished through a spatial domain, that is, the interference between different transmission layers is small, the same preprocessing matrix may also be used when preprocessing each transmission layer. That is, the division of the spatial domain can reduce the interference of different transmission layers, and therefore, different transmission layers may use the same preprocessing matrix, which is not limited in the embodiments of the present application.
As an example, the set of pre-processing matrices includes pre-processing matrices shown in at least one of table 1, table 2, table 3, table 4, and table 5, for example. The preprocessing matrix in table 1 is a 4 × 1 matrix, and accordingly, one modulation symbol may be mapped to four modulation symbols; the pre-processing matrix in tables 2 and 3 is a 4 × 2 matrix, and accordingly, two modulation symbols may be mapped to four modulation symbols; the pre-processing matrix in table 4 is a 4 × 3 matrix, and accordingly, three modulation symbols may be mapped to four modulation symbols; the pre-processing matrix in table 5 is a 4 × 4 matrix, and accordingly, four modulation symbols may be mapped to four modulation symbols. For example, the preprocessing matrices corresponding to the preprocessing matrix indexes 0 to 15 in table 1 are sparse matrices, wherein the sparsity of each column of the preprocessing matrices corresponding to the preprocessing matrix indexes 0 to 11 is 2 (each column has 2 zero elements), and the sparsity of each column of the preprocessing matrices corresponding to the preprocessing matrix indexes 12 to 15 is 3 (each column has 3 zero elements); the preprocessing matrixes corresponding to the preprocessing matrix indexes 0-23 in table 2 are sparse matrixes, wherein the sparsity of each column of the preprocessing matrixes corresponding to the preprocessing matrix indexes 0-11 is 3 (each column has 3 zero elements), and the sparsity of each column of the preprocessing matrixes corresponding to the preprocessing matrix indexes 12-23 is 2 (each column has 2 zero elements); the preprocessing matrices corresponding to the preprocessing matrix indexes 0 to 11 in tables 3, 4 and 5 are sparse matrices, and the sparsity of each column of the preprocessing matrices corresponding to the preprocessing matrix indexes 0 to 11 is 2 (each column has 2 zero elements). Positions of non-zero elements corresponding to different preprocessing matrixes in the same table with the same sparsity are different.
TABLE 1
Figure BDA0001377050180000081
TABLE 2
Figure BDA0001377050180000082
Figure BDA0001377050180000091
TABLE 3
Figure BDA0001377050180000092
TABLE 4
Figure BDA0001377050180000093
TABLE 5
Figure BDA0001377050180000101
It should be understood that tables 1 to 5 are merely exemplary of possible forms of the preprocessing matrix, but the embodiments of the present invention are not limited thereto, and may also include corresponding sequences of Gold codes, Zadoff-Chu codes, Walsh codes, PN codes, golay complementary codes, etc. in the prior art, and the corresponding sequences of these codes form the preprocessing matrix according to a certain rule.
Optionally, how to determine the first target preprocessing matrix in the preprocessing matrix set may be in a manner specified by a protocol, assuming that the sending end is a terminal device, the preprocessing matrix set includes a plurality of preprocessing matrices, and each preprocessing matrix has a unique index. Or, assuming that the transmitting end is a terminal device,
if the receiving end is a network device, the terminal device may receive indication information sent by the network device, where the indication information is used to indicate the first target preprocessing matrix in the preprocessing matrix set, S220 includes: and the terminal equipment determines the first target preprocessing matrix in the preprocessing matrix set according to the indication information. Specifically, the indication information may indicate the first target preprocessing matrix in the following five ways.
In a first manner, assuming that each pre-processing matrix included in the pre-processing matrix set has a unique index value, the indication information may indicate an index of the first target pre-processing matrix, so that the terminal device may determine the first target pre-processing matrix according to the index of the first target pre-processing matrix. For example, the set of preprocessing matrices includes the preprocessing matrices in table 1, and if the index of the first target preprocessing matrix indicated by the first indication information is 5, the first target preprocessing matrix is the last matrix corresponding to the index 5 in the second row. For another example, all the preprocessing matrices in tables 1 to 5 may be uniformly indexed, and the indication information may indicate that any one of the matrices in tables 1 to 5 is the first target preprocessing matrix.
In a second manner, assuming that the set of preprocessing matrices includes a plurality of subsets of preprocessing matrices, each preprocessing matrix in each subset of preprocessing matrices has a unique index in the subset of preprocessing matrices, and the indication information may indicate the subset of preprocessing matrices and the index of the first target preprocessing matrix in the subset of preprocessing matrices. For example, each set in tables 1 to 5 may have an index, the pre-processing matrix in each table in tables 1 to 5 may have an index in the table, the indication information may indicate one table and an index indicating the pre-processing matrix in the table, for example, the pre-processing matrix subset may be divided by the size of the matrix, assuming that the pre-processing matrix subset includes tables 1, 2, 4 and 5, if the size of the pre-processing matrix is L × M, the indication pre-processing matrix subset may be indicated by L and M, for example, the pre-processing matrix in table 1 is 4 × 1, the pre-processing matrix in table 2 is 4 × 2, the pre-processing matrix in table 4 is 4 × 3, the pre-processing matrix in table 5 is 4 × 4, the indication information indicates that the pre-processing matrix subset is L ═ 4 and M ═ 4 and the index of the first target pre-processing matrix in the pre-processing matrix subset is 5, the terminal device may determine that the first target pre-processing matrix is the last matrix of the second row in table 5.
In a third manner, assuming that there are multiple sets of pre-processing matrices, each set of pre-processing matrices corresponds to one modulation mode, different sets of pre-processing matrices may correspond to different modulation modes, each pre-processing matrix in each set of pre-processing matrices has a unique index in the set of pre-processing matrices, and the indication information may indicate the modulation mode and the index of the first target pre-processing matrix in the set of pre-processing matrices corresponding to the modulation mode. For example, the size of the preprocessing matrices in tables 2 and 3 is 4 × 2, and assuming that table 2 corresponds to QPSK modulation table 3 and BPSK modulation, the indication information indicates that the modulation mode is BPSK, and the index of the first target preprocessing matrix in the set of preprocessing matrices corresponding to the BPSK modulation mode is 6, the terminal device may determine that the first target preprocessing matrix is the first matrix in the third row (three rows in total in table 3) in table 3.
In a fourth way, assuming that there are multiple sets of preprocessing matrices, each set of preprocessing matrices corresponds to a waveform, different sets of preprocessing matrices may correspond to different waveforms, each preprocessing matrix in each set of preprocessing matrices has a unique index in the set of preprocessing matrices, and the indication information may indicate the waveform and the index of the first target preprocessing matrix in the set of preprocessing matrices corresponding to the waveform. For example, the size of the preprocessing matrices in table 1 and table 6 is 4 × 1, and assuming that table 1 corresponds to an OFDM waveform, table 6 corresponds to a DFT-s-OFDM waveform, the indication information indicates that the waveform is DFT-s-OFDM, and the index of the first target preprocessing matrix in the corresponding subset of preprocessing matrices is 1, the terminal device may determine that the first target preprocessing matrix is the second matrix in row 2 in table 6 (four rows in table 6).
In a fifth way, assuming that there are multiple sets of preprocessing matrices, each set of preprocessing matrices corresponds to one waveform and modulation mode, different preprocessing matrices may correspond to different waveforms and modulation modes, each preprocessing matrix in each set of preprocessing matrices has a unique index in the set of preprocessing matrices, and the indication information may indicate the waveform and modulation mode and the index of the first target preprocessing matrix in the subset of preprocessing matrices corresponding to the waveform and modulation mode. For example, if table 2 corresponds to OFDM waveforms and QPSK modulation, table 3 corresponds to OFDM waveforms and BPSK modulation, table 6 corresponds to DFT-s-OFDM waveforms and QPSK modulation, and table 7 corresponds to DFT-s-OFDM waveforms and BPSK modulation, if the indication information indicates that the waveforms are DFT-s-OFDM, the modulation mode is QPSK, and the index of the first target pre-processing matrix in the corresponding pre-processing matrix subset is 5, the terminal device may determine that the first target pre-processing matrix is the last matrix in row 2 in table 6 (four rows in total in table 6).
Optionally, the network device may send the indication information to the terminal device through downlink control information or high transport layer signaling.
Optionally, for multi-antenna transmission, there may be multiple transmission layers, and the pre-processing matrix corresponding to each transmission layer may be different, so that the indication information may indicate that one pre-processing matrix is a pre-processing matrix of one transmission layer, and a matrix continuously indexed with the pre-processing matrix is a pre-processing matrix of another transmission layer, for example, assuming that the index of the pre-processing matrix of the first transmission layer is 1, and assuming that there are 3 transmission layers in total, the index of the pre-processing matrix of the second transmission layer is 2, and the index of the pre-processing matrix of the third transmission layer is 3.
S230, preprocessing the modulation symbol on the first transmission layer in the at least one transmission layer by using the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, where the preprocessing specifically is: and Y represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix. Alternatively, S230 may be a preprocessing operation in fig. 4 or 5.
It will be appreciated that the number of columns of W is equal to the number of rows of X.
As an example, assume that there are v transport layers, v is an integer greater than or equal to 1, and the symbols on the first transport layer of the v transport layers are X (0) … X (M-1), where M is the number of modulation symbols on the first transport layer, i.e., X is (X (0) … X (M-1))TWhen W is a matrix of lxm and L is called spreading length, Y is a matrix of lx1 after Y is W X, for example, L is 4 and M is 1 in table 1; l ═ 4, M ═ 2 in table 2; l ═ 4, M ═ 2 in table 3; in table 4, L is 4, M is 3; in table 5, L is 4 and M is 1. Optionally, the v transport layers have different pre-processing matrices for each transport layer, which can reduce interference between transport layers. Alternatively, L may be equal to M. Alternatively, when L is equal to M, W may be an identity matrix, that is, a modulation symbol on the first transmission layer after data of the first transmission layer is preprocessed by using the identity matrix W may be equal to a modulation symbol on the first transmission layer before the preprocessing.
Optionally, S230, includes: carrying out block processing on the modulation symbols on the first transmission layer to obtain a plurality of modulation symbols; and respectively preprocessing the plurality of modulation symbols by utilizing the first target preprocessing matrix to obtain the preprocessed modulation symbols on the first transmission layer.
As an example, the modulation symbols x (0) … x (M-1) on the first transmission layer may be partitioned, for example, uniform partitioning may be performed in the order of the modulation symbols, for example, M modulation symbols are partitioned into M/K blocks, each block has K modulation symbols x (i) … x (i + K-1), and W is an L × K matrix, each modulation symbol may be preprocessed separately, and may be represented by formula (2), each modulation symbol may use a different preprocessing matrix, or M/K block modulation symbols on the first transmission layer use the same preprocessing matrix, for example, M/K block modulation symbols are preprocessed separately using the first target preprocessing matrix.
Figure BDA0001377050180000121
Optionally, the at least one transmission layer is specifically a plurality of transmission layers, and accordingly, the method 200 further includes: the sending end utilizes a second target preprocessing matrix in the preprocessing matrix set to carry out preprocessing operation on the modulation symbol on a second transmission layer in the at least one transmission layer to obtain a preprocessed modulation symbol on the second transmission layer; correspondingly, the mapping the preprocessed modulation symbols on the first transmission layer on the transmission resources to send to the receiving end includes: mapping the modulation symbol on the preprocessed first transmission layer and the modulation symbol on the preprocessed second transmission layer on the transmission resource to be sent to the receiving end; wherein the first target pre-processing matrix is the same as or different from the second target pre-processing matrix. That is, the sending end can preprocess different transmission layers by using different target preprocessing matrixes, and can reduce mutual interference between modulation symbols of different transmission layers. For example, the first target pre-processing matrix may be orthogonal to the second target pre-processing matrix (i.e., the inner product of each column of the first target pre-processing matrix and each column of the second target pre-processing matrix is 0), so that mutual interference between modulation symbols on the first transmission layer and modulation symbols on the second transmission layer may be avoided. For another example, the first target pre-processing matrix may be a first sparse matrix, the second pre-processing matrix may be a second sparse matrix, and a zero element in the first sparse matrix is located at a different position from a zero element in the second sparse matrix, so that the zero element in the first sparse matrix may weaken a symbol multiplied by the zero element in a modulation symbol on the first transmission layer, and the zero element in the second sparse matrix may reduce or even eliminate interference of the modulation symbol of the transmission layer on other transmission layers at a resource location corresponding to the zero element.
As an alternative embodiment, the modulation symbols comprise a real part and an imaginary part. Thus, in S230, when constructing the preprocessed input X, the real part and the imaginary part of the modulation symbol may be processed separately, for example, the real part of the modulation symbol X represents real (X), and the imaginary part represents imag (X), then the preprocessing operation may be performed by formula (3), where W in formula (3) is a matrix of L × 2K, where K represents the number of modulation symbols, and L is the number of preprocessed modulation symbols. Alternatively, the preprocessing operation can be performed using equation (4). For example, the pre-processing matrix in table 3 may be the pre-processing matrix in equation (3) or equation (4), such that one modulation symbol at a time can be processed for the 4 × 2 pre-processing matrix in table 3, the real part and the imaginary part of the modulation symbol are separately processed when the transmitting end performs pre-processing, and four modulation symbols after being processed by the pre-processing matrix in table 3 include two zero elements. If the same modulation symbol x needs to be preprocessed, W in formula (3) can be obtained by row transformation of W in formula (4), or W in formula (4) can be obtained by row transformation of W in formula (3). The real part and the imaginary part of the modulation symbol are respectively processed by the formula (3) or the formula (4), so that the diversity gain of the real part and the diversity gain of the imaginary part can be respectively obtained, and the preprocessed diversity gain can be further obtained.
Figure BDA0001377050180000131
Figure BDA0001377050180000132
Alternatively, if K QPSK modulation symbols are preprocessed, the preprocessing matrix that processes the K QPSK modulation symbols may process 2K BPSK modulation symbols, for example, in table 3, for BPSK modulation, K is 2, L is 4, i.e., one preprocessing can process two BPSK modulation symbols, for QPSK modulation, the modulation symbols of QPSK are 2 times of the modulation symbols of BPSK, and therefore, for QPSK modulation, K is 1, L is 4, the number of QPSK modulation symbols processed by the preprocessing matrix in table 3 is half of the number of BPSK modulation symbols processed.
S240, mapping the preprocessed modulation symbol on the first transmission layer on a transmission resource, and sending the transmission resource to a receiving end.
Optionally, S240, includes: carrying out precoding processing on the preprocessed modulation symbols on the first transmission layer to obtain precoded symbols; and mapping the pre-coded symbols on the transmission resources and sending the pre-coded symbols to the receiving end. That is, the precoding process may be the spatial precoding process in fig. 4, except that the symbol of the first transmission layer in the precoded object is specifically a modulation symbol on the first transmission layer after being preprocessed in this embodiment of the present application. Or the precoding process may be space-domain coding in fig. 5, except that the symbol of the first transmission layer in the precoded object is specifically a modulation symbol obtained by performing DFT on the modulation symbol on the first transmission layer in this embodiment of the present application.
Optionally, the method 200 further comprises: before the modulation symbol on the preprocessed first transmission layer is mapped on a transmission resource and sent to a receiving end, or before the modulation symbol on the preprocessed first transmission layer is precoded, the sending end performs discrete fourier transform on the modulation symbol on the preprocessed first transmission layer to obtain a transformed modulation symbol sequence. That is, the step of DFT conversion in fig. 5, DFT conversion may enable a transmission signal to have a single-carrier characteristic, and the transmitting end may perform DFT conversion on the modulation symbol on the preprocessed first transmission layer, or may perform DFT conversion on the modulation symbol on the preprocessed first transmission layer and the modulation symbol on the preprocessed second transmission layer. Or performing DFT on the preprocessed modulation symbols on each transmission layer on at least one transmission layer. Specifically, assuming that the first transmission layer includes M modulation symbols, the M modulation symbols are divided into M/K blocks, each block has K modulation symbols, and the K modulation symbols of each block are preprocessed by using an L × K preprocessing matrix to obtain L modulation symbols, the preprocessed first transmission layer includes ML/K modulation symbols, the ML/K modulation symbols are divided into ML/(NK) sets, the modulation symbols of each set correspond to one SC-FDMA symbol, N represents the number of subcarriers, DFT conversion is the same as that in LTE, and DFT conversion is performed by using the number of subcarriers N.
Alternatively, for the modulation symbols that need to be DFT-transformed, a specific pre-processing matrix may be selected, so that the energy of the frequency domain signal obtained by DFT-transformation is relatively concentrated, which may further reduce Peak-to-Average Ratio (Peak-to-Average Ratio). For example, the selected specific set of pre-processing matrices may include the pre-processing matrices in table 6 and/or table 7, and the frequency spectrums corresponding to the pre-processing matrices in table 6 and table 7 are relatively concentrated, so that the pre-processing matrix corresponding to the frequency spectrum set is used to pre-process the modulation symbols on the first transmission layer to obtain the pre-processed modulation symbols on the first transmission layer, and then the pre-processed modulation symbols on the first transmission layer are subjected to DFT conversion, where the DFT conversion is to reduce the peak-to-average ratio of the transmission signal. Therefore, it is assumed that the peak-to-average ratio of the transmission signal can be further reduced by performing the preprocessing using the preprocessing matrix similar to that corresponding to table 6 and/or table 7.
TABLE 6
Figure BDA0001377050180000141
TABLE 7
Figure BDA0001377050180000142
Figure BDA0001377050180000151
Alternatively, a L K pre-processing matrix pair is utilizedAfter the M modulation symbols are preprocessed, the number of modulation symbols becomes ML/K, i.e. the preprocessed modulation symbols are L/K times as many as before the preprocessing. Suppose the number of allocated physical resource blocks is N'PRBWhen the preprocessing matrix of L × K is adopted for preprocessing, the Transport Block Size (TBS) used in the encoding process can be determined according to the TBS index and the equivalent physical resource block number NPRBA table lookup (e.g., a lookup of an existing TBS table) is performed. Number of equivalent physical resource blocks NPRBCan be obtained according to the formula (5)
Figure BDA0001377050180000152
Wherein the content of the first and second substances,
Figure BDA0001377050180000153
indicating a lower rounding.
Therefore, the method for processing data provided in the embodiment of the present application selects different preprocessing matrices to preprocess modulation symbols mapped by different transmission layers, so as to reduce interference between the transmission layers and facilitate obtaining diversity gain. And, when the modulation symbol includes a real part and an imaginary part, the real part and the imaginary part can be separately processed, and more diversity gain can be obtained. Further, when the orthogonal pre-processing matrix exists in the pre-processing matrix set, when the sending end selects the orthogonal pre-processing matrix to process the modulation symbols of different transmission layers, the interference between different transmission layers can be reduced. Furthermore, when the sparse matrix exists in the preprocessing matrix set, and the transmitting end selects the sparse matrix to preprocess the first transmission layer, the interference of the first transmission layer to other transmission layers can be reduced, and the preprocessing process of the receiving end can be simplified.
Alternatively, the process of the de-preprocessing at the receiving end may be: a receiving end receives a modulation symbol on a first transmission layer after preprocessing of a transmitting end mapping on transmission resources; the receiving end carries out de-preprocessing on the received preprocessed modulation symbols on the first transmission layer, wherein the de-preprocessing is specifically thatX＝W-1Y, Y characterizing the input of the solution pre-processing, X characterizing the output of the solution pre-processing, W-1To solve the pre-processing matrix, W-1Which matrix W is selected for preprocessing in method 200, then the inverse W of that matrix W is also selected for de-preprocessing, which may be derived from the inverse W transform in method 200-1Performing de-preprocessing, that is, de-preprocessing is the reverse process of the method 200, and for avoiding redundancy, no example is given here.
The method of processing data according to the embodiment of the present application is described in detail above with reference to fig. 2 to 6, and the apparatus of processing data according to the embodiment of the present application will be described below with reference to fig. 7 and 8.
Fig. 7 is a schematic block diagram of an apparatus 300 for processing data according to an embodiment of the present application, which may be a transmitting end in the method 200. As shown in fig. 7, the apparatus 300 includes: a processing unit 310 and a transceiving unit 320, wherein
A processing unit 310, configured to map modulation symbols onto at least one transmission layer;
the processing unit 310 is further configured to determine a first target pre-processing matrix in a set of pre-processing matrices, where any two pre-processing matrices in the set of pre-processing matrices are different;
the processing unit 310 is further configured to perform preprocessing on the modulation symbol on the first transmission layer in the at least one transmission layer through the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, where the preprocessing specifically is: y is W X, X represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix;
a transceiving unit 320, configured to map the preprocessed modulation symbols on the first transmission layer on transmission resources and send the transmission resources to a receiving end.
As an alternative embodiment, the set of pre-processing matrices includes at least one sparse matrix, each column of the sparse matrix including at least one zero element.
As an alternative embodiment, the first target pre-processing matrix is orthogonal to a first pre-processing matrix of the set of pre-processing matrices.
As an alternative embodiment, the processing unit 310 is further configured to: carrying out precoding processing on the preprocessed modulation symbols on the first transmission layer to obtain precoded symbols; the sending unit 320 is specifically configured to: and mapping the pre-coded symbols on the transmission resources and sending the pre-coded symbols to the receiving end.
As an optional embodiment, the processing unit 310 is specifically configured to: carrying out block processing on the modulation symbols on the first transmission layer to obtain a plurality of modulation symbols; and respectively preprocessing the plurality of modulation symbols by using the first target preprocessing matrix to obtain the preprocessed modulation symbols on the first transmission layer.
As an optional embodiment, the at least one transport layer is specifically a plurality of transport layers, and accordingly, the processing unit 310 is further configured to: utilizing a second target preprocessing matrix in the preprocessing matrix set to perform preprocessing operation on the modulation symbol on a second transmission layer in the at least one transmission layer to obtain a preprocessed modulation symbol on the second transmission layer;
the transceiver unit 320 is further configured to: mapping the modulation symbol on the preprocessed first transmission layer and the modulation symbol on the preprocessed second transmission layer on the transmission resource to be sent to the receiving end; wherein the first target pre-processing matrix is the same as or different from the second target pre-processing matrix.
As an alternative embodiment, the processing unit 310 is further configured to: before the preprocessed modulation symbols on the first transmission layer are mapped on transmission resources and sent to a receiving end, discrete Fourier transform is carried out on the preprocessed modulation symbols on the first transmission layer to obtain a transformed modulation symbol sequence.
As an alternative embodiment, the modulation symbols comprise a real part and an imaginary part.
As an alternative embodiment, the apparatus is a terminal device, and the transceiver unit 320 is further configured to: before a first target preprocessing matrix is determined in a preprocessing matrix set, receiving indication information sent by the network device, where the indication information is used to indicate the first target preprocessing matrix in the preprocessing set; the processing unit 310 is specifically configured to: and determining a first target preprocessing matrix from the preprocessing matrix set according to the indication information.
As an optional embodiment, the indication information is used to indicate an index of the first target pre-processing matrix in the pre-processing matrix set, or the indication information is used to indicate a pre-processing matrix subset in the pre-processing matrix set and an index of the first target pre-processing matrix in the pre-processing subset.
As an optional embodiment, the indication information indicates a modulation mode and an index of the first target pre-processing matrix, and accordingly, the processing unit 310 is further specifically configured to: determining the preprocessing matrix indicated by the index in the preprocessing matrix set corresponding to the modulation mode as the target preprocessing matrix; or
The indication information indicates a waveform and an index of the first target preprocessing matrix, and accordingly, the processing unit 310 is further configured to: determining a preprocessing matrix indicated by the index in a preprocessing matrix set corresponding to the waveform as the target preprocessing matrix; alternatively, the first and second electrodes may be,
the indication information indicates a modulation mode, a waveform, and an index of the first target pre-processing matrix, and accordingly, the processing unit 310 is further specifically configured to: and determining the preprocessing matrix indicated by the index in the preprocessing matrix set corresponding to the combination of the waveform and the modulation mode as the target preprocessing matrix.
It should be understood that the apparatus 300 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 (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, as can be understood by those skilled in the art, the apparatus 300 may be specifically a sending end in the foregoing embodiment, and the apparatus 300 may be configured to execute each procedure and/or step corresponding to the sending end in the foregoing method embodiment, and for avoiding repetition, details are not described here again.
The apparatus 300 corresponds to the transmitting end in the method embodiment, and the corresponding units execute corresponding steps, for example, the transmitting unit executes the steps transmitted in the method embodiment, the receiving unit executes the steps received in the method embodiment, and other steps except for transmitting and receiving may be executed by the processing unit. The functions of the specific elements may be referred to corresponding method embodiments and will not be described in detail.
The transmitting end of each scheme has the function of realizing the corresponding steps executed by the transmitting end in the method; the functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software comprises one or more units corresponding to the functions; for example, the transmitting unit may be replaced by a transmitter, the receiving unit may be replaced by a receiver, other modules, such as a processing unit and the like, may be replaced by a processor, and the transmitting operation, the receiving operation and the related processing operation in the respective method embodiments are respectively performed.
Fig. 8 is a schematic block diagram of an apparatus 400 for processing data according to an embodiment of the present application, which may be, for example, a transmitting end in the method 200. As shown in fig. 8, the apparatus 800 includes a transceiver 410, a processor 420, and a memory 430. The memory 430 is used for storing instructions, and the processor 420 is used for executing the instructions stored by the memory 430 to control the transceiver 410 to receive signals or transmit signals.
Wherein the processor 420 is configured to map the modulation symbols onto at least one transmission layer; the processor 420 is further configured to determine a first target pre-processing matrix in a set of pre-processing matrices, where any two pre-processing matrices in the set of pre-processing matrices are different; the processor 420 is further configured to perform preprocessing on the modulation symbol on the first transmission layer in the at least one transmission layer through the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, where the preprocessing specifically is: y is W X, X represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix; the transceiver 410 is configured to map the preprocessed modulation symbols on the first transmission layer on transmission resources to transmit to a receiving end.
It should be understood that the apparatus 400 may be embodied as a transmitting end in the embodiment related to the method 200, and may be configured to perform each step and/or flow corresponding to the transmitting end in the embodiment related to the method 200. Alternatively, the memory 430 may include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor 410 may be configured to execute the instructions stored in the memory, so that the apparatus 400 performs the steps and/or processes of the above-described embodiments related to the method 200 corresponding to the transmitting end.
It should be understood that the transceivers described above may include both transmitters and receivers. The transceiver may further include an antenna, and the number of antennas may be one or more. The memory may be a separate device or may be integrated into the processor. The above-mentioned devices or parts of the devices may be implemented by being integrated into a chip, such as a baseband chip.
It should be understood that, in the embodiment of the present application, the processor 420 may be a Central Processing Unit (CPU), and the processor may also be other general processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The present application further provides a chip, where instructions are stored in the chip, and when the instructions are executed on the chip, the chip is enabled to execute the steps and/or the flow of the method in the embodiment shown in fig. 6.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (20)

1. A method for processing data, wherein the method is applied to a transmitting end, and the method comprises:
mapping the modulation symbols onto at least one transmission layer;
determining a first target preprocessing matrix in a preprocessing matrix set, wherein any two preprocessing matrices in the preprocessing matrix set are different;
preprocessing the modulation symbol on the first transmission layer in the at least one transmission layer by using the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, wherein the preprocessing specifically comprises: y is W X, X represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix;
and mapping the preprocessed modulation symbols on the first transmission layer on transmission resources to send to a receiving end.
2. The method according to claim 1, wherein said set of pre-processing matrices comprises at least one sparse matrix, each column of said sparse matrix comprising at least one zero element.
3. The method according to claim 1 or 2, wherein the first target pre-processing matrix is orthogonal to a first pre-processing matrix of the set of pre-processing matrices.
4. The method according to claim 1 or 2, wherein the mapping the modulation symbols on the preprocessed first transport layer on the transmission resources for transmission to a receiving end comprises:
carrying out precoding processing on the preprocessed modulation symbols on the first transmission layer to obtain precoded symbols;
and mapping the pre-coded symbols on the transmission resources and sending the pre-coded symbols to the receiving end.
5. The method according to claim 1 or 2, wherein the pre-processing the modulation symbols on the first transmission layer of the at least one transmission layer by using the first target pre-processing matrix to obtain the pre-processed modulation symbols on the first transmission layer comprises:
carrying out block processing on the modulation symbols on the first transmission layer to obtain a plurality of modulation symbols;
and respectively preprocessing the plurality of modulation symbols by using the first target preprocessing matrix to obtain the preprocessed modulation symbols on the first transmission layer.
6. The method according to claim 1 or 2, wherein the at least one transport layer is in particular a plurality of transport layers, and correspondingly the method further comprises:
utilizing a second target preprocessing matrix in the preprocessing matrix set to perform preprocessing operation on the modulation symbol on a second transmission layer in the at least one transmission layer to obtain a preprocessed modulation symbol on the second transmission layer;
correspondingly, the mapping the preprocessed modulation symbols on the first transmission layer on the transmission resources to send to the receiving end includes:
mapping the modulation symbol on the preprocessed first transmission layer and the modulation symbol on the preprocessed second transmission layer on the transmission resource to be sent to the receiving end;
wherein the first target pre-processing matrix is the same as or different from the second target pre-processing matrix.
7. The method according to claim 1 or 2, characterized in that the method further comprises:
before the preprocessed modulation symbols on the first transmission layer are mapped on transmission resources and sent to a receiving end, discrete Fourier transform is carried out on the preprocessed modulation symbols on the first transmission layer to obtain a transformed modulation symbol sequence.
8. The method according to claim 1 or 2, wherein the transmitting end is a terminal device, and before determining the first target pre-processing matrix in the set of pre-processing matrices, the method further comprises:
receiving indication information sent by a network device, wherein the indication information is used for indicating the first target preprocessing matrix in the preprocessing set;
wherein the determining a first target pre-processing matrix in the set of pre-processing matrices includes:
and determining a first target preprocessing matrix from the preprocessing matrix set according to the indication information.
9. The method according to claim 8, wherein the indication information is used to indicate an index of the first target pre-processing matrix in the set of pre-processing matrices, or wherein the indication information is used to indicate a subset of pre-processing matrices in the set of pre-processing matrices and an index of the first target pre-processing matrix in the subset of pre-processing matrices.
10. The method of claim 8, wherein the indication information indicates a modulation mode and an index of a first target pre-processing matrix, and wherein the determining the first target pre-processing matrix from the set of pre-processing matrices according to the indication information comprises: determining the preprocessing matrix indicated by the index in the preprocessing matrix set corresponding to the modulation mode as the target preprocessing matrix; or
The indicating information indicates a waveform and an index of a first target preprocessing matrix, and accordingly, the determining the first target preprocessing matrix from the set of preprocessing matrices according to the indicating information includes: determining a preprocessing matrix indicated by the index in a preprocessing matrix set corresponding to the waveform as the target preprocessing matrix; alternatively, the first and second electrodes may be,
the indication information indicates a modulation mode, a waveform and an index of a first target pre-processing matrix, and accordingly, the determining the first target pre-processing matrix from the set of pre-processing matrices according to the indication information includes: and determining the preprocessing matrix indicated by the index in the preprocessing matrix set corresponding to the combination of the waveform and the modulation mode as the target preprocessing matrix.
11. An apparatus for processing data, the apparatus comprising:
a processing unit for mapping the modulation symbols onto at least one transmission layer;
the processing unit is further configured to determine a first target preprocessing matrix in a set of preprocessing matrices, where any two preprocessing matrices in the set of preprocessing matrices are different;
the processing unit is further configured to perform preprocessing on the modulation symbol on the first transmission layer in the at least one transmission layer through the first target preprocessing matrix to obtain a preprocessed modulation symbol on the first transmission layer, where the preprocessing specifically includes: y is W X, X represents the input of the preprocessing, Y represents the output of the preprocessing, and W is a preprocessing matrix;
and the transceiving unit is used for mapping the preprocessed modulation symbols on the first transmission layer on transmission resources and sending the modulation symbols to a receiving end.
12. The apparatus according to claim 11, wherein the set of pre-processing matrices comprises at least one sparse matrix, each column of the sparse matrix comprising at least one zero element.
13. The apparatus according to claim 11 or 12, wherein the first target pre-processing matrix is orthogonal to a first pre-processing matrix of the set of pre-processing matrices.
14. The apparatus according to claim 11 or 12, characterized in that the apparatus further comprises a transmitting unit,
the processing unit is further to: carrying out precoding processing on the preprocessed modulation symbols on the first transmission layer to obtain precoded symbols;
the sending unit is specifically configured to: and mapping the pre-coded symbols on the transmission resources and sending the pre-coded symbols to the receiving end.
15. The apparatus according to claim 11 or 12, wherein the processing unit is specifically configured to:
carrying out block processing on the modulation symbols on the first transmission layer to obtain a plurality of modulation symbols;
and respectively preprocessing the plurality of modulation symbols by using the first target preprocessing matrix to obtain the preprocessed modulation symbols on the first transmission layer.
16. The apparatus according to claim 11 or 12, wherein the at least one transport layer is specifically a plurality of transport layers, and accordingly the processing unit is further configured to:
utilizing a second target preprocessing matrix in the preprocessing matrix set to perform preprocessing operation on the modulation symbol on a second transmission layer in the at least one transmission layer to obtain a preprocessed modulation symbol on the second transmission layer;
the transceiver unit is further configured to:
mapping the modulation symbol on the preprocessed first transmission layer and the modulation symbol on the preprocessed second transmission layer on the transmission resource to be sent to the receiving end;
wherein the first target pre-processing matrix is the same as or different from the second target pre-processing matrix.
17. The apparatus according to claim 11 or 12, wherein the processing unit is further configured to:
before the preprocessed modulation symbols on the first transmission layer are mapped on transmission resources and sent to a receiving end, discrete Fourier transform is carried out on the preprocessed modulation symbols on the first transmission layer to obtain a transformed modulation symbol sequence.
18. The apparatus according to claim 11 or 12, wherein the apparatus is a terminal device, and the transceiver unit is further configured to:
before a first target preprocessing matrix is determined in a preprocessing matrix set, receiving indication information sent by a network device, wherein the indication information is used for indicating the first target preprocessing matrix in the preprocessing set;
the processing unit is specifically configured to: and determining a first target preprocessing matrix from the preprocessing matrix set according to the indication information.
19. The apparatus of claim 18, wherein the indication information indicates an index of the first target pre-processing matrix in the set of pre-processing matrices, or wherein the indication information indicates a subset of pre-processing matrices in the set of pre-processing matrices and an index of the first target pre-processing matrix in the subset of pre-processing matrices.
20. The apparatus according to claim 18, wherein the indication information indicates a modulation mode and an index of a first target pre-processing matrix, and accordingly the processing unit is further configured to: determining the preprocessing matrix indicated by the index in the preprocessing matrix set corresponding to the modulation mode as the target preprocessing matrix; or
The indication information indicates a waveform and an index of the first target preprocessing matrix, and accordingly, the processing unit is further configured to: determining a preprocessing matrix indicated by the index in a preprocessing matrix set corresponding to the waveform as the target preprocessing matrix; alternatively, the first and second electrodes may be,
the indication information indicates a modulation mode, a waveform, and an index of the first target pre-processing matrix, and accordingly, the processing unit is further configured to: and determining the preprocessing matrix indicated by the index in the preprocessing matrix set corresponding to the combination of the waveform and the modulation mode as the target preprocessing matrix.
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