WO2020107188A1

WO2020107188A1 - Data processing method, device and storage medium

Info

Publication number: WO2020107188A1
Application number: PCT/CN2018/117546
Authority: WO
Inventors: 陈文洪; 方昀; 曾小娟; 曾裕
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2020-06-04
Also published as: CN111869139B; CN111869139A

Abstract

Provided are a data processing method, a terminal device, a network device and a storage medium. The method comprises: the terminal device obtains precoding indication information of at least one data stream, the precoding instruction information is used to indicate whether a disturbance is added to the at least one data stream or whether modulo operation is performed (S201).

Description

Data processing method, equipment and storage medium

Technical field

The present invention relates to the field of wireless communication technology, and in particular, to a data processing method, device, and storage medium.

Background technique

In the related art, in order to reduce Inter-Channel Interference (ICI) caused by Multiple Input Multiple Output (MIMO) technology, network equipment adopts precoding technology to eliminate ICI in advance. The widely used linear precoding and non-linear precoding combined precoding scheme: the transmission symbol is divided into two parts, part of the transmission symbol is linear precoding, and the other part of the transmission symbol is nonlinear precoding. However, there is no effective solution to how the terminal device detects the transmitted symbols using linear precoding and non-linear precoding combined precoding to improve the performance of the combined precoding.

Summary of the invention

To solve the above technical problems, embodiments of the present invention provide a data processing method, device, and storage medium. The terminal device can determine whether to perform a modulo operation on at least one received data stream, thereby improving the performance of joint precoding.

In a first aspect, a data processing method provided by an embodiment of the present invention includes: a terminal device acquiring precoding instruction information of at least one data stream, where the precoding instruction information is used to indicate whether the at least one data stream adds disturbance or whether to perform Modulus operation.

In a second aspect, a data processing method provided by an embodiment of the present invention includes: a network device sends precoding instruction information of at least one data stream to a terminal device, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance Or whether to take the mold operation.

In a third aspect, a terminal device provided by an embodiment of the present invention includes:

The first processing unit is configured to obtain precoding instruction information of at least one data stream, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.

In a fourth aspect, a network device provided by an embodiment of the present invention includes: a sending unit configured to send precoding indication information of at least one data stream to a terminal device, where the precoding indication information is used to indicate whether the at least one data stream Add disturbance or whether to perform modulo operation.

According to a fifth aspect, this embodiment provides a terminal device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the terminal device when the computer program is run Perform the steps of the data processing method.

In a sixth aspect, this embodiment provides a network device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute the network device when the computer program is run Perform the steps of the data processing method.

In a seventh aspect, this embodiment provides a storage medium that stores an executable program, and when the executable program is executed by a processor, the data processing method executed by the terminal device described above is implemented.

In an eighth aspect, this embodiment provides a storage medium that stores an executable program, and when the executable program is executed by a processor, the data processing method executed by the network device described above is implemented.

In the data processing method provided by the embodiment of the present invention, the terminal device obtains precoding indication information of at least one data stream, where the precoding indication information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation. The terminal device obtains the precoding instruction information of one less data stream, so that the terminal device only modulates the data stream added with disturbance or the modulo operation, which effectively improves the performance of linear precoding and eliminates the The loss of linear precoding performance caused by the modulo operation further improves the performance of joint precoding.

BRIEF DESCRIPTION

FIG. 1 is a schematic diagram of a composition structure of a communication system according to an embodiment of the present invention;

2 is a schematic diagram of an optional processing flow of a data processing method applied to a terminal device according to an embodiment of the present invention;

3 is a schematic diagram of an optional processing flow of a data processing method applied to a network device according to an embodiment of the present invention;

4 is a schematic structural diagram of the composition of a terminal device according to an embodiment of the present invention;

5 is a schematic structural diagram of a network device provided by an embodiment of the present invention;

6 is a schematic diagram of a hardware composition structure of an electronic device provided by an embodiment of the present invention.

detailed description

In order to understand the features and technical contents of the embodiments of the present invention in more detail, the following describes the implementation of the embodiments of the present invention in detail with reference to the drawings. The accompanying drawings are for reference only and are not intended to limit the embodiments of the present invention.

Before describing the embodiments of the present invention in detail, the precoding technology will be briefly described.

As one of the key technologies of modern wireless communication system, MIMO technology is widely used because it can greatly improve the system capacity and spectrum efficiency of the communication system. With MIMO technology, the transmitted symbol can be transmitted from multiple transmit antennas simultaneously; thus, although it can significantly improve the spectral efficiency, ICI is also introduced. In response to this problem, ICI can be eliminated by the network device in advance. This method is called precoding technology.

The most common linear precoding algorithms are zero-forcing (ZF) precoding, minimum mean square error (MMSE) precoding, and block diagonalization (BD) precoding. Although linear precoding is simple to implement, it is difficult to obtain an ideal system gain. Therefore, in order to further improve the performance of precoding, nonlinear precoding has been successively proposed; among them, the earliest proposed is Dirty Paper Code (DPC). If the network equipment knows all the additive interference, DPC can perfectly eliminate ICI and obtain the most ideal performance gain. However, the complexity of DPC implementation is extremely high, and in the actual system, the network device simply cannot fully know all the channel information, so it is difficult to realize in practice. In order to reduce the complexity of DPC and obtain better precoding performance, Tomlinson-Harashima precoding (Tomlinson-Harashima Precoding (THP) and Vector Perturbation (VP) precoding have been proposed successively. Equivalent to THP, VP precoding superimposes the disturbance vector on the transmission signal, which can further limit the transmission power and improve the signal-to-noise ratio at the receiving end, thereby obtaining better performance gain.

However, the complexity of calculating the VP perturbation vector is very high, and with the increase of the number of transmitting antennas, the complexity will rise sharply; in order to reduce the complexity, a combined linear and nonlinear precoding scheme appears, such as ZF precoding Combining with VP precoding: Transmitting symbols are divided into two parts through appropriate selection schemes, part of the transmitted symbols are pre-coded with VP, and the remaining parts are pre-coded with ZF; the terminal device modulo all received symbols.

However, the mold taking operation will bring about problems such as forming loss, mold taking loss and power loss. The terminal equipment for sending symbols for ZF precoding does not need to perform modulo operation originally, but in the joint precoding scheme, forcibly performing modulo operation on the ZF precoded transmitted symbols will cause the ZF precoding performance to decrease, resulting in the performance of the entire system reduce. If the terminal device does not perform the modulo operation on the transmitted symbols using the ZF precoding, but only performs the modulo operation on the transmitted symbols using the VP precoding, the performance of the joint precoding will be improved to a certain extent.

Based on the above problems, the present invention provides a data processing method. The data processing method of the embodiments of the present application can be applied to various communication systems, such as: Global Mobile Communication (Global System of Mobile Communication (GSM) system, code division multiple access (GSM Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunications System (Universal Mobile Telecommunication System, UMTS), Global Interoperability for Microwave Access, WiMAX) communication system or 5G system, etc.

Exemplarily, the communication system 100 applied in the embodiment of the present application is shown in FIG. 1. The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, terminal). The network device 110 can provide communication coverage for a specific geographic area, and can communicate with terminal devices located within the coverage area. Optionally, the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or a wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, an in-vehicle device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks or network devices in future public land mobile networks (Public Land Mobile Network, PLMN), etc.

The communication system 100 also includes at least one terminal device 120 within the coverage of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Lines (DSL), digital cables, and direct cable connections ; And/or another data connection/network; and/or via wireless interfaces, such as for cellular networks, wireless local area networks (Wireless Local Area Network, WLAN), digital TV networks such as DVB-H networks, satellite networks, AM- FM broadcast transmitter; and/or another terminal device configured to receive/transmit communication signals; and/or Internet of Things (IoT) equipment. A terminal device configured to communicate through a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular phones; Personal Communication Systems (PCS) terminals that can combine cellular radiotelephones with data processing, fax, and data communication capabilities; can include radiotelephones, pagers, Internet/internal PDA with network access, web browser, notepad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palm-type receivers or others including radiotelephone transceivers Electronic device. Terminal equipment can refer to access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or User device. Access terminals can be cellular phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (Wireless Local Loop, WLL) stations, personal digital processing (Personal Digital Assistant (PDA), wireless communication Functional handheld devices, computing devices, or other processing devices connected to a wireless modem, in-vehicle devices, wearable devices, terminal devices in a 5G network, or terminal devices in a future-evolving PLMN, etc.

Optionally, terminal equipment 120 may perform terminal direct connection (Device to Device, D2D) communication.

Alternatively, the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.

FIG. 1 exemplarily shows one network device and two terminal devices. Optionally, the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This application The embodiment does not limit this.

Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.

It should be understood that the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here. The communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities, and other network entities, which are not limited in the embodiments of the present application.

An optional processing flow of a data processing method applied to a terminal device provided by an embodiment of the present invention, as shown in FIG. 2, includes the following steps:

Step S201: The terminal device obtains precoding instruction information of at least one data stream, where the precoding instruction information is used to indicate whether the at least one data stream is added with a disturbance or whether a modulo operation is performed.

In some embodiments, the terminal device obtains precoding indication information of N data streams through radio resource control (Radio Resource Control, RRC) signaling or media access control (Media Access Control, MAC) signaling, and the N The data stream includes the at least one data stream, and N is a positive integer; the terminal device determines the precoding instruction information of the at least one data stream from the precoding instruction information of the N data streams.

In specific implementation, the terminal device determining the precoding instruction information of the at least one data stream from the precoding instruction information of the N data streams includes: the terminal device is based on the at least one data stream in The index information in the N data streams, determining the precoding instruction information of the at least one data stream from the precoding instruction information of the N data streams. Wherein, the index information is indicated to the terminal device through downlink signaling; or, the index information is predetermined index information.

Alternatively, in specific implementation, the terminal device determining precoding instruction information of the at least one data stream from the precoding instruction information of the N data streams includes: the terminal device receiving the data stream sent by the network device Number information (Rank), the data number stream information is used to indicate the number of the at least one data stream; the terminal device obtains the data stream number information in the precoding indication information of the N data streams Corresponding disturbance information or modulus information. For example, when the number of data streams sent by the network device is M, M≤N, the terminal device uses the M precoding instructions in the precoding instructions of the N data streams as the current M data streams. Disturbance information or modulus information. Optionally, the M precoding instructions may be the first M precoding instructions in the precoding instructions corresponding to the N data streams, or the last M precoding instructions in the N data streams. Precoding instruction information, or any M pieces of precoding instruction information in the precoding instruction information corresponding to the N data streams.

It should be noted that the maximum value of N in the embodiment of the present invention is the maximum number of data streams supported by the terminal device.

In other embodiments, the terminal device receives the precoding indication information as the precoding indication information corresponding to the current number of data streams (Rank). For example, the network device indicates to the terminal device (Downlink Control Information, DCI) that the current number of data streams is M, and the network device sends the precoding instruction information of M data streams to the terminal device to indicate whether the M data streams add disturbance Or whether to take the mold operation.

In one embodiment, the precoding indication information indicates whether a perturbation is added to each data stream or whether a modulo operation is performed in a bitmap manner. For example, when the corresponding bit value in the bitmap is the first value, it indicates that the first data stream corresponding to the first value does not add disturbance; when the corresponding bit value in the bitmap is the second value, it indicates that the first The first data stream corresponding to the two values adds disturbance.

Or, when the corresponding bit value in the bitmap is the first value, it indicates that the second data stream corresponding to the first value is not subjected to modulo operation; when the corresponding bit value in the bitmap is the second value, it indicates the first The second data stream corresponding to the two values performs the modulo operation.

In another embodiment, the precoding instruction information instructs the first n data streams to add disturbance or perform modulo operation, or the precoding instruction information instructs the first n data streams to not add disturbance or modulo Operation, where n is a non-negative integer.

Or, the precoding instruction information indicates that the last n data streams add disturbance or modulo operation, or the precoding instruction information indicates that the next n data streams do not add disturbance or modulo operation, where n is non- Negative integer, n is less than the maximum number of data streams supported by the terminal device, or n is less than the number of data streams currently used by the terminal device.

At this time, the network device only needs to send the value of n to the terminal device; the value of n can be indicated to the terminal device through RRC signaling, MAC signaling, or DCI; and the signaling overhead of carrying the value of n is small.

In the embodiment of the present invention, the method further includes:

Step S202: The terminal device receives the at least one data stream according to the precoding instruction information.

In some embodiments, when the precoding indication information indicates that a disturbance is added to the third data stream in the at least one data stream, the terminal device performs a modulo operation on the data symbols in the third data stream; or,

When the precoding instruction information instructs the data symbol in the third data stream in the at least one data stream to perform a modulo operation, the terminal device performs a modulo operation on the third data stream.

For example, user i ₁ performs a modulo operation on its j ₁ data stream.

then

Is the j _1st data stream symbol received by user i ₁ ; user i ₂ performs modulo operation on its j ₂ data stream, there are

then

Is the j _2nd data symbol received by user i ₂ ;..., user in _n performs modulo operation on its j _n data stream, there are

then

It is the j _nth data symbol received by user i _n .

In the embodiment of the present invention, since the terminal device only performs the modulo operation on the data stream added with disturbance or the modulo operation, the performance of linear precoding is improved, and the linear precoding caused by the modulo operation is eliminated Performance loss.

Before performing step S202, the method further includes:

In step S201a, the terminal device normalizes the received data.

When the signal received by terminal device i is y _i , multiplied by the power normalization factor is:

Step S202a: The terminal device performs linear detection on the at least one data stream.

For terminal device i, if the equalization matrix for linear detection is G _i , the signal after linear detection is:

Assume

In order to perform linear detection, the j-th received symbol of user i, the symbol means to take the vector

The jth symbol. For data that does not require modulo operation, the signal after linear detection

It is the jth data symbol received by the terminal device i.

The optional processing flow of the data processing method applied to the network device provided by the embodiment of the present invention, as shown in FIG. 3, includes the following steps:

Step S301: The network device sends precoding instruction information of at least one data stream to the terminal device, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.

In the embodiment of the present invention, the description of the precoding instruction information and the description of the manner of sending the precoding instruction information are the same as those in the foregoing embodiment, and are not repeated here.

Before performing step S301, the method further includes the steps of:

Step S300, the network device determines a data flow that needs to be added with disturbance based on the downlink channel information, or determines a data flow that needs to perform a modulo operation.

In some embodiments, the downlink channel information is: a channel matrix of at least one MIMO channel split based on the channel information of the terminal device. Correspondingly, the network device determines the channel capacity corresponding to the channel matrix of the MIMO channel based on the split channel matrix of the MIMO channel; and determines the data stream to which the disturbance needs to be added based on the channel capacity.

For example, there are K terminal devices, and N streams of data are transmitted in total. First, the channels of the K terminal devices are split into channels where the transmitting end is N _t transmitting antennas (where N _t is the number of base station transmitting antennas) and the receiving end is one receiving antenna. If the terminal device N _i i needs to receive the streaming data, the terminal device channel i is split into the MIMO channel matrix N _i th of N _t × 1.

Here, the data stream to which the disturbance needs to be added is determined based on the channel capacity, so that the network device only needs to send the precoding instruction information to the terminal device once within the coherent bandwidth, which can effectively reduce the system overhead.

In other embodiments, the downlink channel information includes at least one of the following: a channel correlation matrix determined by the network device according to channel reciprocity, a channel correlation matrix reported by the terminal device, and interference reported by the terminal device Power information.

In the embodiment of the present invention, the notification of the modulo information or the disturbance information is directed to the data stream, not to the data symbol, so that the required downlink signaling overhead is small.

It should be noted that, in the embodiment of the present invention, since the data stream selected for disturbance is mainly determined based on the channel information of the terminal device, which data stream is selected to add disturbance or perform modulo operation within a certain period of time (this time can last for the channel-related bandwidth Time) is constant. Therefore, the network device only needs to feed forward the precoding instruction information to the terminal device once within Δτ (Δτ may be the duration of the relevant bandwidth).

Step S302: The network device loads a disturbance vector on the data stream to which disturbance needs to be added.

In some embodiments, in some embodiments, the downlink channel information is: when the channel matrix of at least one MIMO channel split based on the channel information of the terminal device, the network device determines the maximum channel capacity value The data stream corresponding to the n channel capacities is the data stream to be added with disturbance.

For example, calculating the channel capacity of the j-th MIMO channel split by the terminal device i

for:

Among them, SNR is the signal-to-noise ratio of the receiving end,

The channel matrix of the j-th MIMO channel split from the channel information of the terminal device i, j=1, 2, ..., N _i .

will

The values are sorted from largest to smallest, and then the top n larger ones are selected

Where n is the number of data streams that need to be superimposed and is an empirical value. Suppose the final selection result is

Finally, it can be determined to add a disturbance to the j _1st data stream of the terminal device i ₁ ; to add a disturbance to the j ₂ data stream of the terminal device i ₂ ; ..., and to the j _nth data of the terminal device i _n Disturbance is added to the data stream, and no disturbance is added to other data streams.

In other embodiments, when the downlink channel information includes the channel correlation matrix determined by the network device according to channel reciprocity, the channel correlation matrix reported by the terminal device, and the interference power information reported by the terminal device. In at least one item, the network device determines a linear precoding vector based on the downlink channel information to obtain a first precoding matrix, and determines a nonlinear precoding vector based on the first precoding matrix; based on the nonlinear precoding vector Encode the vector to determine the data stream that needs to be modulo processed.

In the specific implementation, it includes the following steps:

Step 1: The network device obtains a linear precoding vector.

In some embodiments, if the network device only obtains the correlation matrix R _i (i=1, 2, ..., N) of each data stream, the current SNR value of the user is not obtained

Calculate the linear precoding vector:

The eig(·) operation refers to obtaining the feature vector corresponding to the largest eigenvalue of the matrix.

In other embodiments, if the network device not only obtains the correlation matrix R _i (i=1, 2, ..., N) of each data stream, but also obtains the SNR value of the current terminal device

Calculate the linear precoding vector:

Among them, eig(·) refers to obtaining the feature vector corresponding to the largest eigenvalue of the matrix

Is the noise power, I is the identity matrix,

Correlation matrix of interference channel matrix generated for other users;

among them,

Construct a new matrix V of the precoding vectors of each data stream of the terminal device in order:

V = [v ₁ , v ₂ ,..., v _N ] (6)

Step 2: The network device obtains a non-linear precoding vector.

In specific implementation, the network device first obtains the matrix W:

W = (V ^-1 ) ^H (7)

The network device performs QR decomposition on the W matrix:

W = QR (8)

The diagonal elements of the R matrix are taken out to obtain the equilibrium matrix G.

among them,

Then, the network device obtains the matrices B and F.

Among them, B = R ^H G; F = Q (10)

Due to the triangular structure of the feedback matrix B, the symbols x _k (k=1,...,N) transmitted on the antenna k will pass through the data symbols

And produced.

Step 3, the network device determines x _k n data streams by not generating modulo mode, additional (Nn) of data streams generated by modulo mode x _k, where n is equal to 0, the integer N less. Among them, the n data streams may be the first n data streams.

In the embodiment of the present invention, the data flow in the non-modulo mode is obtained by the following formula:

b _k,l is the element of the kth row and the lth column of the matrix B.

Among them, the data flow of the modulo mode is obtained by the following formula:

MOD() is modulus operation, modulus constant is

M is the modulation order.

Optionally, (Nn) data streams of x _k modulo can be calculated:

d _k =x _k -s _k ,k=n+1,n+2,...,N (13)

Here, d _k has two values, which are 0 and non-zero.

Step 4. The network device pre-codes the transmitted signal x=[x ₁ , x ₂ ,..., x _N ] ^T.

Optionally, pre-code the transmitted signal by the following formula:

Step 5. The network device normalizes the transmission power.

Optionally, the network device normalizes the transmission power by the following formula:

among them,

Step S303: The network device performs precoding processing on the data stream based on the downlink channel information, and the precoding processing includes linear precoding processing and nonlinear precoding processing.

In some embodiments, the network device precoding the data stream based on the downlink channel information includes the following steps:

Step a. Find the precoding matrix based on the ZF criterion.

among them

The pseudo inverse matrix of the entire channel large matrix H arranged for all users' channels. Here, the channel corresponding to the data stream that does not require superimposed disturbance

Arrange in the first Nn rows, and arrange the channels corresponding to the data streams that need to be superimposed perturbation in the last n rows. Suppose s is the data symbol vector in the data stream, which is the transmission vector, and the reconstructed transmission vector s is

Send vector after reconstruction

Place the data symbols that do not require superimposed perturbation in the first Nn lines, and the data symbols that require superimposed perturbation in the last n lines.

Step b. Search for the disturbance vector.

The disturbance vector is expressed by the following formula:

In specific implementation, the disturbance vector

The solution can be obtained by traditional ball decoding method.

Step c, yes

Rearrange in order, and load the above disturbance results on the symbols of the desired disturbance.

among them

Is the channel matrix rearranged according to the user; s is the data symbol vector after the user is sequentially arranged;

In order to add the perturbation vectors after the user has arranged the sequence in sequence, you can

The elements in are sorted accordingly;

Disturbed transmission symbols are added after being arranged in order of users.

In step d, the transmission power is normalized.

among them,

It is a transmission symbol arranged in order and added with disturbance and normalization.

Step S304: The network device sends the pre-encoded data stream to the terminal device.

The data processing method provided by the embodiments of the present invention will be described in detail below through the first embodiment and the second embodiment.

First embodiment

Taking the number of transmitting antennas of the network device as N _t =8, each terminal device is configured with 4 receiving antennas, 2 terminal devices, using 4QAM modulation, and selecting n=4 data streams to superimpose disturbance as an example.

Represents the data symbols in the 8 data streams arranged smoothly, the first 4 symbols represent 1, 2, 3, 4 data symbols of user 1, and the last 4 symbols represent 1, 2, 3 of terminal device 2, respectively , 4 data symbols.

In step S401, the network device determines that the perturbed data stream needs to be superimposed.

In a specific implementation, the network device splits the channels of the terminal device 1 and the terminal device 2 into four 8-transmit and 1-receive MIMO channel matrices. Use formula

Calculate the channel capacity of the 1, 2, 3, and 4 MIMO channels into which the channel of terminal device 1 is split, respectively:

At the same time, the channel capacity of the 1, 2, 3, and 4 MIMO channels into which the channel of the terminal device 2 is split is calculated as:

Then convert these

The values are sorted from largest to smallest, and then the first 4 larger ones are selected

Suppose the final result is

Step S402, the network device finds a precoding matrix based on the ZF criterion

In the embodiment of the present invention, H is rearranged, and the channels corresponding to the data streams that do not need to be superimposed perturbation are arranged in the first 4 lines, and the channels corresponding to the data streams that need to be superimposed perturbation are arranged in the last 4 lines. According to the final selection result obtained in step S401, obtain

Step S403, the network device searches for the disturbance vector.

Suppose the perturbation vector obtained by ball decoding

Step S404, the network device determines to add the transmitted symbol after the disturbance.

In the specific implementation, first, the network equipment

After rearranging in order, you get:

The network equipment rearranges H to obtain

Then, the network device will

Each element in corresponds to the final perturbation vector

In, get

Therefore, according to the terminal equipment as the dimension, the network device adds the disturbance transmission symbol as follows:

Step S405, the network device normalizes the transmission power.

In the embodiment of the present invention, after the network device normalizes the transmission power, it obtains:

among them,

Step S406, the network device sends precoding instruction information to the terminal device.

In the embodiment of the present invention, the network device according to the final disturbance vector

Inform terminal device 1 to perform modulo operation on its third data stream after linear detection, and only perform linear detection on the remaining data streams; notify terminal device 2 to perform linear detection on its 1, 2, and 4 data streams Modulus operation, only linear detection is performed on the remaining data streams.

In specific implementation, the network device may send the precoding instruction information to the terminal device, at least in any of the following ways:

Method 1: The network device instructs each terminal device separately.

In some embodiments, the RRC signaling sent by the network device to terminal device 1 is 0010, the DCI indication sent by the network device to terminal device 1 is rank 4; the RRC signaling sent by network device to terminal device 1 is 1101, the network The DCI indication rank sent by the device to the terminal device 2 is 2.

In other embodiments, the DCI sent by the network device to terminal device 1 is 0010, and the DCI indication rank is 4, the DCI sent by the network device to terminal device 11 is 11, and the DCI indication rank is 2.

Method 2: The network device broadcasts the data flow disturbance information to the terminal device 1 and the terminal device 2.

Optionally, the RRC signaling sent by the network device to terminal device 1 and terminal device 2 is 00101101, DCI indicates that the rank of terminal device 1 is 4, and DCI indicates that the rank of terminal device 2 is 2.

Step S407, the terminal device receives the precoding instruction information sent by the network device.

In step S408, the terminal device multiplies the received signal by the corresponding normalization factor.

For example, the signal received by terminal device i is y _i , and multiplied by the power normalization factor is:

In step S409, the terminal device performs ZF and/or MMSE linear detection.

For the terminal device 1, if the equalization matrix of linear detection is G ₁ , the data after linear detection is:

For the terminal device 2, if the equalization matrix of linear detection is G ₂ , the data after linear detection is:

Assume

In order to perform linear detection, the jth received symbol of the terminal equipment, the symbol means to take the vector

The jth symbol.

Step S410: The terminal device obtains the data stream disturbance according to the received precoding instruction information, and performs corresponding modulo and non-modulo operations on the data stream according to the data stream disturbance.

In some embodiments, with respect to the manner of sending the precoding indication information performed in manner 1 in step S406 above, the terminal device 1 takes the first 4 bits of 0010 according to the received RRC signaling: 0010, DCI: 4, namely 0010 As the data flow disturbance information of the terminal device 1. The terminal device 2 takes the first 2 bits of 1101, that is, 11 as the data flow disturbance information of the terminal device 2 according to the received RRC signaling: 1101, DCI: 2.

The terminal device 1 uses 0010 in the received DCI as the data flow disturbance information of the terminal device 1. The terminal device 2 uses 11 in the received DCI as the data flow disturbance information of the terminal device 2.

In some other embodiments, with respect to the manner of sending the precoding indication information performed by way 1 in step S406 above, terminal device 1 and terminal device 2 transmit RRC signaling: 00101101, and the data stream of terminal device 1 is transmitted on the network device The indexes in all data streams of are 1, 2, 3, and 4; therefore, the terminal device 1 will use 0010 in RRC signaling: 00101101 as the data stream disturbance information of the terminal device 1. The terminal device 2 has indexes 5, 6, 7, 8 according to the data stream of the terminal device 2 in all data streams transmitted by the network device; therefore, the terminal device 2 will use RRC signaling: 1101 in 00101101 as the terminal device 2’s Data flow disturbance information.

In step S411, the terminal device performs corresponding modulo and non-modulo operations on the data stream according to the acquired data stream disturbance information.

In the embodiment of the present invention, the terminal device 1 performs modulo operation on the third data stream according to its corresponding precoding instruction information 0010, and does not perform modulo operation on the remaining data streams.

get:

The terminal device 2 performs modulo operations on the first, second, and fourth data streams according to its corresponding precoding instruction information 1101, and does not perform modulo operations on the third data stream.

get:

Second embodiment

Take the number of transmitting antennas of a network device as 4 and the number of terminal devices as 2, each terminal device is configured with 2 receiving antennas, and QPSK modulation is used as an example.

S=[s ₁ , s ₂ , s ₃ , s ₄ ] ^T represents the 4 transmitted symbols after modulation, the first 2 symbols belong to the terminal device 1, and the last 2 symbols belong to the user 2. Data streams 1 and 2 are the first stream data and second stream data of the terminal device 1, respectively, and data streams 3 and 4 are the first stream data and second stream data of the terminal device 2, respectively.

Step S501: The network device obtains the sub-channel correlation matrix R _i (i=1, 2, ..., 4) of each data stream of each terminal device and the signal-to-noise ratio of each data stream

In some embodiments, the network device obtains the channel fading that the downlink transmission signal will experience according to the received SRS uplink reference signal, and calculates the sub-channel correlation matrix R _i (i=1, 2, ..., 4) of each data stream .

In other embodiments, each terminal device directly feeds its own sub-channel correlation matrix R _i (i=1, 2,..., 4) to the network device, that is, terminal device 1 feeds back R ₁ and R ₂ , and terminal device 2 feeds back R ₃ and R ₄ .

Optionally, each terminal device feeds back the signal-to-noise ratio of its own sub-channel to the network device

Step S502, the network device calculates the precoding vector:

In some embodiments, if the network device does not obtain the SNR value of the terminal device 1

Calculate the precoding vector according to the following formula:

Among them, eig(·) refers to obtaining the eigenvector corresponding to the largest eigenvalue of the matrix.

In other embodiments, if the network device has acquired the SNR value of the terminal device 1

Calculate the precoding vector according to the following formula:

Among them, eig(·) refers to obtaining the eigenvector corresponding to the largest eigenvalue of the matrix,

Is the noise power, I is the identity matrix,

The correlation matrix of the interference channel matrix generated by data streams 2, 3, 4 is calculated according to the following formula

Based on the same method, v ₂ , v ₃ and v ₄ can be calculated.

In step S503, the network device constructs a new matrix V of the precoding vectors of each data stream of the terminal device in order:

V = [v ₁ , v ₂ , v ₃ , v ₄ ]

In step S504, the network device obtains the matrix W.

Optionally, the network device obtains the matrix W=(V ^-1 ) ^H by the following formula

In step S505, the network device performs QR decomposition on the matrix W.

Optionally, the network device decomposes the matrix W by the following formula: W=QR

In step S506, the network device extracts the diagonal elements of the R matrix to obtain an equalization matrix G.

In the embodiment of the present invention, the obtained equalization matrix G is:

In step S507, the network device obtains the matrices B and F.

In the embodiment of the present invention, the obtained matrixes B and F: B=R ^H G; F=Q

Here, since the feedback matrix B has a triangular structure, the symbol x _k (k=1, 2, ..., 4) transmitted on the antenna k passes through the data symbol

And produced.

In the embodiment of the present invention, there are at least the following three ways to generate transmission symbols:

Method 1: Let x _k (k=1, 2, ..., 4) generate transmission symbols by way of mode 1, that is, without modulo mode:

x ₁ = s ₁

Method 2: Let x _k (k=1, 2, ..., 4) generate transmission symbols by means of mode 2 that is modulo mode:

x ₁ = MOD(s ₁ )

The modulus constant is τ=4.

Embodiment 3: In an example n = 2, so that the first two symbols by way of 1 x _k modulo mode i.e. not produce, after two symbols x _k 2 by way i.e. modulo pattern generating transmission symbols:

x ₁ = s ₁

x ₂ = s ₂ -b _2,1 x ₁

The modulus constant is τ=4.

Step S508, the network device calculates the last (4-n) symbols of x _k :

d _k =x _k -s _k ,k=n+1,n+2,...,N

In the embodiment of the present invention, d _k has two values, 0 and non-zero.

In step S509, the network device pre-codes the transmission signal x=[x ₁ , x ₂ , x ₃ , x ₄ ] ^T.

In the embodiment of the present invention, the network device pre-codes the transmitted symbol by the following formula:

Step S510, the network device normalizes the transmission power.

In the embodiment of the present invention, the network device normalizes the transmission power by the following formula:

among them

In the embodiment of the present invention, after performing step S510, the network device sends the precoding instruction information to the terminal device; the operation performed by the terminal device based on the received precoding instruction information is the same as step S407 to step S411 in the foregoing embodiment 1, and here is not Repeat again.

An embodiment of the present invention also provides a terminal device, and a schematic structural diagram of the composition of the terminal device 600, as shown in FIG. 4, includes:

The first processing unit 601 is configured to obtain precoding instruction information of at least one data stream, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.

In the embodiment of the present invention, the terminal device 600 further includes:

The first receiving unit 602 is configured to receive the at least one data stream according to the precoding instruction information.

In the embodiment of the present invention, the first processing unit 601 is configured to obtain precoding indication information of N data streams, the N data streams include the at least one data stream, and N is a positive integer; from the N The precoding instruction information of each data stream determines the precoding instruction information of the at least one data stream. Wherein, the terminal device obtains the precoding indication information of the N data streams through RRC signaling or MAC signaling.

In this embodiment of the present invention, the first processing unit 601 is configured to determine, based on the index information of the at least one data stream in the N data streams, from the precoding instruction information of the N data streams The precoding instruction information of at least one data stream. Wherein, the index information is indicated to the terminal device through downlink signaling; or, the index information is predetermined index information.

In the embodiment of the present invention, the first processing unit 601 is configured to receive data stream number information sent by a network device, where the data stream number information is used to indicate the number of the at least one data stream; in the N data In the precoding instruction information of the stream, the disturbance information or the modulo information corresponding to the data stream number information is obtained.

Here, N is the maximum number of data streams supported by the terminal device.

In the embodiment of the present invention, the precoding indication information indicates whether to add perturbation or modulo operation for each data stream through a bitmap.

When the corresponding bit value of the first data stream in the bitmap is the first value, it indicates that the first data stream does not add disturbance; when the corresponding bit value of the first data stream in the bitmap is the second value , Indicating that disturbance is added to the first data stream.

When the corresponding bit value of the second data stream in the bitmap is the first value, it indicates that the second data stream has not performed the modulo operation; the corresponding bit value of the second data stream in the bitmap is the second When it is a numerical value, the second data stream is instructed to perform a modulo operation.

Or, in the embodiment of the present invention, the precoding indication information is used to indicate n; n indicates that n data streams are added with disturbance or modulo operation, or n indicates that n data streams are not added with disturbance or modulo operation, n is a non-negative integer.

In this embodiment of the present invention, the first receiving unit 602 is configured to, when the precoding instruction information indicates that a third data stream in the at least one data stream has added a disturbance, the data in the third data stream Performing a modulo operation on the symbol; or, when the precoding instruction information instructs the data symbol in the third data stream in the at least one data stream to perform a modulo operation, performing modulo operation on the third data stream.

In this embodiment of the present invention, the first processing unit 601 is further configured to perform linear detection on the at least one data stream.

An embodiment of the present invention also provides a network device. A schematic structural diagram of the composition of the network device 800, as shown in FIG. 5, includes:

The sending unit 801 is configured to send precoding instruction information of at least one data stream to the terminal device, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.

In the embodiment of the present invention, the network device 800 further includes: a second processing unit 802 configured to determine a data flow that needs to be added with disturbance based on the downlink channel information, or determine a data flow that needs to perform a modulo operation.

The second processing unit 802 is further configured to perform precoding processing on the data stream based on downlink channel information, and the precoding processing includes linear precoding processing and nonlinear precoding processing;

The sending unit 801 is further configured to send the pre-encoded data stream to the terminal device.

In an embodiment, the downlink channel information includes: a channel matrix of at least one MIMO channel split based on the channel information of the terminal device.

Correspondingly, the second processing unit 802 is configured to determine the channel capacity corresponding to the channel matrix of the MIMO channel based on the split channel matrix of the MIMO channel;

Based on the channel capacity, the data stream to which the disturbance needs to be added is determined.

The second processing unit 802 is further configured to load a disturbance vector on the data stream that needs to be added with disturbance.

The second processing unit 802 is further configured to determine the data stream corresponding to the n channel capacities with the largest channel capacity value as the data stream to be added with disturbance.

In another embodiment, the downlink channel information includes: at least one of the following:

The channel correlation matrix determined by the network device according to channel reciprocity/the channel correlation matrix reported by the terminal device/and the interference power information reported by the terminal device.

In the embodiment of the present invention, the second processing unit 802 is configured to determine a linear precoding vector based on the downlink channel information to obtain a first precoding matrix; based on the first precoding matrix, determine a nonlinear precoding vector ; Based on the nonlinear precoding vector, determine the data stream that needs to be modulo processed.

In this embodiment of the present invention, the second processing unit 802 is configured to perform modulo processing on the data stream that requires modulo processing, and perform normalization processing on the pre-encoded data stream.

In this embodiment of the present invention, the sending unit 801 is configured to send precoding instruction information of N data streams to the terminal device, where the N data streams include the at least one data stream, and N is a positive integer. Optionally, the sending unit 801 is configured to send precoding indication information of the at least one data stream through RRC signaling or MAC signaling.

In the embodiment of the present invention, the sending unit 801 is further configured to send the index information of the N data streams to the terminal device, and the index information in the N data streams is used by the terminal device to determine the Precoding information for at least one data stream. Wherein, the index information is indicated to the terminal device through downlink signaling; or, the index information is predetermined index information; N is the maximum number of data streams supported by the terminal device.

In some embodiments, the non-linear precoding indication information indicates whether a perturbation is added or whether a modulo operation is performed for each data stream through a bitmap. When the corresponding bit value of the first data stream in the bitmap is the first value, it indicates that the first data stream does not add disturbance; when the corresponding bit value of the first data stream in the bitmap is the second value , Indicating that disturbance is added to the first data stream. When the corresponding bit value of the second data stream in the bitmap is the first value, it indicates that the second data stream has not performed the modulo operation; the corresponding bit value of the second data stream in the bitmap is the second When it is a numerical value, the second data stream is instructed to perform a modulo operation.

In some other embodiments, the precoding indication information is used to indicate n; n indicates that n data streams are added with disturbance or modulo operation, or n indicates that n data streams are not added with disturbance or modulo operation, n It is a non-negative integer.

Embodiments of the invention also provide a terminal device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute data executed by the terminal device when the computer program is run Processing method steps.

An embodiment of the present invention further provides a network device, including a processor and a memory for storing a computer program that can run on the processor, where the processor is used to execute Data processing method steps.

6 is a schematic diagram of a hardware composition structure of an electronic device (network device or terminal device) according to an embodiment of the present invention. The electronic device 700 includes: at least one processor 701, a memory 702, and at least one network interface 704. The various components in the electronic device 700 are coupled together through a bus system 705. It can be understood that the bus system 705 is used to implement connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, various buses are marked as the bus system 705 in FIG. 6.

It can be understood that the memory 702 may be a volatile memory and/or a non-volatile memory. Among them, the non-volatile memory may be ROM, programmable read-only memory (PROM, Programmable Read-Only Memory), erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), electrically erasable Programmable Read Only Memory (EEPROM, Electrically Erasable, Programmable Read-Only Memory), Ferromagnetic Random Access Memory (FRAM), Flash Memory (Flash), Magnetic Surface Memory, CD, or CD-ROM (CD -ROM, Compact, Disc, Read-Only, Memory); the magnetic surface memory can be either disk storage or tape storage. The volatile memory may be a random access memory (RAM, Random Access Memory), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM, Static Random Access Memory), synchronous static random access memory (SSRAM, Synchronous Static Random Access Memory), dynamic random access Memory (DRAM, Dynamic Random Access), synchronous dynamic random access memory (SDRAM, Synchronous Dynamic Random Access Memory), double data rate synchronous dynamic random access memory (DDRSDRAM, Double Data Rate, Synchronous Dynamic Random Access Random Access Memory), enhanced Type synchronous dynamic random access memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), synchronous connection dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), direct memory bus random access memory (DRRAM, Direct Rambus Random Access Random Access Memory ). The memory 702 described in this embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

The memory 702 in the embodiment of the present invention is used to store various types of data to support the operation of the electronic device 700. Examples of these data include: any computer program for operating on the electronic device 700, such as an application program 7022. The program for implementing the method of the embodiment of the present invention may be included in the application program 7022.

The method disclosed in the foregoing embodiment of the present invention may be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 701 or an instruction in the form of software. The foregoing processor 701 may be a general-purpose processor, a digital signal processor (DSP, Digital Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and the like. The processor 701 may implement or execute the disclosed methods, steps, and logical block diagrams in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present invention may be directly implemented and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium. The storage medium is located in the memory 702. The processor 701 reads the information in the memory 702 and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the electronic device 700 may be one or more application specific integrated circuits (ASIC, Application Integrated Circuit), DSP, programmable logic device (PLD, Programmable Logic Device), complex programmable logic device (CPLD , Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, MPU, or other electronic components to implement the aforementioned method.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs.

Optionally, the computer-readable storage medium may be applied to the network device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiments of the present application; or the computer-readable The storage medium may be applied to the terminal device in the embodiments of the present application, and the computer program causes the computer to execute the corresponding process implemented by the terminal device in each method of the embodiments of the present application; for the sake of brevity, details are not described here.

The present invention is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and/or block in the flowchart and/or block diagram and a combination of the flow and/or block in the flowchart and/or block diagram may be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, special-purpose computer, embedded processing machine, or other programmable data processing device to produce a machine that enables the generation of instructions executed by the processor of the computer or other programmable data processing device An apparatus for realizing the functions specified in one block or multiple blocks of one flow or multiple flows of a flowchart and/or one block or multiple blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, the instructions The device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams. These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to produce computer-implemented processing, which is executed on the computer or other programmable device The instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in Within the protection scope of the present invention.

Claims

A data processing method, the method includes:

The terminal device acquires precoding instruction information of at least one data stream, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.
The method of claim 1, wherein the method further comprises:

The terminal device receives the at least one data stream according to the precoding instruction information.
The method according to claim 1 or 2, wherein the terminal device acquiring precoding indication information of at least one data stream includes:

The terminal device obtains precoding indication information of N data streams, where the N data streams include the at least one data stream, and N is a positive integer;

The terminal device determines precoding instruction information of the at least one data stream from precoding instruction information of the N data streams.
The method according to claim 3, wherein the terminal device obtains precoding indication information of the N data streams through radio resource control RRC signaling or media access control MAC signaling.
The method according to claim 3, wherein the terminal device determining precoding instruction information of the at least one data stream from precoding instruction information of the N data streams includes:

The terminal device determines the precoding indication information of the at least one data stream from the precoding indication information of the N data streams based on the index information of the at least one data stream in the N data streams.
The method according to claim 5, wherein the index information is indicated to the terminal device through downlink signaling; or,

The index information is predetermined index information.
The method according to claim 3, wherein the terminal device determining precoding instruction information of the at least one data stream from precoding instruction information of the N data streams includes:

The terminal device receives data stream number information sent by a network device, where the data stream number information is used to indicate the number of the at least one data stream;

The terminal device obtains disturbance information or modulus information corresponding to the data stream number information in the precoding instruction information of the N data streams.
The method according to any one of claims 3 to 7, wherein N is the maximum number of data streams supported by the terminal device.
The method according to any one of claims 1 to 8, wherein the precoding indication information indicates whether a perturbation is added to each data stream or whether a modulo operation is performed in a bitmap bitmap manner.
The method according to claim 9, wherein, when the corresponding bit value of the first data stream in the bitmap is the first value, it indicates that the first data stream has no disturbance added;

When the corresponding bit value of the first data stream in the bitmap is a second value, it indicates that the first data stream has added a disturbance.
The method according to claim 9, wherein when the corresponding bit value of the second data stream in the bitmap is the first value, it indicates that the second data stream does not perform the modulo operation;

When the corresponding bit value in the bitmap of the second data stream is a second value, the second data stream is instructed to perform a modulo operation.
The method according to any one of claims 1 to 8, wherein the precoding indication information is used to indicate n;

n means that n data streams add disturbance or modulo operation, or n means that n data streams do not add disturbance or modulo operation, and n is a non-negative integer.
The method according to claim 2, wherein the terminal device receiving the at least one data stream according to the precoding indication information includes:

When the precoding indication information indicates that a disturbance is added to the third data stream in the at least one data stream, the terminal device performs a modulo operation on the data symbols in the third data stream; or,

When the precoding instruction information instructs the data symbol in the third data stream in the at least one data stream to perform a modulo operation, the terminal device performs a modulo operation on the third data stream.
The method according to any one of claims 1 to 13, wherein the method further comprises:

The terminal device performs linear detection on the at least one data stream.
A data processing method, the method includes:

The network device sends precoding instruction information of at least one data stream to the terminal device, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.
The method of claim 15, wherein the method further comprises:

The network device determines the data flow to which the disturbance needs to be added based on the downlink channel information, or determines the data flow to perform the modulo operation.
The method of claim 16, wherein the method further comprises:

The network device performs precoding processing on the data stream based on the downlink channel information, and the precoding processing includes linear precoding processing and nonlinear precoding processing;

The network device sends the pre-encoded data stream to the terminal device.
The method according to claim 17, wherein the downlink channel information includes:

A channel matrix of at least one multiple input multiple output MIMO channel split based on the channel information of the terminal device.
The method according to claim 18, wherein the network device determining the data flow to which the disturbance needs to be added based on the downlink channel information, or determining the data flow to perform the modulo operation includes:

The network device determines the channel capacity corresponding to the channel matrix of the MIMO channel based on the channel matrix of the split MIMO channel;

Based on the channel capacity, the data stream to which the disturbance needs to be added is determined.
The method according to claim 19, wherein the network device precoding the data stream based on the downlink channel information includes:

The network device loads a disturbance vector on the data stream to which a disturbance needs to be added.
The method according to claim 19 or 20, wherein the determining the data stream to be added with disturbance based on the channel capacity includes:

The network device determines that the data stream corresponding to the n channel capacities with the largest channel capacity value is the data stream to be added with disturbance.
The method according to claim 17, wherein the downlink channel information includes at least one of the following:

A channel correlation matrix determined by the network device according to channel reciprocity;

A channel correlation matrix reported by the terminal device;

The interference power information reported by the terminal device.
The method according to claim 22, wherein the network device determining the data flow to which the disturbance needs to be added based on the downlink channel information, or determining the data flow to perform the modulo operation includes:

The network device determines a linear precoding vector based on the downlink channel information to obtain a first precoding matrix;

The network device determines a non-linear precoding vector based on the first precoding matrix;

Based on the non-linear precoding vector, the network device determines a data stream that needs to be modulo processed.
The method according to claim 22 or 23, wherein the network device precoding the data stream based on the downlink channel information includes:

The network device performs modulo processing on the data stream that needs to be modulo processed.
The method according to claims 16 to 24, wherein the method further comprises:

The network device normalizes the pre-encoded data stream.
The method according to any one of claims 15 to 25, wherein the network device sending precoding indication information of at least one data stream to the terminal device includes:

The network device sends precoding indication information of N data streams to the terminal device, where the N data streams include the at least one data stream, and N is a positive integer.
The method according to any one of claims 15 to 26, wherein the network device sends precoding indication information of the at least one data stream through radio resource control RRC signaling or media access control MAC signaling.
The method according to claim 26 or 27, wherein the method further comprises:

The network device sends index information of the N data streams to the terminal device, and the index information in the N data streams is used by the terminal device to determine precoding information of the at least one data stream.
The method according to claim 28, wherein the index information is indicated to the terminal device through downlink signaling; or,

The index information is predetermined index information.
The method according to claim 26, 28 or 29, wherein N is the maximum number of data streams supported by the terminal device.
The method according to any one of claims 15 to 30, wherein the non-linear precoding indication information indicates whether a perturbation is added to each data stream or whether a modulo operation is performed by a bitmap.
The method according to claim 31, wherein when the corresponding bit value of the first data stream in the bitmap is the first value, it indicates that the first data stream has no disturbance added;

When the corresponding bit value of the first data stream in the bitmap is a second value, it indicates that the first data stream has added a disturbance.
The method according to claim 31, wherein when the corresponding bit value of the second data stream in the bitmap is the first value, it indicates that the second data stream does not perform a modulo operation;

When the corresponding bit value in the bitmap of the second data stream is a second value, the second data stream is instructed to perform a modulo operation.
The method according to any one of claims 15 to 30, wherein the precoding indication information is used to indicate n;

n means that n data streams add disturbance or modulo operation, or n means that n data streams do not add disturbance or modulo operation, and n is a non-negative integer.
A terminal device, including:

The first processing unit is configured to obtain precoding instruction information of at least one data stream, where the precoding instruction information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.
The terminal device according to claim 35, wherein the terminal device further comprises:

The first receiving unit is configured to receive the at least one data stream according to the precoding instruction information.
The terminal device according to claim 35 or 36, wherein the first processing unit is configured to obtain precoding indication information of N data streams, the N data streams including the at least one data stream, and N is Positive integer

Determining precoding instruction information of the at least one data stream from precoding instruction information of the N data streams.
The terminal device according to claim 37, wherein the terminal device obtains precoding indication information of the N data streams through radio resource control RRC signaling or media access control MAC signaling.
The terminal device according to claim 37, wherein the first processing unit is configured to pre-encode the N data streams based on the index information of the at least one data stream in the N data streams The indication information determines the precoding indication information of the at least one data stream.
The terminal device according to claim 39, wherein the index information is indicated to the terminal device through downlink signaling; or,

The index information is predetermined index information.
The terminal device according to claim 37, wherein the first processing unit is configured to receive data stream number information sent by a network device, and the data stream number information is used to indicate the number of the at least one data stream;

In the precoding instruction information of the N data streams, obtain disturbance information or modulus information corresponding to the data stream number information.
The terminal device according to any one of claims 37 to 41, wherein N is the maximum number of data streams supported by the terminal device.
The terminal device according to any one of claims 35 to 42, wherein the precoding instruction information indicates whether each data stream is added with a disturbance or is subjected to a modulo operation through a bitmap bitmap.
The terminal device according to claim 43, wherein when the corresponding bit value of the first data stream in the bitmap is the first value, it indicates that the first data stream does not add disturbance;

When the corresponding bit value of the first data stream in the bitmap is a second value, it indicates that the first data stream has added a disturbance.
The terminal device according to claim 43, wherein, when the corresponding bit value of the second data stream in the bitmap is the first value, it indicates that the second data stream does not perform the modulo operation;

When the corresponding bit value in the bitmap of the second data stream is a second value, the second data stream is instructed to perform a modulo operation.
The terminal device according to any one of claims 35 to 42, wherein the precoding instruction information is used to indicate n;

n means that n data streams add disturbance or modulo operation, or n means that n data streams do not add disturbance or modulo operation, and n is a non-negative integer.
The terminal device according to claim 36, wherein the first receiving unit is configured to add a disturbance to the third data stream in the third data stream of the at least one data stream when the precoding indication information indicates Modulo operations on the data symbols in the data stream; or,

When the precoding instruction information instructs the data symbol in the third data stream in the at least one data stream to perform a modulo operation, perform a modulo operation on the third data stream.
The terminal device according to any one of claims 35 to 47, wherein the first processing unit is further configured to perform linear detection on the at least one data stream.
A network device, the network device includes:

The sending unit is configured to send precoding indication information of at least one data stream to the terminal device, where the precoding indication information is used to indicate whether the at least one data stream adds a disturbance or whether to perform a modulo operation.
The network device according to claim 49, wherein the network device further comprises:

The second processing unit is configured to determine the data stream to which the disturbance needs to be added based on the downlink channel information, or to determine the data stream to perform the modulo operation.
The network device according to claim 50, wherein the second processing unit is further configured to perform precoding processing on the data stream based on downlink channel information, the precoding processing includes linear precoding processing and nonlinear precoding processing Encoding process

The sending unit is further configured to send the pre-encoded data stream to the terminal device.
The network device according to claim 51, wherein the downlink channel information includes:

A channel matrix of at least one multiple input multiple output MIMO channel split based on the channel information of the terminal device.
The network device according to claim 52, wherein the second processing unit is configured to determine a channel capacity corresponding to the channel matrix of the MIMO channel based on the channel matrix of the split MIMO channel;

Based on the channel capacity, the data stream to which the disturbance needs to be added is determined.
The network device according to claim 53, wherein the second processing unit is configured to load a disturbance vector on the data stream to which a disturbance needs to be added.
The network device according to claim 53 or 54, wherein the second processing unit is configured to determine the data stream corresponding to the n channel capacities with the largest channel capacity value as the data stream to which disturbance is to be added.
The network device according to claim 51, wherein the downlink channel information includes at least one of the following:

A channel correlation matrix determined by the network device according to channel reciprocity;

A channel correlation matrix reported by the terminal device;

The interference power information reported by the terminal device.
The network device according to claim 56, wherein the second processing unit is configured to determine a linear precoding vector based on the downlink channel information to obtain a first precoding matrix;

Determine a non-linear precoding vector based on the first precoding matrix;

Based on the non-linear precoding vector, a data stream that needs to be modulo processed is determined.
The network device according to claim 57, wherein the second processing unit is configured to perform modulo processing on the data stream that requires modulo processing.
The network device according to any one of claims 50 to 58, wherein the second processing unit is configured to perform normalization processing on the pre-encoded data stream.
The network device according to any one of claims 49 to 59, wherein the sending unit is configured to send precoding indication information of N data streams to the terminal device, the N data streams including the at least A data stream, N is a positive integer.
The network device according to any one of claims 49 to 60, wherein the sending unit is configured to send the precoding indication of the at least one data stream through radio resource control RRC signaling or media access control MAC signaling information.
The network device according to claim 60 or 61, wherein the sending unit is further configured to send the index information of the N data streams to the terminal device, the index information in the N data streams is used for The terminal device determines precoding information of the at least one data stream.
The network device according to claim 62, wherein the index information is indicated to the terminal device through downlink signaling; or,

The index information is predetermined index information.
The network device according to claim 60, 62 or 63, wherein N is the maximum number of data streams supported by the terminal device.
The network device according to any one of claims 49 to 64, wherein the non-linear precoding indication information indicates whether to add perturbation or perform modulo operation for each data stream in a bitmap bitmap manner.
The network device according to claim 65, wherein, when the corresponding bit value of the first data stream in the bitmap is the first value, it indicates that the first data stream has no disturbance added;

When the corresponding bit value of the first data stream in the bitmap is a second value, it indicates that the first data stream has added a disturbance.
The network device according to claim 65, wherein, when the corresponding bit value of the second data stream in the bitmap is the first value, it indicates that the second data stream has not performed a modulo operation;

When the corresponding bit value in the bitmap of the second data stream is a second value, the second data stream is instructed to perform a modulo operation.
The network device according to any one of claims 49 to 64, wherein the precoding indication information is used to indicate n;

n means that n data streams add disturbance or modulo operation, or n means that n data streams do not add disturbance or modulo operation, and n is a non-negative integer.
A terminal device includes a processor and a memory for storing a computer program that can run on the processor, wherein,

When the processor is used to run the computer program, the steps of the data processing method according to any one of claims 1 to 14 are performed.
A network device includes a processor and a memory for storing a computer program capable of running on the processor, wherein,

When the processor is used to run the computer program, the steps of the data processing method according to any one of claims 15 to 34 are performed.
A storage medium stores an executable program, and when the executable program is executed by a processor, the data processing method according to any one of claims 1 to 14 is implemented.
A storage medium stores an executable program, and when the executable program is executed by a processor, the data processing method according to any one of claims 15 to 34 is implemented.