CN112311429A - Transmission control method, base station, and storage medium - Google Patents

Abstract

The embodiment of the invention provides a transmission control method, a base station and a storage medium, wherein a subspace data stream channel gain matrix corresponding to an equivalent channel matrix is obtained by carrying out SVD on the equivalent channel matrix of a target terminal, the target terminal is a certain terminal currently served by the base station, a target inter-stream power distribution scheme of the target terminal is determined according to the subspace data stream channel gain matrix and a preset inter-stream power distribution rule, the target inter-stream power distribution scheme comprises a target data stream number and power corresponding to each target data stream, the target data stream number is the stream number of a data stream mapped by a code word, and in some implementation processes, the determined inter-stream power distribution scheme is matched with the actual channel condition from the base station to the terminal, so that the communication quality is improved.

Description

Transmission control method, base station and storage medium

technical field

The embodiments of the present invention relate to, but are not limited to, the field of communications, and specifically relate to, but are not limited to, a transmission control method, a base station, and a storage medium.

Background technique

The increasingly scarce spectrum resources and the continuous growth of wireless data traffic have become important factors driving new changes in wireless communication systems. In order to achieve higher spectral efficiency, multi-antenna technology has been widely used in wireless communication. A base station can simultaneously serve multiple users on the same time-frequency resource, that is, multi-user multi-antenna transmission technology.

When the base station sends data to the terminal (that is, the user) it serves, it usually needs to determine the number of data streams sent to the terminal (it should be understood that the number of data streams is the number of data streams to which the base station sends a codeword to the terminal. number of streams), and the corresponding power of each data stream. However, in the related art, the number of data streams to which a codeword sent by the base station is mapped and the power corresponding to each data stream are usually determined according to the number of antennas of the terminal. The power corresponding to each data stream does not match the actual channel condition from the base station to the terminal, resulting in poor communication quality.

SUMMARY OF THE INVENTION

The transmission control method, base station, and storage medium provided by the embodiments of the present invention mainly solve the technical problem of: determining the number of data streams to which a codeword sent by the base station to the terminal is mapped and the power corresponding to each data stream based on the number of antennas of the terminal , resulting in a mismatch between the determined parameters and the actual channel conditions and poor communication quality.

To solve the above technical problem, an embodiment of the present invention provides a transmission control method, including:

Performing singular value decomposition SVD on the equivalent channel matrix of the target terminal to obtain a subspace data stream channel gain matrix corresponding to the equivalent channel matrix, where the target terminal is a terminal currently served by the base station;

A power allocation scheme between target streams for the target terminal is determined according to the subspace data stream channel gain matrix and a preset inter-stream power allocation rule, where the target inter-stream power allocation scheme includes the number of target data streams and the correspondence between each target data stream. The power of the target data stream is the stream number of the data stream mapped by one codeword.

An embodiment of the present invention further provides a base station, including: a processor and a memory;

The processor is configured to execute one or more computer programs stored in the memory to implement the steps of the above-mentioned transmission control method.

An embodiment of the present invention further provides a storage medium, where one or more computer programs are stored in the storage medium, and the one or more computer programs can be executed by one or more processors to implement the above transmission control method. step.

The beneficial effects of the present invention are:

According to the transmission control method, device, and computer storage medium provided by the embodiments of the present invention, by performing singular value decomposition SVD on the equivalent channel matrix of the target terminal, the subspace data stream channel gain matrix corresponding to the equivalent channel matrix is obtained, and the target terminal is A terminal currently served by the base station determines the target inter-stream power allocation scheme of the target terminal according to the subspace data stream channel gain matrix and the preset inter-stream power allocation rule. The target inter-stream power allocation scheme includes the number of target data streams and each target data stream. The power corresponding to the stream, and the number of target data streams is the number of streams of data streams mapped by a codeword. In some implementation processes, the number of streams is determined based on the equivalent channel matrix of the target terminal and the preset power allocation rule between streams. Therefore, the determined inter-stream power allocation scheme can be matched with the actual channel conditions between the base station and the terminal, so as to meet other preset requirements and improve the communication quality.

Other features of the present invention and corresponding benefits are set forth in later parts of the specification, and it should be understood that at least some of the benefits will become apparent from the description of the present specification.

Description of drawings

1 is a flowchart of a transmission control method according to Embodiment 1 of the present invention;

2 is a flowchart of a process of determining an equivalent channel matrix of a target terminal according to Embodiment 1 of the present invention;

3 is a flowchart of a process for determining an equal-interference suppression matrix of a target terminal according to Embodiment 1 of the present invention;

4 is a flowchart of a process for determining the number of target data streams of a target terminal according to Embodiment 1 of the present invention;

5 is a schematic diagram of the relationship between the number of data streams and the total capacity of data transmission according to Embodiment 1 of the present invention;

6 is a flowchart of a process of determining the transmit power of a target terminal according to Embodiment 1 of the present invention;

7 is a flowchart of a transmission control method according to Embodiment 2 of the present invention;

8 is a flowchart of a transmission control method according to Embodiment 3 of the present invention;

FIG. 9 is a schematic structural diagram of a base station according to Embodiment 4 of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1:

In the related art, the number of data streams to which a codeword sent by the base station is mapped and the power corresponding to each data stream are determined based on the number of antennas of the terminal, resulting in a mismatch between the determined parameters and actual channel conditions and poor communication quality. In order to solve the above technical problem, an embodiment of the present invention provides a transmission control method. Please refer to FIG. 1. FIG. 1 is a flowchart of the transmission control method provided by the embodiment of the present invention. The transmission control method includes:

S101. Perform SVD (Singular Value Decomposition, singular value decomposition) on an equivalent channel matrix of a target terminal to obtain a subspace data stream channel gain matrix corresponding to the equivalent channel matrix.

对其进行SVD得到：

其中，V_k ^H为V_k的共轭转置矩阵，V_k为第k个目标终端的数据流传输矩阵，Λ_k为第k个目标终端的子空间数据流信道增益矩阵，

其中λ_k,j是第j个奇异值，表示对等效信道矩阵做SVD分解后，第j个子信道的增益，且设降序排列，即

也就是说，对目标终端的等效信道矩阵进行SVD后，可以得到该目标终端的子空间数据流信道增益矩阵和数据流传输矩阵。In this embodiment of the present invention, the target terminal is a terminal currently served by the base station, and the number of all target terminals currently served by the base station is denoted as K. It should be understood that K is an integer greater than or equal to 0. The target terminal may be a single-antenna terminal or a multi-antenna terminal. Perform SVD on the equivalent channel matrix of the target terminal to obtain the subspace data stream channel gain matrix of the target terminal. Among them, the equivalent channel matrix of the kth (it should be understood that 0≤k≤K) target terminal is denoted as

SVD it to get:

Among them, V _k ^H is the conjugate transpose matrix of V _k , V _k is the data stream transmission matrix of the k th target terminal, Λ _k is the subspace data stream channel gain matrix of the k th target terminal,

where λ _k,j is the jth singular value, which represents the gain of the jth subchannel after SVD decomposition of the equivalent channel matrix, and it is arranged in descending order, that is,

That is to say, after performing SVD on the equivalent channel matrix of the target terminal, the subspace data stream channel gain matrix and the data stream transmission matrix of the target terminal can be obtained.

In the embodiment of the present invention, before performing SVD on the equivalent channel matrix of the target terminal, the equivalent channel matrix of the target terminal also needs to be determined, and the determination process can be shown in FIG. 2 :

S201. Obtain a downlink channel coefficient matrix of a target terminal.

In the embodiment of the present invention, the downlink channel coefficient matrix of the target terminal is acquired, that is, the downlink channel coefficient matrix from the base station to the target terminal is acquired. Wherein, the downlink channel coefficient matrix of the k-th target terminal is denoted as H _k .

In the implementation of the present invention, when acquiring the downlink channel coefficient matrix of the target terminal, the downlink channel coefficient matrix of the target terminal can be determined based on the channel reciprocity and the uplink channel coefficient of the target terminal, that is, according to the channel reciprocity, the target terminal's downlink channel coefficient matrix can be determined. The uplink channel coefficients are converted into a downlink channel coefficient matrix. For the uplink channel coefficient of the target terminal, the base station may perform uplink channel estimation according to the pilot frequency sent by the target terminal to obtain the uplink channel coefficient.

In this embodiment of the present invention, when acquiring the downlink channel coefficient matrix of the target terminal, the downlink channel coefficient matrix of the target terminal may also be determined according to the downlink channel coefficients reported by the target terminal. That is, the target terminal performs downlink channel estimation according to the pilot frequency sent by the base station, and feeds back the acquired downlink channel coefficients to the base station, and the base station determines the downlink channel coefficient matrix of the target terminal based on the downlink channel coefficients reported by the target terminal.

其中，N_BS为基站上配置的天线的数量，

为第k个目标终端上配置的天线数；将第k个目标终端的第二下行信道系数矩阵记为：

其中，

则

其中，

In this embodiment of the present invention, the above two manners for obtaining the downlink channel coefficient matrix may also be combined. For example, when acquiring the downlink channel coefficient matrix of the target terminal, the first downlink channel coefficient matrix of the target terminal may be determined based on the uplink channel coefficients of the target terminal according to channel reciprocity, and the target terminal may be determined based on the downlink channel parameters reported by the target terminal. The second downlink channel coefficient matrix of the target terminal is obtained by combining the first downlink channel coefficient matrix and the second downlink channel coefficient matrix to obtain the downlink channel coefficient matrix of the target terminal. The downlink channel coefficient matrix can make full use of the channel information and make the obtained information more comprehensive and accurate. Wherein, when combining, the first downlink channel coefficient matrix and the second downlink channel coefficient matrix may be vertically spliced to obtain the downlink channel coefficient matrix. Among them, the first downlink channel coefficient matrix of the kth target terminal is denoted as:

Among them, N _BS is the number of antennas configured on the base station,

is the number of antennas configured on the kth target terminal; denote the second downlink channel coefficient matrix of the kth target terminal as:

in,

but

in,

S202. Determine the interference suppression matrix of the target terminal based on the downlink channel coefficient matrix.

In the embodiment of the present invention, after acquiring the downlink channel coefficient matrix of the target terminal, the interference suppression matrix of the target terminal is determined based on the downlink channel coefficient matrix, wherein the interference suppression matrix of the kth target terminal is recorded as:

Among them, the determination process of the interference suppression matrix of the target terminal can be shown in Figure 3:

S301. Perform QR decomposition (orthogonal triangular decomposition) on the downlink channel coefficient matrix to obtain an orthogonal channel matrix of the target terminal.

In the embodiment of the present invention, QR decomposition is performed on the downlink channel coefficient matrix of the target terminal to obtain an orthogonal matrix and an upper triangular matrix, and the obtained orthogonal matrix is the orthogonal channel matrix of the target terminal. Among them, the formula for QR decomposition of the downlink channel coefficient matrix of the kth target terminal is:

为H_k的共轭转置矩阵，Q_k为对

进行QR分解得到的正交矩阵，其为第k个目标终端的正交信道矩阵，R_k为对

进行QR分解得到的上三角形矩阵。in,

is the conjugate transpose matrix of H _k , and Q _k is the pair

The orthogonal matrix obtained by QR decomposition is the orthogonal channel matrix of the k-th target terminal, and R _k is the pair

The upper triangular matrix obtained by QR decomposition.

S302. Combine the orthogonal channel matrices of all target terminals currently served by the base station to obtain a joint orthogonal channel matrix.

In this embodiment, when the orthogonal channel matrices of all target terminals are combined, horizontal splicing can be performed. Wherein, the joint channel orthogonal matrix is denoted as Q, then: Q=[Q ₁ ,...,Q _k ,...Q _K ] ^H .

S303. Perform matrix construction based on the joint orthogonal channel matrix and preset noise-related parameters to obtain a construction matrix.

The preset noise-related parameter is a noise variance coefficient σ ² or a loading factor δ ² , where the loading factor is a real number greater than 0, and specific settings may be determined according to actual channel conditions.

或

When performing matrix construction to obtain a construction matrix, the joint orthogonal channel matrix Q can be conjugated transposed to obtain a first splicing matrix Q ^H ; the preset noise-related parameters are multiplied by the identity matrix to obtain a second splicing matrix, wherein the first splicing matrix is The number of columns of the second splicing matrix is the same as the number of columns of the first splicing matrix, that is, the second splicing matrix is σI, or δI, where I is the identity matrix, and the number of columns is the same as the number of columns of the first splicing matrix; Then, the first splicing matrix and the second splicing matrix are longitudinally spliced to obtain a construction matrix, where the construction matrix is denoted as A, then

or

S304. Obtain a joint interference suppression matrix based on the construction matrix.

其中

为对构造矩阵A进行QR分解得到的正交矩阵，

为第一矩阵，其的行数和列数与Q^H的行数和列数相同，

为第二矩阵，其行数和列数与δI(或σI)的行数和列数相同；然后，将第一矩阵和共轭转置后的第二矩阵相乘，并除以噪声相关参数得到联合干扰抑制矩阵G，

或

In the embodiment of the present invention, QR decomposition is first performed on the construction matrix A, and the orthogonal matrix obtained by the decomposition is longitudinally split into a first matrix and a second matrix. The number of rows and columns are the same, and the number of rows and columns of the second matrix is the same as the number of rows and columns of the second splicing matrix. The number of rows and columns of the first matrix, namely

in

is an orthogonal matrix obtained by QR decomposition of the construction matrix A,

is the first matrix whose number of rows and columns are the same as those of Q ^H ,

is the second matrix with the same number of rows and columns as δI (or σI); then, multiply the first matrix and the conjugate-transposed second matrix and divide by the noise-related parameter The joint interference suppression matrix G is obtained,

or

S305. Obtain the interference suppression matrix of the target terminal according to the joint interference suppression matrix.

得到第k个目标终端的干扰抑制矩阵

After the joint interference matrix suppression matrix is obtained, the joint interference matrix is expressed in the form G=[G ₁ ,...,G _k ,...,G _K ] corresponding to each target terminal, and then G _k is decomposed by QR to obtain

Obtain the interference suppression matrix of the kth target terminal

In the embodiment of the present invention, a joint orthogonal channel matrix is obtained by merging the orthogonal channel matrices of each target terminal, a construction matrix is obtained by constructing a matrix based on the joint channel matrix, and QR decomposition is performed on the construction matrix, and each target terminal is obtained by calculation. Therefore, a low-complexity terminal interference matrix null-space solution is realized.

It should be noted that, in this embodiment of the present invention, the interference suppression matrix of the target terminal may also be calculated in other manners.

S203. Multiply the interference suppression matrix for the target terminal and the downlink channel coefficient matrix to obtain an equivalent channel matrix of the target terminal.

For the kth target terminal, its equivalent channel matrix is

S102. Determine a target inter-stream power allocation scheme of the target terminal according to the subspace data stream channel gain matrix and a preset inter-stream power allocation rule.

The power allocation scheme between target streams includes the number of target data streams and the power corresponding to each target data stream. It should be understood that the number of target data streams is the number of streams of data streams mapped by one codeword.

It should be noted that, the number of data streams transmitted by the base station to the target terminal should be less than or equal to the number of antennas configured on the target terminal. Therefore, in this embodiment of the present invention, the number of data streams supported by the target terminal (referred to as to be selected later) is required. The number of data streams, the number of data streams to be selected is a value smaller than the number of antennas of the target terminal), according to the subspace data stream channel gain matrix of the target terminal and the preset power allocation rule between streams, determine a data stream number as the target data stream number , and determine the power of the target data stream. For example, assuming that the number of antennas configured on a target terminal is 4, the number of data streams to be selected are 1, 2, 3, and 4 respectively. Set the power distribution rule between streams, select one from 1, 2, 3, and 4 as the number of target data streams, and determine the power of the target data stream.

In the embodiment of the present invention, the preset inter-stream power allocation rule includes the principle of maximizing the total capacity of data transmission. When determining the target inter-stream power allocation scheme for the target terminal, it includes: according to the subspace data stream channel gain matrix of the target terminal and The total data transmission capacity corresponding to the target terminal determines the power allocation scheme between target streams for the target terminal. The number of target data streams is the number of data streams with the largest corresponding total data transmission capacity among the number of data streams to be selected. The power is determined according to the subspace data stream channel gain matrix of the target terminal and the number of target data streams. For example, if the number of antennas of the target terminal is 2, the number of data streams to be selected is 1 and 2 respectively. If the number of data streams is 1, the total data transmission capacity of the target terminal is smaller than that of the target terminal when the number of data streams is 2. For the total transmission capacity, 2 is used as the target data stream number of the target terminal, and based on the target data stream number (ie 2), the power corresponding to the first data stream and the power corresponding to the second data stream are calculated respectively.

It should be noted that the total data transmission capacity of the target terminal is determined according to the number of data streams of the target terminal and the subspace data stream channel gain matrix, and the power corresponding to each data stream of the target terminal is determined according to the number of data streams of the target terminal and the subspace data stream channel. The gain matrix is determined.

与其子空间数据流信道增益矩阵和数据流数j_k的对应关系如下：

其中，λ_k,j可以从Λ_k中获取。For the kth target terminal, the power corresponding to the jth data stream (that is, the power on the jth subchannel)

The corresponding relationship between the subspace data stream channel gain matrix and the data stream number j _k is as follows:

Among them, λ _k,j can be obtained from Λ _k .

For the k-th target terminal, the corresponding relationship between the base station's total data transmission capacity C _k and its subspace data stream channel gain matrix and data stream number j _k is as follows:

C _k =j _k ·log(1+γ _k,j )

where γ _k,j is the signal-to-noise ratio on the jth subchannel of the kth target terminal,

Therefore, based on the above formula, the total data transmission capacity corresponding to the number of data streams to be selected of the target terminal can be determined, and the power corresponding to each data stream when the number of data streams is the number of data streams to be selected. Then, the number of data streams with the largest total data transmission capacity is selected from the number of data streams to be selected as the number of target data streams, and the power corresponding to each target data stream is determined when the number of data streams is the number of target data streams.

分别确定第一条数据流对应的功率，第二条数据流对应的功率，第三条数据流对应的功率。Among them, in order to determine the number of data streams corresponding to the maximum total data transmission capacity from the number of data streams to be selected in the target terminal, the total data transmission capacity corresponding to the number of data streams to be selected can be determined, and then the total data transmission capacity can be determined. The number of data streams to be selected corresponding to the maximum capacity is used as the number of target data streams. For example, if the number of antennas of the target terminal is 3, then the total data transmission capacity corresponding to the number of antennas to be selected is 1, 2, and 3. Suppose that when the number of antennas is 3, the total data transmission capacity of the target terminal is the largest, then 3 is used as the target number of streams, and based on the number of target streams and

Determine the power corresponding to the first data stream, the power corresponding to the second data stream, and the power corresponding to the third data stream, respectively.

Alternatively, in order to determine the number of data streams corresponding to the maximum total data transmission capacity from the number of data streams to be selected in the target terminal, as shown in Figure 4 below, the determination can be performed through the following iterative process, including:

S401. Set the initial value of the first data stream number to 0.

S402. Calculate the total capacity of the first data transmission corresponding to the number of the first data streams.

The total capacity of the first data transmission can be calculated by referring to the manner described above, and details are not repeated here.

S403 , the number of the second data stream=the number of the first data stream+1.

That is, at this time, the second data stream number=0+1=1.

S404. Calculate the total capacity of the second data transmission corresponding to the number of the second data streams.

The second total data transmission capacity can be calculated by referring to the manner described above, and details are not repeated here.

S405. Whether the total capacity of the second data transmission is greater than or equal to the total capacity of the first data transmission.

If yes, go to S407; if not, go to S406.

Wherein, the total second data transmission capacity and the first data transmission total capacity may be calculated by referring to the manner described above, which will not be repeated here.

S406. Determine a power allocation scheme between target streams of the target terminal based on the first data stream number.

That is, when the second total data transmission capacity is less than the first data transmission total capacity, the target terminal power allocation scheme between target streams is determined based on the first data stream number, where the target data stream number is the first data stream number.

It should be noted that, referring to the above formula, it can be known that the relationship between the number of data streams and the total capacity of data transmission is: as the number of data streams increases, the total capacity of data transmission presents a trend of first increasing and then decreasing. For example, referring to FIG. 5, which is a relationship diagram between the total data transmission capacity and the number of data streams, in which the abscissa represents the number of data streams, and the ordinate represents the total capacity of data transmission. Therefore, if the number of data streams increases from 1 in turn In the process of the first occurrence, the total data transmission capacity corresponding to the larger number of data streams is smaller than the total data transmission capacity corresponding to the smaller number of data streams, then the total data transmission capacity corresponding to the smaller number of data streams is the maximum value . Therefore, in this embodiment, since the value of the second data stream number starts from 1 and increases sequentially, and the second data stream number=first data stream number+1 (that is, the second data stream number is greater than the first data stream number) ), therefore, if the total data transmission capacity corresponding to the second data stream number (larger data stream number) is smaller than the data transmission total capacity corresponding to the first data stream number (smaller data stream number), then It indicates that at this time, the first data transmission total capacity corresponding to the first data stream number (the smaller data stream number) is the maximum value, and therefore, the first data stream number is taken as the target data stream number.

S407. Determine whether the number of the second data streams is less than the number of antennas of the target terminal.

If yes, go to S408, if not, go to S409.

S408, the number of the first data stream=the number of the second data stream; the total capacity of the first data transmission=the total capacity of the second data transmission; the number of the second data stream=the number of the second data stream+1.

Based on the relationship between the number of data streams and the total capacity of data transmission, at this time, the total capacity of the second data transmission corresponding to the number of second data streams (larger number of data streams) is greater than that corresponding to the number of first data streams (smaller number of data streams) and the number of second data streams is less than the number of antennas of the target terminal, it means that the maximum value of the corresponding total data transmission capacity among the number of data streams supported by the terminal has not yet been found. The value of the first data stream number, the value of the first data stream number is set to the value of the second data stream number, the value of the first data transmission total capacity is set to the value of the second data transmission total capacity, and the second data stream Add 1 to the value of the number, and turn to S404 for the next round of circulation, that is, the value of the first data stream number in the new round of circulation=the value of the second data stream number in the previous round of circulation, a new round of circulation The value of the total capacity of the first data transmission in = the value of the total capacity of the second data transmission in the previous cycle, the value of the number of second data streams in the new cycle = the value of the number of second data streams in the previous cycle +1.

For example, it is assumed that in the first cycle, the number of the first data stream=0 and the number of the second data stream=1; then in the next cycle, the number of the first data stream=1 and the number of the second data stream=2.

S409. Determine a power distribution scheme between target streams of the target terminal based on the number of the second data streams.

It should be understood that the value of the number of the second data streams increases sequentially from 1. Therefore, if the judgment result of S407 is no (that is, the number of the second data streams is not less than the number of antennas of the target terminal), it means that at this time The number of second data streams = the number of antennas of the target terminal. Because the number of second data streams is already the maximum number of data streams supported by the target terminal (that is, the number of antennas of the target terminal), and the total capacity of the second data transmission corresponding to the number of second data streams is greater than or equal to the number of first data streams corresponding to the number of first data streams The total data transmission capacity, therefore, indicates that the second total data transmission capacity is the maximum value of the corresponding total data transmission capacity among the data streams supported by the target terminal. Therefore, the inter-stream power allocation scheme of the target terminal is determined based on the second data stream number, that is, at this time, the target data stream number is the second data stream number.

In this embodiment of the present invention, the preset inter-stream power allocation rule includes the principle of maximizing total throughput. When determining the target inter-stream power allocation scheme of the target terminal, the target terminal's subspace data stream channel gain matrix and the target terminal's corresponding The total throughput determines the power allocation scheme between target streams of the target terminal, wherein the number of target data streams is the number of data streams with the largest total throughput among the number of data streams to be selected, and the power corresponding to the target data stream is based on the target terminal's power. The subspace data stream channel gain matrix and the target data stream number are determined.

It should be noted that the total throughput of the target terminal is determined according to the number of data streams of the target terminal and the subspace data stream channel gain matrix, and the power corresponding to each data stream of the target terminal is determined according to the number of data streams of the target terminal and the subspace data stream channel gain. Matrix OK.

For the kth target terminal, the corresponding relationship between its total throughput T _k and the number of data streams j _k and the subspace data stream channel gain matrix is as follows:

Among them, r _k,j is the normalized transmission code rate corresponding to the modulation and coding scheme (MCS, Modulation and Coding Scheme) level selected by the jth subchannel of the kth target terminal, and ε _k,j is the kth target terminal The block error rate (BLER, Block Error Rate) corresponding to the MCS level selected by the jth subchannel. r _k,j and ε _k,j are determined by γ _k,j , and the normalized code rate and BLER of all sub-channels are the same.

Wherein, the method of determining the corresponding number of data streams with the largest total throughput from the number of data streams to be selected of the target terminal may refer to the above-mentioned method to determine the corresponding data transmission from the number of data streams to be selected of the target terminal The method for the number of data streams with the largest total capacity will not be repeated here.

其中，此处的J_k为目标数据流数，Σ_k的主对角线元素为

其他元素为0，

为第j个目标子信道(即目标数据流)的功率。在分配功率时，需要使得各个目标子信道的等效增益，即信噪比相等，也即

其中第j个目标子信道的等效信道增益，即信噪比为

In the embodiment of the present invention, the power allocation matrix between the target streams of the kth target terminal is denoted as

Among them, J _k here is the number of target data streams, and the main diagonal element of Σ _k is

other elements are 0,

is the power of the j-th target subchannel (ie, the target data stream). When allocating power, it is necessary to make the equivalent gain of each target sub-channel, that is, the signal-to-noise ratio, equal, that is,

The equivalent channel gain of the j-th target subchannel, that is, the signal-to-noise ratio is

其中，ρ_k为第k个目标终端的功率分配因子。将所有目标终端的预编码矩阵进行合并W＝[W₁,…,W_k,…,W_K]，考虑基站侧的功率约束归一化因子

于是基站下行发送的预编码矩阵

这样，基站可以基于

对发送给各目标终端的数据进行编码。In this embodiment of the present invention, after determining the power allocation scheme between target streams of the target terminal, the target terminal may also be determined based on the interference suppression matrix, the data stream transmission matrix, the power allocation scheme between target streams, and the transmit power allocated to the target terminal. The precoding matrix corresponding to the terminal. Among them, the precoding of the k-th target terminal is denoted as W _k ,

Among them, ρ _k is the power allocation factor of the k-th target terminal. Combine the precoding matrices of all target terminals W=[W ₁ ,...,W _k ,...,W _K ], considering the power constraint normalization factor on the base station side

So the precoding matrix sent by the base station downlink

In this way, the base station can be based on

The data sent to each target terminal is encoded.

Since the power allocation factor of the target terminal needs to be determined when determining the precoding matrix of the target terminal, before determining the precoding matrix of the target terminal, it can also be determined according to the total transmit power of the base station and the preset terminal power allocation rule The transmit power allocated to the target terminal.

其中，P_k为分配给第k个目标终端的发送功率，P_BS为基站的总发送功率，K为基站当前服务的所有目标终端的数量。由于

因此，

其中，

The preset terminal power allocation rule includes that the transmit power of each terminal is equal, and the total transmit power of the base station is evenly allocated to all target terminals currently served by the base station, that is,

Among them, P _k is the transmit power allocated to the k-th target terminal, P _BS is the total transmit power of the base station, and K is the number of all target terminals currently served by the base station. because

therefore,

in,

Alternatively, the preset terminal power allocation rule includes that the transmit power of each data stream is equal, and as shown in FIG. 6 , the manner of determining the transmit power of the target terminal includes:

S601. Determine the total number of data streams according to the power allocation rule between target streams of the target terminal.

The total number of data streams is the sum of the number of target data streams of all target terminals.

S602. Determine the average power of the data stream according to the total transmit power of the base station and the total number of data streams.

Average data flow power=total transmit power of base station/total data flow number.

S603. Determine the transmit power allocated to the target terminal according to the average power of the data stream and the target data stream number of the target terminal.

则

That is,

but

The transmission control method provided by the embodiment of the present invention obtains the subspace data stream channel gain matrix corresponding to the equivalent channel matrix by performing singular value decomposition SVD on the equivalent channel matrix of the target terminal, and the target terminal is a terminal currently served by the base station. , according to the subspace data stream channel gain matrix and the preset inter-stream power allocation rule to determine the target terminal's target inter-stream power allocation scheme, the target inter-stream power allocation scheme includes the number of target data streams and the power corresponding to each target data stream, the target data The number of streams is the number of streams of data streams mapped by a codeword, which can make the determined inter-stream power allocation scheme match the actual channel conditions between the base station and the terminal, thereby improving the communication quality, and based on the preset inter-stream power allocation rules The inter-flow power allocation scheme of the target terminal is determined, so that the determined inter-flow power allocation scheme can meet other preset requirements and further improve the communication quality.

Embodiment 2:

For better understanding of the present invention, this embodiment is described in conjunction with more specific examples. Please refer to FIG. 7, which is a flowchart of a transmission control method provided by an embodiment of the present invention, including:

S701. Obtain a downlink channel coefficient matrix of a target terminal.

In the embodiment of the present invention, the kth terminal is used as an example for description. It should be understood that, for the calculation methods of other target terminals, please refer to the kth target terminal. It should be understood that k is greater than 0 and less than or equal to K, K is the number of target terminals currently served by the base station.

基于第k个目标终端上报的下行信道参数确定其第二下行信道系数矩阵

将第一下行信道系数矩阵和第二下行信道系数矩阵进行纵向拼接得到其下行信道系数矩阵

其中，

为第k个目标终端上配置的天线数，k为目标终端的标识。According to the channel reciprocity, the base station determines its first downlink channel coefficient matrix based on the uplink channel coefficient of the kth target terminal

Determine the second downlink channel coefficient matrix based on the downlink channel parameters reported by the kth target terminal

Vertically splicing the first downlink channel coefficient matrix and the second downlink channel coefficient matrix to obtain its downlink channel coefficient matrix

in,

is the number of antennas configured on the kth target terminal, and k is the identifier of the target terminal.

S702. Perform orthogonal QR decomposition on the downlink channel coefficient matrix of the target terminal to obtain an orthogonal channel matrix of the target terminal.

其中，

为H_k的共轭转置矩阵，Q_k为对

进行QR分解得到的正交矩阵，Q_k为第k个目标终端的正交信道矩阵，R_k为对

进行QR分解得到的上三角形矩阵。The formula for the base station to perform QR decomposition on the downlink channel coefficient matrix of the kth target terminal is:

in,

is the conjugate transpose matrix of H _k , and Q _k is the pair

The orthogonal matrix obtained by QR decomposition, Q _k is the orthogonal channel matrix of the k-th target terminal, and R _k is the pair

The upper triangular matrix obtained by QR decomposition.

S703, perform horizontal splicing of the orthogonal channel matrices of all target terminals currently served by the base station to obtain a joint orthogonal channel matrix.

The joint channel orthogonal matrix is denoted as Q, Q=[Q ₁ ,...,Q _k ,... Q _K ] ^H .

S704. Perform matrix construction based on the joint orthogonal channel matrix and the noise variance coefficient to obtain a construction matrix.

其中，Q^H为联合正交信道矩阵Q的共轭转置矩阵，σ²为噪声方差系数，I为列数与Q^H列数相同的单位矩阵。Construct the matrix

Among them, Q ^H is the conjugate transpose matrix of the joint orthogonal channel matrix Q, σ ² is the noise variance coefficient, and I is the identity matrix with the same number of columns as Q ^H.

S705. Obtain a joint interference suppression matrix based on the construction matrix.

为对构造矩阵A进行QR分解得到的正交矩阵，将

进行纵向拆分为

和

其中，

的行数和列数分别与Q^H的行数和列数相同，

的行数和列数分别与σI的行数和列数相同。联合干扰矩阵G，

The construction matrix A is subjected to QR decomposition,

For the orthogonal matrix obtained by QR decomposition of the construction matrix A, the

Split vertically into

and

in,

The number of rows and columns of is the same as the number of rows and columns of Q ^H , respectively,

The number of rows and columns of is the same as the number of rows and columns of σI, respectively. Joint interference matrix G,

S706. Obtain the interference suppression matrix of the target terminal according to the joint interference suppression matrix.

得到第k个目标终端的干扰抑制矩阵

The joint interference matrix is expressed in the form G=[G ₁ ,...,G _k ,...,G _K ] corresponding to each target terminal, and then QR decomposition is performed on G _k to obtain

Obtain the interference suppression matrix of the kth target terminal

S707. Multiply the interference suppression matrix of the target terminal and the downlink channel coefficient matrix to obtain an equivalent channel matrix of the target terminal.

Among them, the equivalent channel matrix of the kth target terminal is:

S708. Perform SVD on the equivalent channel matrix of the target terminal to obtain a subspace data stream channel gain matrix and a data stream transmission matrix.

其中，V_k ^H为V_k的共轭转置矩阵，V_k为第k个目标终端的数据流传输矩阵，Λ_k为第k个目标终端的子空间数据流信道增益矩阵，

其中λ_k,j是第j个奇异值，表示对等效信道矩阵做SVD分解后，第j个子信道的增益。SVD decomposition for the equivalent channel matrix of the kth terminal:

Among them, V _k ^H is the conjugate transpose matrix of V _k , V _k is the data stream transmission matrix of the k th target terminal, Λ _k is the subspace data stream channel gain matrix of the k th target terminal,

where λ _k,j is the jth singular value, which represents the gain of the jth sub-channel after the equivalent channel matrix is decomposed by SVD.

S709. According to the subspace data stream channel gain matrix of the target terminal, from the number of data streams to be selected, the corresponding number of data streams with the largest total data transmission capacity is selected as the number of target data streams.

The number of data streams to be selected is a value smaller than the number of antennas of the target terminal.

In this embodiment of the present invention, the number of data streams with the largest total data transmission capacity is selected from the number of data streams to be selected as the number of target data streams. Among them, the target data stream number J _k of the k-th target terminal is determined through the following iterative process:

1. Set the initial value of A to 0;

和公式C_k＝j_k·log(1+γ_k,j)，计算第k个目标终端，在j_k＝A时对应的数据传输总容量C_k(A)；2. According to the formula

and the formula C _k =j _k ·log(1+γ _k,j ), calculate the kth target terminal, and the corresponding total data transmission capacity C _k (A) when j _k =A;

3. B=A+1; that is, B is always 1 greater than A;

和公式C_k＝j_k·log(1+γ_k,j)，计算第k个目标终端，在j_k＝B时对应的数据传输总容量C_k(B)：4. According to the formula

And the formula C _k =j _k ·log(1+γ _k,j ), calculate the kth target terminal, and the corresponding total data transmission capacity C _k (B) when j _k =B:

5. Determine whether C _k (B) is greater than or equal to C _k (A), if so, go to 6, if not, go to 7;

6. Determine whether B is less than

设置A＝B，C_k(A)＝C_k(B)，B＝B+1，并转4进行循环；其中，

为第k个目标终端上的天线数；if

Set A=B, C _k (A)=C _k (B), B=B+1, and turn 4 to cycle; where,

is the number of antennas on the kth target terminal;

则此时，

则输出J_k＝B，结束，即此时，目标数据流数＝B；if B is not less than

Then at this time,

Then output J _k =B, end, that is, at this time, the number of target data streams = B;

7. Output J _k =A, end, that is, at this time, the number of target data streams = A.

S710. Determine a power distribution scheme between target streams of the target terminal according to the number of target data streams.

确定在j_k为J_k时，第j条目标数据流对应的功率

第k个目标终端的目标流间功率分配矩阵记为

其中，此处的J_k为目标数据流数，Σ_k的主对角线元素为

其他元素为0。The power allocation scheme between target streams includes the number of target data streams of the target terminal and the power corresponding to each target data stream. For the kth target terminal, according to the formula

Determine the power corresponding to the jth target data stream when _jk is _Jk

The power allocation matrix between the target streams of the kth target terminal is denoted as

Among them, J _k here is the number of target data streams, and the main diagonal element of Σ _k is

Other elements are 0.

S711. Determine the transmission power allocated to the target terminal according to the total transmission power of the base station and the equalization rule of the transmission power of each terminal.

其中，P_BS为基站的总发送功率。For the kth target terminal, the transmit power allocated to it

Among them, _PBS is the total transmit power of the base station.

S712. Determine a precoding matrix corresponding to the target terminal based on the interference suppression matrix of the target terminal, the data stream transmission matrix, the power allocation scheme between target streams, and the transmit power allocated to the target terminal.

其中，ρ_k为第k个目标终端的功率分配因子，

后续通信过程中，基站可以基于W_k对发送给第k个目标终端的数据进行编码。For the kth target terminal, its precoding is

Among them, ρ _k is the power allocation factor of the k-th target terminal,

In the subsequent communication process, the base station may encode the data sent to the k th target terminal based on W _k .

于是基站下行发送的预编码矩阵

这样，基站可以基于

对发送给各目标终端的数据进行编码。Combine the precoding matrices of all target terminals W=[W ₁ ,...,W _k ,...,W _K ], considering the power constraint normalization factor on the base station side

So the precoding matrix sent by the base station downlink

In this way, the base station can be based on

The data sent to each target terminal is encoded.

In the transmission control method provided by the embodiment of the present invention, the subspace data stream channel gain matrix corresponding to the equivalent channel matrix is obtained by performing SVD on the equivalent channel matrix of the target terminal, and the target terminal is a terminal currently served by the base station. The spatial data stream channel gain matrix and the principle of maximizing the preset total data transmission capacity determine the power allocation scheme between target streams of the target terminal. The power allocation scheme between target streams includes the number of target data streams and the power corresponding to each target data stream, and the target data stream The number is the number of streams of data streams mapped by one codeword. In some implementation processes, since the inter-stream power allocation scheme is determined based on the equivalent channel matrix of the target terminal, the determined inter-stream power allocation scheme can be The actual channel conditions between the base station and the terminal are matched, so as to improve the communication quality, and the inter-stream power allocation scheme of the target terminal is determined based on the principle of maximizing the total data transmission capacity, so that the data corresponding to the determined inter-stream power allocation scheme can be made The total transmission capacity is the largest.

Embodiment three:

For better understanding of the present invention, this embodiment is described in conjunction with more specific examples. Please refer to FIG. 8. FIG. 8 is a flowchart of a transmission control method provided by an embodiment of the present invention, including:

S801. Obtain a downlink channel coefficient matrix of a target terminal.

In the embodiment of the present invention, the kth terminal is used as an example for description. It should be understood that, for the calculation methods of other target terminals, please refer to the kth target terminal. It should be understood that k is greater than 0 and less than or equal to K, K is the number of target terminals currently served by the base station.

基于第k个目标终端上报的下行信道参数确定其第二下行信道系数矩阵

将第一下行信道系数矩阵和第二下行信道系数矩阵进行纵向拼接得到其下行信道系数矩阵

其中，

为第k个目标终端上配置的天线数，k为目标终端的标识。According to the channel reciprocity, the base station determines its first downlink channel coefficient matrix based on the uplink channel coefficient of the kth target terminal

Determine the second downlink channel coefficient matrix based on the downlink channel parameters reported by the kth target terminal

Vertically splicing the first downlink channel coefficient matrix and the second downlink channel coefficient matrix to obtain its downlink channel coefficient matrix

in,

is the number of antennas configured on the kth target terminal, and k is the identifier of the target terminal.

S802. Perform orthogonal QR decomposition on the downlink channel coefficient matrix of the target terminal to obtain an orthogonal channel matrix of the target terminal.

其中，

为H_k的共轭转置矩阵，Q_k为对

进行QR分解得到的正交矩阵，Q_k为第k个目标终端的正交信道矩阵，R_k为对

进行QR分解得到的上三角形矩阵。The formula for QR decomposition of the downlink channel coefficient matrix of the kth target terminal is:

in,

is the conjugate transpose matrix of H _k , and Q _k is the pair

The orthogonal matrix obtained by QR decomposition, Q _k is the orthogonal channel matrix of the k-th target terminal, and R _k is the pair

The upper triangular matrix obtained by QR decomposition.

S803: Perform horizontal splicing of the orthogonal channel matrices of all target terminals currently served by the base station to obtain a joint orthogonal channel matrix

The joint channel orthogonal matrix is denoted as Q, Q=[Q ₁ ,...,Q _k ,... Q _K ] ^H .

S804. Perform matrix construction based on the joint orthogonal channel matrix and the loading factor to obtain a construction matrix.

其中，Q^H为联合正交信道矩阵Q的共轭转置矩阵，δ²为加载因子，I为列数与Q^H列数相同的单位矩阵。Construct the matrix

Among them, Q ^H is the conjugate transpose matrix of the joint orthogonal channel matrix Q, δ ² is the loading factor, and I is the identity matrix with the same number of columns as Q ^H.

S805. Obtain a joint interference suppression matrix based on the construction matrix.

为对构造矩阵A进行QR分解得到的正交矩阵，将

进行纵向拆分为

和

其中，

的行数和列数分别与Q^H的行数和列数相同，

的行数和列数分别与δI的行数和列数相同。联合干扰矩阵G，

The construction matrix A is subjected to QR decomposition,

For the orthogonal matrix obtained by QR decomposition of the construction matrix A, the

Split vertically into

and

in,

The number of rows and columns of is the same as the number of rows and columns of Q ^H , respectively,

The number of rows and columns are the same as those of δI, respectively. Joint interference matrix G,

S806. Obtain the interference suppression matrix of the target terminal according to the joint interference suppression matrix.

得到第k个目标终端的干扰抑制矩阵

The joint interference matrix is expressed in the form G=[G ₁ ,...,G _k ,...,G _K ] corresponding to each target terminal, and then QR decomposition is performed on G _k ,

Obtain the interference suppression matrix of the kth target terminal

S807. Multiply the interference suppression matrix of the target terminal and the downlink channel coefficient matrix to obtain an equivalent channel matrix of the target terminal.

Among them, the equivalent channel matrix of the kth target terminal is:

S808. Perform SVD on the equivalent channel matrix of the target terminal to obtain a subspace data stream channel gain matrix and a data stream transmission matrix.

其中，V_k ^H为V_k的共轭转置矩阵，V_k为第k个目标终端的数据流传输矩阵，Λ_k为第k个目标终端的子空间数据流信道增益矩阵，

其中λ_k,j是第j个奇异值，表示对等效信道矩阵做SVD分解后，第j个子信道的增益。SVD decomposition for the equivalent channel matrix of the kth terminal:

Among them, V _k ^H is the conjugate transpose matrix of V _k , V _k is the data stream transmission matrix of the k th target terminal, Λ _k is the subspace data stream channel gain matrix of the k th target terminal,

where λ _k,j is the jth singular value, which represents the gain of the jth sub-channel after the equivalent channel matrix is decomposed by SVD.

S809. According to the subspace data stream channel gain matrix of the target terminal, from the number of data streams to be selected, the corresponding number of data streams with the largest total throughput is selected as the number of target data streams.

The number of data streams to be selected is a value smaller than the number of antennas of the target terminal.

In this embodiment of the present invention, the number of data streams with the largest data transmission throughput is selected from the number of data streams to be selected as the number of target data streams. Among them, the target data stream number J _k of the k-th target terminal is determined through the following iterative process:

(1) Set the initial value of a to 0;

和公式

计算第k个目标终端，j_k＝a时对应的总吞吐量T_k(a)；(2) According to the formula

and formula

Calculate the kth target terminal, the corresponding total throughput T _k (a) when j _k =a;

where r _k,j is the normalized transmission code rate corresponding to the MCS level selected by the jth subchannel of the kth target terminal, ε _k,j is the MCS level selected by the jth subchannel of the kth target terminal The corresponding BLER. r _k,j and ε _k,j are determined by γ _k,j , and the normalized code rate and BLER of all sub-channels are the same;

(3) b=a+1;

和公式

计算第k个目标终端，j_k＝b时对应的总吞吐量T_k(b)；(4) According to the formula

and formula

Calculate the kth target terminal, the corresponding total throughput T _k (b) when j _k =b;

(5) Determine whether T _k (b) is greater than or equal to T _k (a), if so, go to (6), if not, go to (7);

(6) Determine whether b is less than

设置a＝b，T_k(a)＝T_k(b)，b＝b+1，并转(4)进行循环，其中，

为第k个目标终端上的天线数；if

Set a=b, _Tk (a)= _Tk (b), b=b+1, and go to (4) to cycle, wherein,

is the number of antennas on the kth target terminal;

则此时，

则输出J_k＝b，结束，即此时，目标数据流数＝b；if b is not less than

Then at this time,

Then output J _k =b, end, that is, at this time, the number of target data streams = b;

(7) Output J _k =a, end, that is, at this time, the number of target data streams = a.

S810. Determine a power distribution scheme between target streams of the target terminal according to the number of target data streams.

确定在j_k为J_k时，第j条目标数据流对应的功率

第k个目标终端的目标流间功率分配矩阵记为

其中，此处的J_k为目标数据流数，Σ_k的主对角线元素为

其他元素为0。The power allocation scheme between target streams includes the number of target data streams of the target terminal and the power corresponding to each target data stream. For the kth target terminal, according to the formula

Determine the power corresponding to the jth target data stream when _jk is _Jk

The power allocation matrix between the target streams of the kth target terminal is denoted as

Among them, J _k here is the number of target data streams, and the main diagonal element of Σ _k is

Other elements are 0.

S811. Determine the transmit power allocated to the target terminal according to the total transmit power of the base station and the equal rule of transmit power of each data stream.

Among them, the total number of data streams is first determined based on the power allocation rules between target streams of all target terminals, where the total number of data streams is:

P_BS为基站的总发送功率。Determine the average power of the data stream according to the total transmit power of the base station and the total number of data streams, where,

_PBS is the total transmit power of the base station.

Determine the transmit power allocated to the target terminal according to the average power of the data stream and the number of target data streams of the target terminal. For the kth target terminal, the transmit power allocated to it

S812. Determine a precoding matrix of the target terminal based on the interference suppression matrix of the target terminal, the data stream transmission matrix, the power allocation scheme between target streams, and the transmit power allocated to the target terminal.

其中，ρ_k为第k个目标终端的功率分配因子，

后续通信过程中，基站可以基于W_k对发送给第k个目标终端的数据进行编码。For the kth target terminal, its precoding is

Among them, ρ _k is the power allocation factor of the k-th target terminal,

In the subsequent communication process, the base station may encode the data sent to the k th target terminal based on W _k .

于是基站下行发送的预编码矩阵

这样，基站可以基于

对发送给各目标终端的数据进行编码。Combine the precoding matrices of all target terminals W=[W ₁ ,...,W _k ,...,W _K ], considering the power constraint normalization factor on the base station side

So the precoding matrix sent by the base station downlink

In this way, the base station can be based on

The data sent to each target terminal is encoded.

The transmission control method provided by the embodiment of the present invention obtains the subspace data stream channel gain matrix corresponding to the equivalent channel matrix by performing singular value decomposition SVD on the equivalent channel matrix of the target terminal, and the target terminal is a terminal currently served by the base station. , according to the subspace data stream channel gain matrix and the preset total throughput maximization principle to determine the target terminal power allocation scheme between target streams, the target inter-stream power allocation scheme includes the number of target data streams and the power corresponding to each target data stream, the target The number of data streams is the number of streams of data streams mapped by one codeword. In some implementation processes, since the inter-stream power allocation scheme is determined based on the equivalent channel matrix of the target terminal, the determined inter-stream power allocation can be The scheme matches the actual channel conditions between the base station and the terminal, thereby improving the communication quality, and the inter-stream power allocation scheme of the target terminal is determined based on the principle of maximizing the total throughput, so that the base station can be based on the determined inter-stream power allocation scheme. When transmitting data to the terminal, the corresponding total throughput is the largest.

Embodiment four:

An embodiment of the present invention further provides a base station, as shown in FIG. 9 , including: a processor 901 and a memory 902; the processor 901 is configured to execute one or more computer programs stored in the memory 902 to implement the embodiment 1. At least one step of the transmission control method described in Embodiment 2 and Embodiment 3. It should be understood that the processor 901 is connected to the memory 902 .

Embodiments of the present invention also provide a storage medium comprising volatile or volatile memory devices implemented in any method or technology for storage of information, such as computer readable instructions, data structures, computer program modules or other data. Non-volatile, removable or non-removable media. Computer-readable storage media include but are not limited to RAM (RandomAccess Memory, random access memory), ROM (Read-Only Memory, read only memory), EEPROM (Electrically Erasable Programmable read only memory, electrified Erasable Programmable read only memory) , Flash memory or other memory technology, CD-ROM (Compact Disc Read-Only Memory), Digital Versatile Disc (DVD) or other optical disk storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or Any other medium that can be used to store the desired information and that can be accessed by a computer.

The storage medium stores one or more computer programs, and the one or more computer programs can be executed by one or more processors to implement the transmission control methods described in Embodiment 1, Embodiment 2, and Embodiment 3 at least one step.

In the base station and storage medium provided by the embodiments of the present invention, by performing singular value decomposition SVD on the equivalent channel matrix of the target terminal, the subspace data stream channel gain matrix corresponding to the equivalent channel matrix is obtained, and the target terminal is a certain current service of the base station. The terminal determines the target inter-stream power allocation scheme of the target terminal according to the subspace data stream channel gain matrix and the preset inter-stream power allocation rule. The target inter-stream power allocation scheme includes the number of target data streams and the power corresponding to each target data stream. The number of data streams is the number of streams of data streams mapped by one codeword. In some implementation processes, since the inter-stream power allocation scheme is determined based on the equivalent channel matrix of the target terminal, the determined inter-stream power allocation can be The scheme matches the actual channel conditions between the base station and the terminal, so as to improve the communication quality, and the inter-flow power allocation scheme of the target terminal is determined based on the preset inter-flow power allocation rules, so that the determined inter-flow power allocation scheme can satisfy the Other preset requirements to further improve the communication quality.

It can be seen that those skilled in the art should understand that all or some of the steps in the methods disclosed above, the functional modules/units in the system, and the device can be implemented as software (which can be implemented by computer program codes executable by a computing device). ), firmware, hardware, and their appropriate combination. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical components Components execute cooperatively. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit .

In addition, communication media typically embodies computer readable instructions, data structures, computer program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and can include any information delivery, as is well known to those of ordinary skill in the art medium. Therefore, the present invention is not limited to any particular combination of hardware and software.

The above content is a further detailed description of the embodiments of the present invention in combination with specific embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (15)

1. A transmission control method, comprising:

performing Singular Value Decomposition (SVD) on an equivalent channel matrix of a target terminal to obtain a subspace data stream channel gain matrix corresponding to the equivalent channel matrix, wherein the target terminal is a certain terminal currently served by a base station;

and determining a target inter-stream power distribution scheme of the target terminal according to the subspace data stream channel gain matrix and a preset inter-stream power distribution rule, wherein the target inter-stream power distribution scheme comprises a target data stream number and power corresponding to each target data stream, and the target data stream number is the stream number of a data stream mapped by one code word.

2. The transmission control method according to claim 1, wherein before performing SVD on the equivalent channel matrix of the target terminal, the method further comprises:

acquiring a downlink channel coefficient matrix of the target terminal;

determining an interference suppression matrix of the target terminal based on the downlink channel coefficient matrix;

and multiplying the interference suppression matrix of the target terminal by the downlink channel coefficient matrix to obtain the equivalent channel matrix of the target terminal.

3. The transmission control method of claim 2, wherein the determining the interference suppression matrix for the target terminal based on the downlink channel coefficient matrix comprises:

carrying out orthogonal QR decomposition on the downlink channel coefficient matrix to obtain an orthogonal channel matrix of the target terminal;

combining orthogonal channel matrixes of all target terminals currently served by the base station to obtain a combined orthogonal channel matrix;

performing matrix construction based on the combined orthogonal channel matrix and a preset noise related parameter to obtain a construction matrix, wherein the preset noise related parameter is a noise variance coefficient or a loading factor;

obtaining a joint interference suppression matrix based on the construction matrix;

and obtaining an interference suppression matrix of the target terminal according to the combined interference suppression matrix.

4. The transmission control method of claim 3, wherein performing matrix construction based on the joint orthogonal channel matrix and a preset noise-related parameter to obtain a construction matrix comprises:

performing conjugate transpose on the combined orthogonal channel matrix to obtain a first splicing matrix;

multiplying the preset noise related parameters by an identity matrix to obtain a second splicing matrix, wherein the number of columns of the second splicing matrix is the same as that of the first splicing matrix;

and longitudinally splicing the first splicing matrix and the second splicing matrix to obtain the construction matrix.

5. The transmission control method of claim 4, wherein the deriving a joint interference suppression matrix based on the construction matrix comprises:

performing QR decomposition on the constructed matrix, and longitudinally splitting the orthogonal matrix obtained by decomposition into a first matrix and a second matrix, wherein the number of rows and columns of the first matrix is the same as that of the first spliced matrix, and the number of rows and columns of the second matrix is the same as that of the second spliced matrix;

and multiplying the first matrix and the second matrix subjected to conjugate transformation, and dividing by the noise related parameter to obtain a joint interference suppression matrix.

6. The transmission control method according to claim 2, wherein the obtaining the downlink channel coefficient matrix of the target terminal includes:

determining a first downlink channel coefficient of the target terminal based on an uplink channel coefficient of the target terminal according to channel reciprocity;

determining a second downlink channel coefficient of the target terminal based on the downlink channel parameter reported by the target terminal;

and combining the first downlink channel coefficient and the second downlink channel coefficient to obtain a downlink channel coefficient matrix of the target terminal.

7. The transmission control method of claim 1, wherein after determining the target inter-stream power allocation scheme for the target terminal, further comprising:

determining a precoding matrix of the target terminal based on the interference suppression matrix of the target terminal, a data stream transmission matrix, the target inter-stream power allocation scheme, and the transmission power allocated to the target terminal.

8. The transmission control method of claim 7, wherein before determining the precoding matrix for the target terminal, further comprising:

and determining the transmission power distributed to the target terminal according to the total transmission power of the base station and a preset terminal power distribution rule.

9. The transmission control method according to claim 8, wherein the terminal power allocation rule includes that the transmission power of each terminal is equal;

the determining the transmission power allocated to the target terminal according to the total transmission power of the base station and a preset terminal power allocation rule includes:

and averagely distributing the total transmission power of the base station to all the target terminals currently served by the base station.

10. The transmission control method according to claim 8, wherein the terminal allocation rule includes that the transmission power of each data stream is equal;

the determining the transmission power allocated to the target terminal according to the total transmission power of the base station and a preset terminal power allocation rule includes:

determining the total data stream number according to the target inter-stream power distribution rule of the target terminal, wherein the total data stream number is the sum of the target data stream numbers of all the target terminals;

determining the average power of the data stream according to the total sending power of the base station and the total data stream number;

and determining the transmitting power distributed to the target terminal according to the average power of the data streams and the target data stream number of the target terminal.

11. The transmission control method of claim 7, wherein the performing SVD on the equivalent channel matrix of the target terminal to obtain the channel gain matrix of the subspace data stream corresponding to the equivalent channel matrix comprises:

and performing SVD on the equivalent channel matrix of the target terminal to obtain a subspace data stream channel gain matrix and the data stream transmission matrix corresponding to the equivalent channel matrix.

12. The transmission control method according to any of claims 1-11, wherein the predetermined inter-stream power allocation rule is a data transmission total capacity maximization principle;

the determining a target inter-stream power allocation scheme of the target terminal according to the subspace data stream channel gain matrix and a preset inter-stream power allocation rule includes:

determining a target inter-stream power distribution scheme of the target terminal according to the subspace data stream channel gain matrix of the target terminal and the total data transmission capacity corresponding to the target terminal, wherein the target data stream number is the data stream number with the maximum corresponding total data transmission capacity in the data stream numbers to be selected, the data stream numbers to be selected are the data stream numbers supported by the target terminal, the total data transmission capacity corresponding to the data stream numbers to be selected is determined according to the data stream numbers to be selected and the subspace data stream channel gain matrix, and the power corresponding to the target data stream is determined according to the subspace data stream channel gain matrix and the target data stream number.

13. The transmission control method according to any of claims 1-11, wherein the predetermined inter-flow power allocation rule is a total throughput maximization principle;

the determining a target inter-stream power allocation scheme of the target terminal according to the subspace data stream channel gain matrix and a preset inter-stream power allocation rule includes:

determining a target inter-stream power allocation scheme of the target terminal according to the subspace data stream channel gain matrix of the target terminal and a total throughput corresponding to the target terminal, where the target data stream number is a data stream number with the maximum corresponding total throughput among the data streams to be selected, the data streams to be selected are data streams supported by the target terminal, the total throughput corresponding to the data streams to be selected is determined according to the data streams to be selected and the subspace data stream channel gain matrix, and the power corresponding to the target data stream is determined according to the subspace data stream channel gain matrix and the target data stream number.

14. A base station, comprising: a processor and a memory;

the processor is configured to execute one or more computer programs stored in the memory to implement the steps of the transmission control method according to any one of claims 1 to 13.

15. A storage medium, characterized in that the storage medium stores one or more computer programs executable by one or more processors to implement the steps of the transmission control method according to any one of claims 1 to 13.

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