CN110380767B - A kind of precoding matrix determination method and device - Google Patents

Abstract

The present application provides a method and apparatus for determining a precoding matrix, which can reduce the occupation of uplink control channel or uplink data channel resources. The method for determining a precoding matrix includes: a network device sends first configuration information to a user equipment, where the first configuration information indicates an antenna panel spacing or a first phase difference between antenna panels; the network device receives the user equipment according to the antenna The precoding matrix determined by the panel spacing or the first phase difference of the antenna panels indicates the PMI. In the embodiment of the present invention, the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

Description

A kind of precoding matrix determination method and device

technical field

The present application relates to the field of communication technologies, and in particular, to a method and apparatus for determining a precoding matrix.

Background technique

In a new generation of wireless access technology (New Radio, NR), a Massive Multiple Input Multiple Output (Massive Multiple Input Multiple Output, Massive MIMO) technology is introduced to improve system capacity. In Massive MIMO technology, the data to be sent by the base station can be precoded based on a codebook to reduce interference between different data streams. The base station and the user equipment (User Equipment, UE) obtain the same codebook by pre-storing or calculating, the base station sends a reference signal to the user equipment, such as a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), and the UE uses the reference signal Channel estimation is performed on the signal, and channel state information CSI, such as a precoding matrix indicator (PMI), is further determined. The UE feeds back the PMI to the base station, and the base station uses the PMI to determine a precoding matrix and precode the data to be transmitted. Under the NR system, the base station antenna can be composed of multiple antenna panels, such as a two-antenna panel or a four-antenna panel.

Due to factors such as the distance between the antenna panels, there will be a phase difference between different antenna panels, that is, there is a phase difference between the signals of different antenna panels reaching the same UE, and the phase difference can be measured by the UE and fed back to the base station, so that the base station can obtain Accurate precoding matrix. This precoding matrix determination method occupies more uplink control channel resources.

SUMMARY OF THE INVENTION

The present application provides a method and device for determining a precoding matrix, which can reduce the occupation of uplink control channel or uplink data channel resources.

In a first aspect, a method for determining a precoding matrix is provided, including:

The network device sends first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels;

The network device receives the precoding matrix indication PMI determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panels.

In the embodiment of the present invention, the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

With reference to the first aspect, in a first possible implementation manner, the phase difference of the first antenna panel is a function of the distance between the antenna panels.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panels, and the Ng matrices satisfy c _x+pP,y =β _p *c _x,y , where c _x,y is the element of the x-th row and the y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, and c _x+pP,y is The element in the (x+pP)th row and the yth column of the precoding matrix, _βp indicates the second phase difference of the antenna panel, and the second phase difference of the antenna panel is the distance between the antenna panels or the first phase difference of the antenna panel , where P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

其中，c_x,y为预编码矩阵中与第一天线面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a_p、b_p、a'_p、b'_p为β_p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1，Ng为天线面板数量。With reference to the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panel, and the Ng matrices satisfy

Among them, c _x,y is the precoding matrix corresponding to the first antenna panel before the matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

The element in row y column, β _p indicates the third phase difference of the antenna panel, the third phase difference of the antenna panel is a function of the distance between the antenna panels or the first phase difference of the antenna panel, a _p , b _p , a ' _p , b' _p are the correction values of β _p , the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

Ng为天线面板数量。With reference to the first aspect, in a fourth possible implementation manner, the first configuration information indicates a first phase difference of the antenna panel

Ng is the number of antenna panels.

In combination with the fourth possible implementation manner of the first aspect, in the fifth possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

With reference to the fourth possible implementation manner of the first aspect, in the sixth possible implementation manner, the method further includes:

The network device receives the first indication information sent by the user equipment, where the first indication information indicates the first phase difference correction value δ _p of the antenna panel, wherein,

With reference to the sixth possible implementation manner of the first aspect, in the seventh possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

In combination with the fourth possible implementation manner of the first aspect, in the eighth possible implementation manner,

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

In combination with the fifth or eighth possible implementation manner of the first aspect, in the ninth possible implementation manner,

in,

or,

in,

In combination with the sixth possible implementation manner of the first aspect, in the tenth possible implementation manner,

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

In combination with the seventh or tenth possible implementation manner of the first aspect, in the eleventh possible implementation manner:

in,

or,

in,

In combination with the fourth possible implementation manner of the first aspect, in the twelfth possible implementation manner,

When Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

In combination with the fourth possible implementation manner of the first aspect, in the thirteenth possible implementation manner,

When Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

In combination with the fourth possible implementation manner of the first aspect, in the fourteenth possible implementation manner,

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

In combination with the fourth possible implementation manner of the first aspect, in the fifteenth possible implementation manner,

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

In combination with the fourth possible implementation manner of the first aspect, in the sixteenth possible implementation manner,

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

In combination with the fourth possible implementation manner of the first aspect, in the seventeenth possible implementation manner,

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

In combination with any of the twelfth to seventeenth possible implementations of the first aspect, in the eighteenth possible implementation,

in,

or,

in,

In a second aspect, a method for determining a precoding matrix is provided, including:

The user equipment receives first configuration information sent by the network device, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels;

The user equipment sends a precoding matrix indication PMI determined according to the antenna panel spacing or the first phase difference of the antenna panels to the network device.

In the embodiment of the present invention, the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

With reference to the second aspect, in a first possible implementation manner, the phase difference of the first antenna panel is a function of the distance between the antenna panels.

With reference to the second aspect or the first possible implementation manner of the second aspect, in the second possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panels, and the Ng matrices satisfy c _x+pP,y =β _p *c _x,y , where c _x,y is the element of the x-th row and the y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, and c _x+pP,y is The element in the (x+pP)th row and the yth column of the precoding matrix, _βp indicates the second phase difference of the antenna panel, and the second phase difference of the antenna panel is the distance between the antenna panels or the first phase difference of the antenna panel , where P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

其中，c_x,y为预编码矩阵中与第一天线面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a_p、b_p、a'_p、b'_p为β_p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1， Ng为天线面板数量。With reference to the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panel, and the Ng matrices satisfy c _x+pP,y = a _p b _p β _p *c _x,y ,

Among them, c _{x, y} is the precoding matrix corresponding to the first antenna panel before the matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

The element in row y column, β _p indicates the third phase difference of the antenna panel, the third phase difference of the antenna panel is a function of the distance between the antenna panels or the first phase difference of the antenna panel, a _p , b _p , a ' _p , b' _p are the correction values of β _p , the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

Ng为天线面板数量。With reference to the second aspect, in a fourth possible implementation manner, the first configuration information indicates a first phase difference of the antenna panel

Ng is the number of antenna panels.

In combination with the fourth possible implementation manner of the second aspect, in the fifth possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

With reference to the fourth possible implementation manner of the second aspect, in the sixth possible implementation manner, the method further includes:

The user equipment sends first indication information to the network equipment, where the first indication information indicates the first phase difference correction value δ _p of the antenna panel, wherein,

With reference to the sixth possible implementation manner of the second aspect, in the seventh possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

In a third aspect, a network device is provided, including a transmitter and a receiver:

the transmitter, configured to send first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels;

The receiver is configured to receive the precoding matrix indication PMI determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panels.

In the embodiment of the present invention, the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

With reference to the third aspect, in a first possible implementation manner, the phase difference of the first antenna panel is a function of the distance between the antenna panels.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panel, and the Ng matrices satisfy c _x+pP,y =β _p *c _x,y , where c _x,y is the element of the x-th row and the y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, and c _x+pP,y is The element in the (x+pP)th row and the yth column of the precoding matrix, _βp indicates the second phase difference of the antenna panel, and the second phase difference of the antenna panel is the distance between the antenna panels or the first phase difference of the antenna panel , where P is the number of CSI-RS ports of an antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

其中，c_x,y为预编码矩阵中与第一天线面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a_p、b_p、a'_p、b'_p为β_p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1， Ng为天线面板数量。With reference to the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panels, and the Ng matrices satisfy c _x+pP,y =a _p b _p β _p *c _x,y ,

Among them, c _x,y is the precoding matrix corresponding to the first antenna panel before the matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

The element in row y column, β _p indicates the third phase difference of the antenna panel, the third phase difference of the antenna panel is a function of the distance between the antenna panels or the first phase difference of the antenna panel, a _p , b _p , a ' _p , b' _p are the correction values of β _p , the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

Ng为天线面板数量。With reference to the third aspect, in a fourth possible implementation manner, the first configuration information indicates a first phase difference of the antenna panel

Ng is the number of antenna panels.

In combination with the fourth possible implementation manner of the third aspect, in the fifth possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

With reference to the fourth possible implementation manner of the third aspect, in a sixth possible implementation manner, the receiver is further configured to receive first indication information sent by the user equipment, where the first indication information indicates the the first phase difference correction value δ _p of the antenna panel, wherein,

With reference to the sixth possible implementation manner of the third aspect, in the seventh possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

In a fourth aspect, a user equipment is provided, including a receiver and a transmitter:

the receiver, configured to receive first configuration information sent by the network device, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels;

The transmitter is configured to send the precoding matrix indication PMI determined according to the antenna panel spacing or the first phase difference of the antenna panels to the network device.

In the embodiment of the present invention, the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

With reference to the fourth aspect, in a first possible implementation manner, the phase difference of the first antenna panel is a function of the distance between the antenna panels.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in the second possible implementation manner, the user equipment according to claim 1 or 2, wherein the precoding matrix includes the same The Ng matrices corresponding to the antenna panel, the Ng matrices satisfy c _x+pP,y =β _p *c _x,y , where c _x,y is the matrix corresponding to the first antenna panel in the precoding matrix. The element of the xth row and the yth column, c _x+pP,y is the element of the (x+pP)th row and the yth column of the precoding matrix, β _p indicates the second phase difference of the antenna panel, the second phase of the antenna panel The difference is a function of the distance between the antenna panels or the first phase difference of the antenna panels, the P is the number of CSI-RS ports of an antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels .

其中，c_x,y为预编码矩阵中与第一天线面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p指示天线面板第三相位差，所述天线面板第三相位差是所述天线面板间距或者所述天线面板第一相位差的函数，a_p、b_p、a'_p、b'_p为β_p的修正值，所述P为一个天线面板的CSI-RS端口数，p为整数且1≤p≤Ng-1， Ng为天线面板数量。With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a third possible implementation manner, the precoding matrix includes Ng matrices corresponding to the antenna panel, and the Ng matrices satisfy c _x+pP,y =a _p b _p β _p *c _x,y ,

Among them, c _x,y is the precoding matrix corresponding to the first antenna panel before the matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

The element in row y column, β _p indicates the third phase difference of the antenna panel, the third phase difference of the antenna panel is a function of the distance between the antenna panels or the first phase difference of the antenna panel, a _p , b _p , a ' _p , b' _p are the correction values of β _p , the P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

Ng为天线面板数量。With reference to the fourth aspect, in a fourth possible implementation manner, the first configuration information indicates a first phase difference of the antenna panel

Ng is the number of antenna panels.

In combination with the fourth possible implementation manner of the fourth aspect, in the fifth possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

With reference to the fourth possible implementation manner of the fourth aspect, in a sixth possible implementation manner, the transmitter is further configured to send first indication information to the network device, where the first indication information indicates the The first phase difference correction value δ _p of the antenna panel, where,

With reference to the sixth possible implementation manner of the fourth aspect, in the seventh possible implementation manner, when Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

In the second, third and fourth aspects, for more precoding matrix forms, reference may be made to the first aspect, which will not be repeated here.

In a possible design, the above solution implemented by the user equipment may be implemented by a chip.

In a possible design, the solution implemented by the above network device may be implemented by a chip.

In a possible design, the network device provided by this application may include a module for executing the corresponding behavior of the network device in the above method design. The modules may be software and/or hardware.

In a possible design, the terminal provided by this application may include a module for executing the corresponding terminal behavior in the above method design. The modules may be software and/or hardware.

Yet another aspect of the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, which, when executed on a computer, cause the computer to perform the methods described in the above aspects.

Yet another aspect of the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods of the above aspects.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art.

1 is a schematic diagram of a possible system structure for implementing an embodiment of the present invention;

2 is a flowchart of a method for determining a precoding matrix provided by an embodiment of the present invention;

3 is a flowchart of another method for determining a precoding matrix provided by an embodiment of the present invention;

4 is a flowchart of another method for determining a precoding matrix provided by an embodiment of the present invention;

5 is a flowchart of another method for determining a precoding matrix provided by an embodiment of the present invention;

6 is a flowchart of another method for determining a precoding matrix provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed ways

The embodiments provided in the present application will be described in detail below with reference to the accompanying drawings. The network architecture and service scenarios described in the embodiments of the present invention are for the purpose of illustrating the technical solutions of the embodiments of the present invention more clearly, and do not constitute a limitation on the technical solutions provided by the embodiments of the present invention. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

FIG. 1 shows a schematic diagram of a possible system network of the present application. As shown in FIG. 1 , at least one terminal 10 communicates with a radio access network (Radio access network, RAN). The RAN includes at least one network device 20, and for the sake of clarity, only one network device and one user equipment UE are shown in the figure. The RAN is connected to a core network (core network, CN). Optionally, the CN may be coupled to one or more external networks (External Network), such as the Internet, a public switched telephone network (PSTN), and the like.

For ease of understanding, some terms involved in this application are described below.

In this application, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand their meanings. User Equipment (UE) is a terminal device with a communication function, also called a terminal, which can include a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other devices connected to a wireless modem processing equipment, etc. User equipment may be called by different names in different networks, for example: terminal, mobile station, subscriber unit, station, cellular telephone, personal digital assistant, wireless modem, wireless communication device, handheld device, laptop computer, cordless telephone, Wireless local loop station, etc. For convenience of description, it is referred to as user equipment UE for short in this application. The network device may be a base station (BS), a wireless access device in a cloud network, or a relay station, and other devices with wireless transceiver functions. A base station may also be referred to as a base station device, which is a device deployed in a radio access network to provide wireless communication functions. The name of the base station may be different in different wireless access systems. For example, in the Universal Mobile Telecommunications System (UMTS) network, the base station is called Node B (NodeB), and in the LTE network, the base station is called Node B. It is an evolved NodeB (evolved NodeB, eNB or eNodeB), which may be called a Transmitting Reception Point (TRP), a network node or a g-NodeB (g-NodeB, gNB), etc. in the future 5G system. In this application, "antenna panel" and "panel" are used interchangeably, and unless otherwise specified, the panel refers to the antenna panel.

An embodiment of the present invention provides a method for determining a precoding matrix. This method can be applied to the system shown in FIG. 1 . The following takes the base station and the user equipment implementing the method as an example for description. As shown in Figure 2, the method includes:

Step 201: The base station sends first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels.

The first configuration information may carry the distance between the antenna panels, or the first phase difference of the antenna panels. The first configuration information may also carry Ng-1 indices, each index corresponds to a phase difference, and is used to indicate the phase difference between the two antenna panels, and each index may occupy more than 2 bits.

Ng为天线面板数量。Optionally, the first phase difference of the antenna panel can be expressed as

Ng is the number of antenna panels.

The first phase difference of the antenna panels may be calculated by the base station according to the distance between the antenna panels, or may be calculated by the base station according to other parameters that may affect the phase difference of the antenna panels. The first phase difference of the antenna panels may be a function of the distance between the antenna panels, or may be a function of other parameters that affect the phase difference of the antenna panels.

The above-mentioned first configuration information may be carried through radio resource control (radio resource control, RRC) signaling; or carried through media access control (media access control, MAC) layer signaling, for example, through a MAC control element (MAC control element, MAC CE); or through physical layer signaling, for example, through downlink control information (downlink control information, DCI).

Step 202: The user equipment receives the above configuration information.

Step 203: The user equipment obtains a precoding matrix column vector according to the foregoing first configuration information.

Optionally, the user equipment may use the above configuration information to determine the column vector of the precoding matrix according to a preset rule. The base station can also determine the same precoding matrix according to the same rule.

Optionally, the above method may further include:

Step 204: The user equipment sends a precoding matrix indicator (precoding matrix indicator, PMI) to the base station.

The base station determines one matrix or vector in the precoding matrix through the PMI.

In the embodiment of the present invention, the base station indicates the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

In the present application, there may be various implementation manners for determining the precoding matrix according to the above-mentioned first configuration information, which will be further described below through various embodiments.

Implementation method one:

This embodiment provides a method for determining a precoding matrix of a wideband mode multi-antenna panel, including:

Step 301: The base station sends first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels.

The first configuration information may carry the antenna panel spacing, or the antenna panel phase difference.

The first configuration information may also carry Ng-1 indices, each index corresponds to a phase difference, and is used to indicate the phase difference between the two antenna panels, and each index may occupy more than 2 bits. By quantizing the antenna panel phase difference with more bits, the quantization accuracy can be improved.

Ng为天线面板数量。The first phase difference of the antenna panel can be expressed as

Ng is the number of antenna panels.

Step 302: The user equipment receives the above configuration information.

Step 303: The user equipment obtains the column vector of the precoding matrix according to the above-mentioned first configuration information.

Optionally, the precoding matrix includes Ng matrices corresponding to the antenna panel, c _x+pP,y =β _p *c _x,y , where c _x,y is the difference between the first and the first in the precoding matrix. The element of the x-th row and the y-th column of the matrix corresponding to the antenna panel, the Ng matrices satisfy c _{x+pP, y} is the element of the (x+pP)-th row and the y-th column in the precoding matrix, and β _p indicates the antenna panel. The second phase difference, the second phase difference of the antenna panels is a function of the distance between the antenna panels or the first phase difference of the antenna panels, the P is the number of CSI-RS ports of an antenna panel, p is an integer and 1 ≤p≤Ng-1, Ng is the number of antenna panels.

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

optional,

in,

or,

in,

的值仅仅是举例，还可以有其他的值。In this example,

The value of is only an example, and other values are possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n是预编码矩阵中极化相位因子索引；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n is the polarization phase factor index in the precoding matrix;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

当层为2时，所述宽带模式多面板预编码矩阵为

当层为3时，所述宽带模式多面板预编码矩阵为

当层为4时，所述宽带模式多面板预编码矩阵为

Optionally, when the number of layers (layers) of data to be sent is 1, the broadband mode multi-panel precoding matrix is:

When the layer is 2, the wideband mode multi-panel precoding matrix is

When the layer is 3, the wideband mode multi-panel precoding matrix is

When the layer is 4, the wideband mode multi-panel precoding matrix is

Optionally, the above method may further include:

Step 304, the user equipment feeds back the PMI to the base station.

After determining the precoding matrix according to the channel state information, the user equipment indicates the selected precoding matrix by feeding back the PMI to the base station. The above-mentioned PMI includes multiple indexes, which can uniquely identify a precoding matrix.

或

和

或

中下标(l',m')和 (l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n的值由第二预编码矩阵索引i₂确定。根据系统的层数和对应的宽带模式多面板预编码矩阵结构

(或

)和下标(l,m,n)或者(l,l',m,m',n)的值确定预编码矩阵。The PMI includes a first PMI value and a second PMI value, where the first PMI value corresponds to wideband channel state information, and the second PMI value corresponds to subband channel state information. The first PMI value corresponds to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. When the number of layers of the system is 1, the first PMI value corresponds to two first precoding matrix indices, which are the first horizontal precoding matrix index i _1,1 and the first vertical precoding matrix index i _1,2 respectively , when the number of layers is greater than 1, the first PMI value corresponds to three first precoding matrix indices, which are the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and The first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the precoding matrix is determined by the index i _1,1 of the first horizontal precoding matrix; the value of the subscript m is determined by the index i _1,2 of the first vertical precoding matrix; when the number of layers is greater than 1,

or

and

or

The difference value of the subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the value of the subscript n is determined by the second precoding matrix index i ₂ . According to the number of layers of the system and the corresponding broadband mode multi-panel precoding matrix structure

(or

) and the value of the subscript (l,m,n) or (l,l',m,m',n) determine the precoding matrix.

In the embodiment of the present invention, the base station transmits the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

Implementation method two:

This embodiment provides a method for determining a precoding matrix of a wideband mode multi-antenna panel, including:

Step 401: The base station sends first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels.

The first configuration information may carry the distance between the antenna panels, or the first phase difference of the antenna panels. The first configuration information may also carry Ng-1 indices, each index corresponds to a phase difference, and is used to indicate the phase difference between the two antenna panels, and each index may occupy more than 2 bits.

Ng为天线面板数量。The first phase difference of the antenna panel can be expressed as

Ng is the number of antenna panels.

Step 402: The user equipment receives the above configuration information.

Step 403: The user equipment feeds back first indication information to the base station, where the first indication information indicates the first phase difference correction value δ _p of the antenna panel, wherein,

Step 404: The user equipment determines the column vector of the precoding matrix according to α _k and δ _p .

Optionally, the above method may further include:

Step 405, the base station determines the column vector of the precoding matrix according to α _k and δ _p .

Optionally, the precoding matrix includes Ng matrices corresponding to the antenna panel, and the Ng matrices satisfy c _x+pP,y =θ _p β _p *c _x,y , where c _x,y is the element of the xth row and the yth column of the matrix corresponding to the first antenna panel in the precoding matrix, _cx+pP,y is the element of the (x+pP)th row and the yth column of the precoding matrix, and β _p indicates The third phase difference of the antenna panels, the third phase difference of the antenna panels is a function of the distance between the antenna panels or the first phase difference of the antenna panels, θ _p indicates the correction value of the phase difference β _p between the antenna panels, the correction value It may be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports of one antenna panel, p is an integer and 1≤p≤Ng-1, and Ng is the number of antenna panels.

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ .

optional,

in,

or,

in,

的值仅仅是举例，还可以有其他的值。In this example,

The value of is only an example, and other values are possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n是预编码矩阵中极化相位因子索引；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n is the polarization phase factor index in the precoding matrix;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

是修正值索引，δ_p的值可以由1比特指示，取值例如

或者由2比特指示，取值例如

δ _p represents the correction value of the antenna panel phase difference determined by the UE, where

is the correction value index, the value of _δp can be indicated by 1 bit, and the value is for example

Or indicated by 2 bits, with values such as

当层为2时，所述宽带模式多面板预编码矩阵为

当层为3时，所述宽带模式多面板预编码矩阵为

当层为4时，所述宽带模式多面板预编码矩阵为

Optionally, when the number of layers (layers) of data to be sent is 1, the broadband mode multi-panel precoding matrix is:

When the layer is 2, the wideband mode multi-panel precoding matrix is

When the layer is 3, the wideband mode multi-panel precoding matrix is

When the layer is 4, the wideband mode multi-panel precoding matrix is

Optionally, the above method may further include:

Step 406, the user equipment feeds back the PMI to the base station.

After determining the precoding matrix according to the channel state information, the user equipment indicates the selected precoding matrix by feeding back the PMI to the base station. The above-mentioned PMI includes multiple indexes, which can uniquely identify a precoding matrix.

Optionally, the PMI feedback manner can be multiple, for example:

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标

的值由第一相位因子预编码矩阵索引

确定；下标n的值由第二预编码矩阵索引i₂确定。根据系统的层数和对应所述宽带模式多面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。PMI feedback mode 1: the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. The first PMI value corresponds to four first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 , and the first precoding matrix index difference value The index i _1,3 and the first phase factor precoding matrix index i _1,4 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the multi-panel precoding matrix in the wideband mode is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the subscript

The value of is indexed by the first phase factor precoding matrix

Determined; the value of the subscript n is determined by the second precoding matrix index i ₂ . According to the number of layers of the system and the structure of the multi-panel precoding matrix corresponding to the wideband mode

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the precoding matrix.

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n的值由第二预编码矩阵索引i₂确定；下标

的值由第三预编码矩阵索引

确定。根据系统的层数和对应的宽带模式多面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。PMI feedback mode 2: The PMI includes a first PMI value, a second PMI value, and a third PMI value, where the first PMI value and the third PMI value correspond to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband . The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ ; the third PMI value corresponds to the third precoding matrix index i ₃ . The value of the subscript 1 of the multi-panel precoding matrix in the wideband mode is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the value of the subscript n is determined by the second precoding matrix index i ₂ ; subscript

The value of is indexed by the third precoding matrix

Sure. According to the number of layers of the system and the corresponding broadband mode multi-panel precoding matrix structure

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the precoding matrix.

In this embodiment, the base station indicates the antenna panel phase difference to the terminal, and the terminal further corrects the antenna panel phase difference, thereby improving the accuracy of the precoding matrix. When the correction value is indicated by fewer bits, the occupancy of uplink channel resources will not be increased.

Implementation three:

This embodiment provides a method for determining a subband mode two-antenna panel precoding matrix, including:

Step 501: The base station sends first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels.

The first configuration information may carry the antenna panel spacing, or the antenna panel phase difference.

The first configuration information may also carry one index, one index corresponds to one phase difference, and is used to indicate the phase difference between the two antenna panels, and one index may occupy more than two bits. By quantizing the antenna panel phase difference with more bits, the quantization accuracy can be improved.

The first phase difference of the antenna panel can be expressed as α _k =α ₁ , Ng=1.

Step 502: The user equipment receives the above configuration information.

Step 503: The user equipment obtains the column vector of the precoding matrix according to the above-mentioned first configuration information.

Optionally, the above method may further include:

Step 504, the user equipment feeds back the PMI to the base station.

In this embodiment, the specific form of the precoding matrix can be various, and only two examples are given below:

Precoding matrix example 1:

其中，c_x,y为预编码矩阵中与第一面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p是所述可配置参数的函数，用于指示天线面板间相位差，a_p、b_p、a'_p、b'_p用于指示天线面板间相位差β_p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N_g-1] 中的正整数。Optionally, the precoding matrices in the codebook include multiple matrices corresponding to the antenna panels one-to-one, and the matrices corresponding to the multiple panels have an association relationship, and the association relationship specifically includes that the Ng matrices satisfy c _{x +pP,y} =a _p b _p β _p *c _x,y and

Among them, c _{x, y} is the front of the matrix corresponding to the first panel in the precoding matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

Element in row y column, β _p is a function of the configurable parameter, used to indicate the phase difference between antenna panels, a _p , b _p , a' _p , b' _p are used to indicate the phase difference between antenna panels β _p The correction value can be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N _g -1] .

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

optional,

in,

or,

in,

a_p2，

的值仅仅是举例，还可以有其他的值。In this example,

a _p2 ,

The value of is only an example, and other values are possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n₀是预编码矩阵中极化相位因子索引；

表示宽带的相位因子，

的值可以是

p₁、 p₂是宽带的相位因子索引；

表示子带的相位因子，

的值可以是

n₁、n₂是子带的相位因子索引；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n ₀ is the polarization phase factor index in the precoding matrix;

represents the phase factor of the broadband,

The value of can be

p ₁ , p ₂ are broadband phase factor indices;

represents the phase factor of the subband,

The value of can be

n ₁ , n ₂ are the phase factor indices of the subbands;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

当层为2时，所述子带模式两天线面板预编码矩阵为

当层为3时，所述子带模式两天线面板预编码矩阵为

当层为4时，所述子带模式两天线面板预编码矩阵为

Optionally, when the number of layers (layers) of data to be sent is 1, the subband mode two-antenna panel precoding matrix is:

When the layer is 2, the sub-band mode two-antenna panel precoding matrix is

When the layer is 3, the sub-band mode two-antenna panel precoding matrix is

When the layer is 4, the sub-band mode two-antenna panel precoding matrix is

The above-mentioned PMI fed back by the UE can be implemented in various manners, for example:

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标 p＝[p₁ p₂]的值由第一相位因子预编码矩阵索引i_1,4＝[i_1,4,1 i_1,4,2]；下标n＝[n₀ n₁ n₂]的值由第二预编码矩阵索引i₂＝[i_2,0 i_2,1 i_2,2]确定。根据系统的层数和对应所述子带模式两面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。PMI feedback mode 1: the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. The first PMI value corresponds to four first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 , and the first precoding matrix index difference value The index i _1,3 and the first phase factor precoding matrix index i _1,4 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the sub-band mode two-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the value of the subscript p=[p ₁ p ₂ ] is determined by the first precoding matrix index difference value index i 1,3; Phase factor precoding matrix index i _1,4 =[i _1,4,1 i _1,4,2 ]; the value of subscript n=[n ₀ n ₁ n ₂ ] is determined by the second precoding matrix index i ₂ = [i _2,0 i _2,1 i _2,2 ] is OK. Two-panel precoding matrix structure according to the number of layers of the system and corresponding to the subband mode

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the precoding matrix.

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n＝[n₀n₁n₂]的值由第二预编码矩阵索引 i₂＝[i_2,0 i_2,1 i_2,2]确定；下标p＝[p₁p₂]的值由第三预编码矩阵索引i₃＝[i_3,1 i_3,2]确定。根据系统的层数和对应所述子带模式两面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定预编码矩阵。PMI feedback mode 2: The PMI includes a first PMI value, a second PMI value, and a third PMI value, where the first PMI value and the third PMI value correspond to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband . The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ ; the third PMI value corresponds to the third precoding matrix index i ₃ . The value of the subscript 1 of the sub-band mode two-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the value of the subscript n=[n ₀ n ₁ n ₂ ] is determined by The second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 ] is determined; the value of the subscript p=[p ₁ p ₂ ] is determined by the third precoding matrix index i ₃ =[i _{3 ,1} i _3,2 ] OK. Two-panel precoding matrix structure according to the number of layers of the system and corresponding to the subband mode

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the precoding matrix.

In the embodiment of the present invention, the base station transmits the phase difference of the antenna panel to the user equipment, which reduces the occupation of uplink channel resources.

Precoding matrix example 2:

其中，c_x,y为预编码矩阵中与第一面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p是所述可配置参数的函数，用于指示天线面板间相位差，b_p、b'_p用于指示天线面板间相位差β_p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N_g-1]中的正整数。Optionally, the precoding matrices in the codebook include multiple matrices corresponding to the antenna panels one-to-one, and the matrices corresponding to the multiple panels have an association relationship, and the association relationship specifically includes that the Ng matrices satisfy c _{x +pP,y} =b _p β _p *c _x,y and

Among them, c _{x, y} is the front of the matrix corresponding to the first panel in the precoding matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

The element in row y column, β _p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, b _p , b' _p are used to indicate the correction value of the phase difference β _p between the antenna panels, the correction value It may be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N _g -1].

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=2, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

optional,

in,

or,

in,

的值仅仅是举例，还可以有其他的值。In this example,

The value of is only an example, and other values are possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n₀是预编码矩阵中极化相位因子索引；

表示子带的相位因子，

的值可以是

n₁、n₂是子带的相位因子索引；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n ₀ is the polarization phase factor index in the precoding matrix;

represents the phase factor of the subband,

The value of can be

n ₁ , n ₂ are the phase factor indices of the subbands;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

当层为2时，所述子带模式两天线面板预编码矩阵为

当层为3时，所述子带模式两天线面板预编码矩阵为

当层为4时，所述子带模式两天线面板预编码矩阵为

Optionally, when the number of layers (layers) of data to be sent is 1, the subband mode two-antenna panel precoding matrix is:

When the layer is 2, the sub-band mode two-antenna panel precoding matrix is

When the layer is 3, the sub-band mode two-antenna panel precoding matrix is

When the layer is 4, the sub-band mode two-antenna panel precoding matrix is

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n＝[n₀n₁n₂]的值由第二预编码矩阵索引 i₂＝[i_2,0 i_2,1i_2,2]确定。根据系统的层数和对应所述子带模式两面板预编码矩阵结构

(或

)和下标(l,m,n)或者(l,l',m,m',n)的值确定预编码矩阵。In this embodiment, the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to the wideband CSI, and the second PMI value corresponds to the subband CSI. The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the sub-band mode two-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the value of the subscript n=[n ₀ n ₁ n ₂ ] is determined by The second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 ] is determined. Two-panel precoding matrix structure according to the number of layers of the system and corresponding to the subband mode

(or

) and the value of the subscript (l,m,n) or (l,l',m,m',n) determine the precoding matrix.

In this embodiment, the base station indicates the antenna panel phase difference to the terminal, and the terminal further corrects the antenna panel phase difference on the subband granularity, thereby improving the accuracy of the precoding matrix. When the correction value is indicated by fewer bits, the occupancy of uplink channel resources in subband mode will not be increased

Implementation four:

This embodiment provides a method for determining a subband mode four-antenna panel precoding matrix, including:

Step 601: The base station sends first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels.

The first configuration information may carry the antenna panel spacing, or the antenna panel phase difference.

The first configuration information may carry the distance between the antenna panels, or the first phase difference of the antenna panels. The first configuration information may also carry three indices, each index corresponds to a phase difference, and is used to indicate the phase difference between the two antenna panels, and each index may occupy more than 2 bits. By quantizing the antenna panel phase difference with more bits, the quantization accuracy can be improved.

The first phase difference of the antenna panel can be expressed as α _k =[α ₁ α ₂ α ₃ ].

Step 602: The user equipment receives the above configuration information.

Step 603: The user equipment obtains the column vector of the precoding matrix according to the above-mentioned first configuration information.

Optionally, the above method may further include:

Step 604, the user equipment feeds back the PMI to the base station.

In this embodiment, the specific form of the precoding matrix can be various, and only two examples are given below:

Precoding matrix example 1:

Optionally, the precoding matrices in the codebook include multiple matrices corresponding to the antenna panels one-to-one, and the matrices corresponding to the multiple panels have an association relationship, and the association relationship specifically includes that the Ng matrices satisfy c _{x +pP,y} =b _p β _p *c _x,y , where c _x,y is the element of the x-th row and the y-th column of the matrix corresponding to the first panel in the precoding matrix, and c _x+pP,y is The element in the (x+pP)th row and the yth column of the precoding matrix, β _p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, b _p is used to indicate the phase difference between the antenna panels β _p A correction value, the correction value may be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N _g -1].

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

optional,

in,

or,

in,

的值仅仅是举例，还可以有其他的值。In this example,

The value of is only an example, and other values are possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n₀是预编码矩阵中极化相位因子索引；

表示子带的面板间相位因子，

之间存在一种函数关系，例如线性关系；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n ₀ is the polarization phase factor index in the precoding matrix;

represents the inter-panel phase factor of the subband,

There is a functional relationship between them, such as a linear relationship;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是

相应的n₁和/或n₂和/或n₃是UE反馈的相位因子索引。Optional, the inter-panel phase factor of the subband

At least one of the phase factors is a fixed value, or has a pre-defined value rule, or is indicated to the UE by the TRP through high-level signaling, and the remaining phase factors need to be fed back by the UE. The value of the phase factor can be

The corresponding n ₁ and/or n ₂ and/or n ₃ are the phase factor indices fed back by the UE.

当层为2时，所述子带模式四面板预编码矩阵为

当层为3时，所述子带模式四面板预编码矩阵为

当层为4时，所述子带模式四面板预编码矩阵为

Optionally, when the layer of data to be sent is 1, the sub-band mode four-panel precoding matrix is:

When the layer is 2, the sub-band mode four-panel precoding matrix is

When the layer is 3, the sub-band mode four-panel precoding matrix is

When the layer is 4, the sub-band mode four-panel precoding matrix is

或

和

或

中下标(l',m')和(l,m) 的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n＝[n₀ n₁ n₂ n₃]的值由第二预编码矩阵索引i₂＝[i_2,0 i_2,1 i_2,2 i_2,3]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据系统的层数和对应所述子带模式四面板预编码矩阵结构

(或

)和下标(l,m,n) 或者(l,l',m,m',n)的值确定所述子带模式四面板预编码矩阵。Optionally in this embodiment, the PMI includes a first PMI value and a second PMI value, where the first PMI value corresponds to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the sub-band mode four-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the subscript n=[n ₀ n ₁ n ₂ n ₃ ] The value is determined by the second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 i _2,3 ] and high-layer signaling or a predefined value rule or a predefined fixed value. According to the number of layers of the system and the corresponding sub-band mode four-panel precoding matrix structure

(or

) and the value of the subscript (l,m,n) or (l,l',m,m',n) determine the subband mode four-panel precoding matrix.

Precoding matrix example 2:

Optionally, the precoding matrices in the codebook include multiple matrices corresponding to the antenna panels one-to-one, and the matrices corresponding to the multiple panels have an association relationship, and the association relationship specifically includes that the Ng matrices satisfy c _{x +pP,y} =a _p b _p β _p *c _x,y , where c _x,y is the element of the x-th row and the y-th column of the matrix corresponding to the first panel in the precoding matrix, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix, β _p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, a _p , b _p are used to indicate the difference between the antenna panels The corrected value of the phase difference β _p , which can be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N _g -1].

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

optional,

in,

or,

in,

的值仅仅是举例，还可以有其他的值。In this example,

The value of is only an example, and other values are possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n₀是预编码矩阵中极化相位因子索引；

表示子带的面板间相位因子，n₁、n₂、n₃是子带的相位因子索引，

之间存在一种函数关系，例如线性关系；

表示与天线面板间距相关的天线面板相位差参数；

表示UE特定的宽带的面板间相位因子，可以由UE确定并反馈给基站，a_p1、a_p2、 a_p3的值可以是

p₁、p₂是UE特定的宽带的面板间相位因子索引。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n ₀ is the polarization phase factor index in the precoding matrix;

represents the inter-panel phase factor of the sub-band, n ₁ , n ₂ , n ₃ are the phase factor indices of the sub-band,

There is a functional relationship between them, such as a linear relationship;

Represents the antenna panel phase difference parameter related to the antenna panel spacing;

The inter-panel phase factor representing the UE-specific broadband can be determined by the UE and fed back to the base station, and the values of a _p1 , a _p2 , and a _p3 can be

p ₁ , p ₂ are UE-specific broadband inter-panel phase factor indices.

中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是

相应的n₁和/或n₂和/或n₃是UE反馈的相位因子索引。Optional, the inter-panel phase factor of the subband

At least one of the phase factors is a fixed value, or has a pre-defined value rule, or is indicated to the UE by the TRP through high-level signaling, and the remaining phase factors need to be fed back by the UE. The value of the phase factor can be

The corresponding n ₁ and/or n ₂ and/or n ₃ are the phase factor indices fed back by the UE.

当层数为2时，所述子带模式四面板预编码矩阵为

当层数为3时，所述子带模式四面板预编码矩阵为

当层数为4时，所述子带模式四面板预编码矩阵为

When the number of layers of data to be sent is 1, the subband mode four-panel precoding matrix is

When the number of layers is 2, the sub-band mode four-panel precoding matrix is

When the number of layers is 3, the sub-band mode four-panel precoding matrix is

When the number of layers is 4, the sub-band mode four-panel precoding matrix is

The above-mentioned PMI fed back by the UE can be implemented in various manners, for example:

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标 p＝[p₁ p₂p₃]的值由第一相位因子预编码矩阵索引i_1,3＝[i_1,3,1 i_1,3,2 i_1,3,3]确定；下标 n＝[n₀ n₁n₂ n₃]的值由第二预编码矩阵索引i₂＝[i_2,0 i_2,1 i_2,2 i_2,3]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据系统的层数和对应所述宽带模式多面板预编码矩阵结构

(或

和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。PMI feedback mode 1: the PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. The first PMI value corresponds to four first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 , and the first precoding matrix index difference value The index i _1,3 and the first phase factor precoding matrix index i _1,4 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the sub-band mode four-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; Layer When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the value of the subscript p=[p ₁ p ₂ p ₃ ] is determined by The first phase factor precoding matrix index i _1,3 =[i _1,3,1 i _1,3,2 i _1,3,3 ] is determined; the subscript n=[n ₀ n ₁ n ₂ n ₃ ] The value is determined by the second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 i _2,3 ] and high-layer signaling or a predefined value rule or a predefined fixed value. According to the number of layers of the system and the structure of the multi-panel precoding matrix corresponding to the wideband mode

(or

and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determines the subband mode four-panel precoding matrix.

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n＝[n₀ n₁ n₂ n₃]的值由第二预编码矩阵索引i₂＝[i_2,0 i_2,1 i_2,2i_2,3] 和高层信令或预定义的取值规则或预定义的固定值共同确定；下标p＝[p₁ p₂ p₃]的值由第三预编码矩阵索引i₃＝[i_3,1i_3,2i_3,3]确定。根据系统的层数和对应所述子带模式多面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。PMI feedback mode 2: The PMI includes three values: a first PMI value, a second PMI value, and a third PMI value, where the first PMI value and the third PMI value correspond to the wideband CSI, and the second PMI value corresponds to the subband CSI. CSI corresponds. The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ ; the third PMI value corresponds to the third precoding matrix index i ₃ . The value of the subscript 1 of the sub-band mode four-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; Layer When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; the subscript n=[n ₀ n ₁ n ₂ n ₃ ] The value is determined by the second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 i _2,3 ] and high-layer signaling or a predefined value rule or a predefined fixed value; the following The value of the subscript p=[p ₁ p ₂ p ₃ ] is determined by the third precoding matrix index i ₃ =[i _3,1 i _3,2 i _3,3 ]. According to the number of layers of the system and the corresponding sub-band mode multi-panel precoding matrix structure

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the subband mode four-panel precoding matrix.

Precoding matrix example 3:

其中，c_x,y为预编码矩阵中与第一面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+pP,y为预编码矩阵中第(x+pP)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p是所述可配置参数的函数，用于指示天线面板间相位差，b_p、b'_p用于指示天线面板间相位差β_p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N_g-1]中的正整数。Optionally, the precoding matrices in the codebook include multiple matrices corresponding to the antenna panels one-to-one, and the matrices corresponding to the multiple panels have an association relationship, and the association relationship specifically includes that the Ng matrices satisfy c _{x +pP,y} =b _p β _p *c _x,y and

Among them, c _{x, y} is the front of the matrix corresponding to the first panel in the precoding matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+pP, y} is the element of the (x+pP)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

The element in row y column, β _p is a function of the configurable parameter, used to indicate the phase difference between the antenna panels, b _p , b' _p are used to indicate the correction value of the phase difference β _p between the antenna panels, the correction value It may be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N _g -1].

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

optional,

in,

or,

in,

b_n2,b_n3,b_n4,b_n5,b_n6的值仅仅是举例，还可以有其他的值。In this example,

The values of b _n2 , b _n3 , b _n4 , b _n5 , and b _n6 are only examples, and other values are also possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n₀是预编码矩阵中极化相位因子索引；

表示子带的面板间相位因子，n₁、n₂、n₃、n₄、 n₅、n₆是子带的相位因子索引，

之间存在一种函数关系，例如线性关系；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n ₀ is the polarization phase factor index in the precoding matrix;

represents the inter-panel phase factor of the sub-band, n ₁ , n ₂ , n ₃ , n ₄ , n ₅ , n ₆ are the phase factor indices of the sub-band,

There is a functional relationship between them, such as a linear relationship;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

中至少有一个相位因子是固定的值，或者有预先定义的取值规则，或者由TRP通过高层信令指示给UE，剩余的相位因子需要UE进行反馈，相位因子取值可以是

相应的n₁和/或n₂和/或n₃和/或n₄和/或n₅和/或n₆是UE反馈的相位因子索引。Optional, the inter-panel phase factor of the subband

At least one of the phase factors is a fixed value, or there is a pre-defined value rule, or it is indicated to the UE by the TRP through high-level signaling, and the remaining phase factors need to be fed back by the UE, and the value of the phase factors can be

The corresponding n ₁ and/or n ₂ and/or n ₃ and/or n ₄ and/or n ₅ and/or n ₆ are the phase factor indices fed back by the UE.

当层数为2 时，所述子带模式四面板预编码矩阵为

当层数为3时，所述子带模式四面板预编码矩阵为

当层数为4时，所述子带模式四面板预编码矩阵为

Optionally, when the number of layers of data to be sent is 1, the subband mode four-panel precoding matrix is:

When the number of layers is 2, the sub-band mode four-panel precoding matrix is

When the number of layers is 3, the sub-band mode four-panel precoding matrix is

When the number of layers is 4, the sub-band mode four-panel precoding matrix is

或

和

或

中下标(l',m')和(l,m) 的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n＝[n₀n₁n₂n₃n₄n₅n₆]的值由第二预编码矩阵索引i₂＝[i_2,0i_2,1i_2,2i_2,3i_2,4i_2,5i_2,6]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据系统的层数和对应所述子带模式四面板预编码矩阵结构

(或

)和下标(l,m,n)或者(l,l',m,m',n)的值确定所述子带模式四面板预编码矩阵。Optionally in this embodiment, the PMI includes a first PMI value and a second PMI value, where the first PMI value corresponds to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the sub-band mode four-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When the number is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; subscript n=[n ₀ n ₁ n ₂ n ₃ n ₄ The value of n ₅ n ₆ ] is determined by the second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 i _2,3 i _2,4 i _2,5 i _2,6 ] and the higher layer information It can be determined jointly by a pre-defined value rule or a pre-defined fixed value. According to the number of layers of the system and the corresponding sub-band mode four-panel precoding matrix structure

(or

) and the subscript (l,m,n) or the value of (l,l',m,m',n) determine the subband mode four-panel precoding matrix.

Precoding matrix example 4:

其中，c_x,y为预编码矩阵中与第一面板对应的矩阵的前

行的子矩阵的第x行第y列的元素，c_x+P,y为预编码矩阵中第(x+P)行第y列的元素,

为预编码矩阵中第

行第y列的元素，β_p是所述可配置参数的函数，用于指示天线面板间相位差，a_p、b_p、a'_p、b'_p用于指示天线面板间相位差β_p的修正值，该修正值可以由UE确定并反馈给基站，所述P为每块面板对应的CSI-RS端口数，p为[1,N_g-1]中的正整数。The precoding matrices in the codebook include multiple matrices that correspond one-to-one with the antenna panels, and the matrices corresponding to the multiple panels have an association relationship, and the association relationship specifically includes that the Ng matrices satisfy c _x+pP,y =a _p b _p β _p *c _x,y sum

Among them, c _{x, y} is the front of the matrix corresponding to the first panel in the precoding matrix

The element of the xth row and the yth column of the submatrix of the row, c _{x+P, y} is the element of the (x+P)th row and the yth column of the precoding matrix,

is the first in the precoding matrix

Element in row y column, β _p is a function of the configurable parameter, used to indicate the phase difference between antenna panels, a _p , b _p , a' _p , b' _p are used to indicate the phase difference between antenna panels β _p The correction value can be determined by the UE and fed back to the base station, where P is the number of CSI-RS ports corresponding to each panel, and p is a positive integer in [1, N _g -1].

Optionally, a more specific example of the column vector of the precoding matrix is given below.

When Ng=4, the column vector of the precoding matrix is:

in,

为天线面板间相位差参数，为α_k的函数，

is the phase difference parameter between the antenna panels, and is a function of α _k ,

l=0,...,N ₁ O ₁ -1,

m=0,...,N ₂ O ₂ -1,

N ₁ , N ₂ , O ₁ , O ₂ are positive integers, configured by the network side,

P _CSI-RS =2NgN ₁ N ₂ ,

optional,

或者，

in,

or,

in,

a_p2,a_p3,a_p4,a_p5,a_p6，

b_n2,b_n3,b_n4,b_n5,b_n6的值仅仅是举例，还可以有其他的值。In this example,

a _p2 ,a _p3 ,a _p4 ,a _p5 ,a _p6 ,

The values of b _n2 , b _n3 , b _n4 , b _n5 , and b _n6 are only examples, and other values are also possible.

为Hadamard乘积，所述Hadamard乘积是长度为N₁N₂的矢量

和长度为N₁N₂的矢量v_l,m对应位置上的元素相乘。in,

is the Hadamard product, which is a vector of length N ₁ N ₂

Multiply the element at the corresponding position of the vector v _l,m of length N ₁ N ₂ .

Optionally, the quantities involved in the precoding matrix may have the following physical meanings. N ₁ represents the number of CSI-RS ports in the horizontal direction of each antenna panel, and N ₂ represents the number of CSI-RS ports in the vertical direction of each antenna panel. Considering the two polarization directions of the antenna array, the number of CSI-RS ports corresponding to each antenna panel is 2N ₁ N ₂ .

表示每个天线面板一个极化方向的预编码矩阵由长度为 N₁N₂的矢量组成，其中

表示垂直方向上长度为N₂的DFT 波束矢量，其中O₁、O₂分别表示水平维度和垂直维度的过采样因子，l、m是预编码矩阵中水平维度和垂直维度波束索引；

表示两个极化方向之间的相位差，

的值可以是{1,j,-1,-j}，n₀是预编码矩阵中极化相位因子索引；

表示UE特定的宽带的面板间相位因子，该值可以由UE确定并反馈给基站，

的值可以是

p₁、p₂、 p₃、p₄、p₅、p₆是UE特定的宽带的面板间相位因子索引，可以由UE确定并反馈给基站；

表示子带的面板间相位因子，n₁、n₂、n₃、n₄、n₅、n₆是子带的相位因子索引，

之间存在一种函数关系，例如线性关系；

表示与天线面板间距相关的天线面板相位差参数。

The precoding matrix representing one polarization direction of each antenna panel consists of vectors of length N ₁ N ₂ , where

Represents a DFT beam vector with a length of N ₂ in the vertical direction, wherein O ₁ and O ₂ represent the oversampling factors of the horizontal dimension and the vertical dimension, respectively, and 1 and m are the horizontal and vertical dimensions of the precoding matrix. Dimension beam indices;

represents the phase difference between the two polarization directions,

The value of can be {1,j,-1,-j}, n ₀ is the polarization phase factor index in the precoding matrix;

represents the UE-specific broadband inter-panel phase factor, which can be determined by the UE and fed back to the base station,

The value of can be

p ₁ , p ₂ , p ₃ , p ₄ , p ₅ , and p ₆ are UE-specific broadband inter-panel phase factor indexes, which can be determined by the UE and fed back to the base station;

represents the inter-panel phase factor of the sub-band, n ₁ , n ₂ , n ₃ , n ₄ , n ₅ , n ₆ are the phase factor indices of the sub-band,

There is a functional relationship between them, such as a linear relationship;

Indicates the antenna panel phase difference parameter related to the antenna panel spacing.

相应的n₁和/或n₂和/或n₃和/或n₄和/或n₅和/或n₆是UE反馈的相位因子索引。Optionally, at least one of the inter-panel phase factors _bn1 , _bn2 , _bn3 , _bn4 , _bn5 , and _bn6 of the subbands is a fixed value, or has a predefined value rule, or is determined by The TRP is indicated to the UE through high-level signaling, and the remaining phase factor needs to be fed back by the UE. The value of the phase factor can be

The corresponding n ₁ and/or n ₂ and/or n ₃ and/or n ₄ and/or n ₅ and/or n ₆ are the phase factor indices fed back by the UE.

当层数为2时，所述子带模式四面板预编码矩阵为

当层数3时，所述子带模式四面板预编码矩阵为

当层数为4时，所述子带模式四面板预编码矩阵为

Optionally, when the number of layers of data to be sent is 1, the subband mode four-panel precoding matrix is:

When the number of layers is 2, the sub-band mode four-panel precoding matrix is

When the number of layers is 3, the sub-band mode four-panel precoding matrix is

When the number of layers is 4, the sub-band mode four-panel precoding matrix is

The above-mentioned PMI fed back by the UE can be implemented in various manners, for example:

PMI feedback method 1:

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标 p＝[p₁ p₂ p₃ p₄ p₅p₆]的值由第一相位因子预编码矩阵索引 i_1,3＝[i_1,3,1 i_1,3,2 i_1,3,3 i_1,3,4 i_1,3,5 i_1,3,6]确定；下标n＝[n₀ n₁ n₂ n₃ n₄ n₅ n₆]的值由第二预编码矩阵索引i₂＝[i_2,0 i_2,1 i_2,2 i_2,3 i_2,4i_2,5 i_2,6]和高层信令或预定义的取值规则或预定义的固定值共同确定。根据系统的层数和对应所述子带模式多面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。The PMI includes a first PMI value and a second PMI value, wherein the first PMI value corresponds to the wideband CSI, and the second PMI value corresponds to the subband CSI. The first PMI value corresponds to four first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 , and the first precoding matrix index difference value The index i _1,3 and the first phase factor precoding matrix index i _1,4 ; the second PMI value corresponds to the second precoding matrix index i ₂ . The value of the subscript 1 of the subband mode four-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When When the number of layers is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; subscript p=[p ₁ p ₂ p ₃ p ₄ p ₅ The value of p ₆ ] is indexed by the first phase factor precoding matrix i _1,3 =[i _1,3,1 i _1,3,2 i _1,3,3 i _1,3,4 i _1,3,5 i _1,3,6 ] is determined; the value of the subscript n=[n ₀ n ₁ n ₂ n ₃ n ₄ n ₅ n ₆ ] is determined by the second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 i _2,3 i _2,4 i _2,5 i _2,6 ] is determined jointly with high-layer signaling or a predefined value rule or a predefined fixed value. According to the number of layers of the system and the corresponding sub-band mode multi-panel precoding matrix structure

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the subband mode four-panel precoding matrix.

PMI feedback method 2:

或

和

或

中下标(l',m')和(l,m)的差异值由第一预编码矩阵索引差异值索引i_1,3确定；下标n＝[n₀ n₁ n₂ n₃ n₄ n₅ n₆]的值由第二预编码矩阵索引i₂＝[i_2,0 i_2,1 i_2,2 i_2,3 i_2,4i_2,5 i_2,6]和高层信令或预定义的取值规则或预定义的固定值共同确定；下标p＝[p₁ p₂ p₃p₄ p₅ p₆]的值由第三预编码矩阵索引i₃＝[i_3,1 i_3,2 i_3,3 i_3,4 i_3,5 i_3,6]确定。根据系统的层数和对应所述宽带模式多面板预编码矩阵结构

(或

)和下标(l,m,n,p)或者(l,l',m,m',n,p)的值确定所述子带模式四面板预编码矩阵。The PMI includes a first PMI value, a second PMI value and a third PMI value, wherein the first PMI value and the third PMI value correspond to the CSI of the wideband, and the second PMI value corresponds to the CSI of the subband. The first PMI value corresponds to three first precoding matrix indices, which are respectively the first horizontal precoding matrix index i _1,1 , the first vertical precoding matrix index i _1,2 and the first precoding matrix index difference value index i _1,3 ; the second PMI value corresponds to the second precoding matrix index i ₂ ; the third PMI value corresponds to the third precoding matrix index i ₃ . The value of the subscript 1 of the subband mode four-panel precoding matrix is determined by the first horizontal precoding matrix index i _1,1 ; the value of the subscript m is determined by the first vertical precoding matrix index i _1,2 ; When When the number of layers is greater than 1,

or

and

or

The difference value of the middle subscripts (l',m') and (l,m) is determined by the first precoding matrix index difference value index i _1,3 ; subscript n=[n ₀ n ₁ n ₂ n ₃ n ₄ The value of n ₅ n ₆ ] is determined by the second precoding matrix index i ₂ =[i _2,0 i _2,1 i _2,2 i _2,3 i _2,4 i _2,5 i _2,6 ] and the higher layer information Let or a predefined value rule or a predefined fixed value jointly determined; the value of the subscript p=[p ₁ p ₂ p ₃ p ₄ p ₅ p ₆ ] is determined by the third precoding matrix index i ₃ =[i _{3 ,1} i _3,2 i _3,3 i _3,4 i _3,5 i _3,6 ] is determined. According to the number of layers of the system and the structure of the multi-panel precoding matrix corresponding to the wideband mode

(or

) and the value of the subscript (l,m,n,p) or (l,l',m,m',n,p) determine the subband mode four-panel precoding matrix.

The embodiments of the present invention further provide device embodiments for implementing the steps and methods in the above method embodiments. The methods, steps, technical details, and technical effects of the foregoing method embodiments are also applicable to the apparatus embodiments, and will not be described in detail subsequently.

FIG. 7 shows a schematic structural diagram of a network device, and the network device can be applied to the system shown in FIG. 1 . The network device 20 includes one or more remote radio units (remote radio units, RRU) 701 and one or more baseband units (baseband units, BBU) 702 . The RRU 701 may be called a transceiver unit, a transceiver, a transceiver circuit or a transceiver, etc., and it may include at least one antenna 7011 and a radio frequency unit 7012 . The RRU 701 is mainly used for sending and receiving radio frequency signals and converting radio frequency signals to baseband signals, for example, for sending the signaling instructions or reference signals in the above embodiments to the terminal. The BBU702 part is mainly used for baseband processing and control of network equipment. The RRU 701 and the BBU 702 may be physically set together or physically separated, that is, a distributed base station.

BBU702 is the control center of network equipment, also called processing unit, mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spread spectrum and so on. In an example, the BBU 702 may be composed of one or more boards, and the multiple boards may jointly support a wireless access network (such as a 5G network) of a single access standard, or may respectively support wireless access of different access standards network. The BBU 702 also includes a memory 7021 and a processor 7022. The memory 7021 is used to store necessary instructions and data. The processor 7022 is used to control the network device to perform necessary actions. Memory 7021 and processor 7022 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits are also provided on each single board.

The foregoing network device may be used to implement the methods of the foregoing method embodiments, specifically:

The transmitter is configured to send first configuration information to the user equipment, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels.

A receiver, configured to receive the precoding matrix indication PMI determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panels.

Optionally, the receiver is further configured to receive first indication information fed back by the user equipment, where the first indication information indicates a first phase difference correction value of the antenna panel.

Optionally, the processor is configured to determine a precoding matrix according to the foregoing first configuration information.

Optionally, the processor is further configured to determine one matrix or vector in the precoding matrix according to the foregoing PMI.

For the specific form of the precoding matrix, the PMI feedback manner, etc., reference may be made to the foregoing method embodiments, which will not be repeated here.

FIG. 8 provides a schematic structural diagram of a terminal. The terminal is applicable to the system shown in FIG. 1 . For convenience of explanation, FIG. 8 only shows the main components of the terminal. As shown in FIG. 8 , the terminal 10 includes a processor, a memory, a control circuit or an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, control the entire terminal, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data, for example, to store the codebook described in the above embodiments. The control circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. The control circuit together with the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. An input and output device, such as a touch screen, a display screen or a keyboard, is mainly used to receive data input by the user and output data to the user.

When the terminal is powered on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the terminal, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for the convenience of description, FIG. 8 only shows one memory and a processor. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present invention.

As an optional implementation, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data, and the central processing unit is mainly used to control the entire terminal and execute software. Programs that process data from software programs. The processor in FIG. 8 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors, interconnected by technologies such as a bus. Those skilled in the art can understand that a terminal may include multiple baseband processors to adapt to different network standards, a terminal may include multiple central processors to enhance its processing capability, and various components of the terminal may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, in this embodiment of the invention, an antenna and a control circuit with a transceiver function can be regarded as the transceiver unit 801 of the terminal 10 , and a processor with a processing function can be regarded as the processing unit 802 of the terminal 10 . As shown in FIG. 8 , the terminal 10 includes a transceiver unit 801 and a processing unit 802. The transceiving unit may also be referred to as a transceiver, a transceiver or a transceiving device or the like. Optionally, the device used for implementing the receiving function in the transceiver unit 801 may be regarded as a receiving unit, and the device used for implementing the sending function in the transceiver unit 801 may be regarded as a transmitting unit, that is, the transceiver unit 801 includes an example of a receiving unit and a transmitting unit. Attributes, the receiving unit may also be called a receiver, a receiver or a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter or a transmitting circuit, and the like.

The foregoing terminal may be used to implement the methods in the foregoing method embodiments, specifically:

a receiver, configured to receive first configuration information sent by the network device, where the first configuration information indicates the distance between the antenna panels or the first phase difference between the antenna panels;

A transmitter, configured to send a precoding matrix indication PMI determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panels to the network device.

Optionally, the transmitter is further configured to send first indication information to the network device, where the first indication information indicates a first phase difference correction value of the antenna panel.

In this embodiment, the user equipment determines a precoding matrix according to the foregoing first configuration information, and determines a PMI to indicate a matrix or vector in the precoding matrix.

For the specific form of the precoding matrix, the PMI feedback manner, etc., reference may be made to the foregoing method embodiments, which will not be repeated here.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Claims (48)

1. A method of determining a precoding matrix, comprising:

the method comprises the steps that network equipment sends first configuration information to user equipment, wherein the first configuration information indicates an antenna panel interval or an antenna panel first phase difference;

the network equipment receives a Precoding Matrix Indicator (PMI) determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panel;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝β_p*c_x,yWherein c is_x,yFor the elements of the x-th row and y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix, beta_pAnd indicating a second phase difference of the antenna panels, wherein the second phase difference of the antenna panels is a function of the distance between the antenna panels or the first phase difference of the antenna panels, P is the number of CSI-RS ports of one antenna panel, P is an integer, and is more than or equal to 1 and less than or equal to Ng-1, and Ng is the number of the antenna panels.

2. The method of claim 1, wherein the antenna panel first phase difference is a function of the antenna panel spacing.

3. The method of claim 1, wherein the first configuration information indicates the antenna panel first phase difference

Ng is the number of antenna panels.

4. The method of claim 3, wherein when Ng is 2, the column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

5. The method of claim 3, further comprising:

the network equipment receives first indication information sent by the user equipment, wherein the first indication information indicates a first phase difference correction value delta of the antenna panel_pWherein

6. the method of claim 5, wherein when Ng is 2, the column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

7. a method of determining a precoding matrix, comprising:

the method comprises the steps that network equipment sends first configuration information to user equipment, wherein the first configuration information indicates an antenna panel interval or an antenna panel first phase difference;

the network equipment receives a Precoding Matrix Indicator (PMI) determined by the user equipment according to the antenna panel spacing or the first phase difference of the antenna panel;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝a_pb_pβ_p*c_x,y，

Wherein, c_x,yFor the front of the matrix corresponding to the first antenna panel in the precoding matrix

Element of the x-th row and y-th column of the submatrix of rows, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix,

is the first in the precoding matrix

Element of row y column, beta_pIndicating a third phase difference of the antenna panel as a function of the antenna panel spacing or the antenna panel first phase difference, a_p、b_p、a'_p、b'_pIs beta_pThe correction value of (1) is that P is the number of CSI-RS ports of one antenna panel, P is an integer and is not less than 1 and not more than Ng-1, and Ng is the number of the antenna panels.

8. The method of claim 7, wherein the antenna panel first phase difference is a function of the antenna panel spacing.

9. The method of claim 7, wherein the first configuration information indicates the antenna panel first phase difference

Ng is the number of antenna panels.

10. The method of claim 9, wherein when Ng is 2, the column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panelsNumber of α_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

11. The method of claim 9, further comprising:

the network equipment receives first indication information sent by the user equipment, wherein the first indication information indicates a first phase difference correction value delta of the antenna panel_pWherein

12. the method of claim 11, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

13. a method of determining a precoding matrix, comprising:

the method comprises the steps that user equipment receives first configuration information sent by network equipment, wherein the first configuration information indicates an antenna panel interval or an antenna panel first phase difference;

the user equipment sends a Precoding Matrix Indicator (PMI) determined according to the antenna panel spacing or the first phase difference of the antenna panels to the network equipment;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝β_p*c_x,yWherein c is_x,yFor the elements of the x-th row and y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix, beta_pIndicating a second phase difference of an antenna panel, the antenna panel second phaseThe phase difference is a function of the antenna panel spacing or the antenna panel first phase difference, P is the number of CSI-RS ports of one antenna panel, P is an integer and is greater than or equal to 1 and less than or equal to Ng-1, and Ng is the number of antenna panels.

14. The method of claim 13, wherein the antenna panel first phase difference is a function of the antenna panel spacing.

15. The method of claim 13, wherein the first configuration information indicates a first phase difference for the antenna panel

Ng is the number of antenna panels.

16. The method of claim 15, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a dayThe phase difference parameter between the line panels is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

17. The method of claim 15, further comprising:

the user equipment sends first indication information to the network equipment, wherein the first indication information indicates the first phase difference correction value delta of the antenna panel_pWherein

18. the method of claim 17, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

19. a method of determining a precoding matrix, comprising:

the method comprises the steps that user equipment receives first configuration information sent by network equipment, wherein the first configuration information indicates an antenna panel interval or an antenna panel first phase difference;

the user equipment sends a Precoding Matrix Indicator (PMI) determined according to the antenna panel spacing or the first phase difference of the antenna panels to the network equipment;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝a_pb_pβ_p*c_x,y，

Wherein, c_x,yFor the first antenna panel in the precoding matrixFront of the corresponding matrix

Element of the x-th row and y-th column of the submatrix of rows, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix,

is the first in the precoding matrix

Element of row y column, beta_pIndicating a third phase difference of the antenna panel as a function of the antenna panel spacing or the antenna panel first phase difference, a_p、b_p、a'_p、b'_pIs beta_pThe correction value of (1) is that P is the number of CSI-RS ports of one antenna panel, P is an integer and is not less than 1 and not more than Ng-1, and Ng is the number of the antenna panels.

20. The method of claim 19, wherein the antenna panel first phase difference is a function of the antenna panel spacing.

21. The method of claim 19, wherein the first configuration information indicates the antenna panel first phase difference

22. The method of claim 21, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

23. The method of claim 21, further comprising:

the user equipment sends first indication information to the network equipment, wherein the first indication information indicates the first phase difference correction value delta of the antenna panel_pWherein

24. the method of claim 23, wherein when Ng is 2, the column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

25. a network device, comprising a transmitter and a receiver:

the transmitter is configured to transmit first configuration information to user equipment, where the first configuration information indicates an antenna panel spacing or an antenna panel first phase difference;

the receiver is configured to receive a precoding matrix indicator PMI determined by the user equipment according to the antenna panel spacing or the first antenna panel phase difference;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝β_p*c_x,yWherein c is_x,yFor the elements of the x-th row and y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix, beta_pAnd indicating a second phase difference of the antenna panels, wherein the second phase difference of the antenna panels is a function of the distance between the antenna panels or the first phase difference of the antenna panels, P is the number of CSI-RS ports of one antenna panel, P is an integer, and is more than or equal to 1 and less than or equal to Ng-1, and Ng is the number of the antenna panels.

26. The network device of claim 25, wherein the antenna panel first phase difference is a function of the antenna panel spacing.

27. The network device of claim 25, wherein the first configuration information indicates a first phase difference for the antenna panel

Ng is the number of antenna panels.

28. The network device of claim 27, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

29. The network device of claim 27, wherein:

the receiver is further configured to receive first indication information sent by the ue, where the first indication information refers toA first phase difference correction value delta for the antenna panel_pWherein

30. the network device of claim 29, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

31. a network device, comprising a transmitter and a receiver:

the transmitter is configured to transmit first configuration information to user equipment, where the first configuration information indicates an antenna panel spacing or an antenna panel first phase difference;

the receiver is configured to receive a precoding matrix indicator PMI determined by the user equipment according to the antenna panel spacing or the first antenna panel phase difference;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝a_pb_pβ_p*c_x,y，

Wherein, c_x,yFor the front of the matrix corresponding to the first antenna panel in the precoding matrix

Element of the x-th row and y-th column of the submatrix of rows, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix,

is the first in the precoding matrix

Element of row y column, beta_pIndicating a third phase difference of the antenna panel as a function of the antenna panel spacing or the antenna panel first phase difference, a_p、b_p、a'_p、b'_pIs beta_pThe correction value of (1) is that P is the number of CSI-RS ports of one antenna panel, P is an integer and is not less than 1 and not more than Ng-1, and Ng is the number of the antenna panels.

32. The network device of claim 31, wherein the antenna panel first phase difference is a function of the antenna panel spacing.

33. The network device of claim 31, wherein the first configuration information indicates the antenna panel first phase difference

34. The network device of claim 33, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

35. The network device of claim 33, wherein:

the receiver is further configured to receive first indication information sent by the user equipment, where the first indication information indicates the antenna panel first phase difference correction value δ_pWherein

36. the network device of claim 35, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

37. a user equipment, comprising a receiver and a transmitter:

the receiver is configured to receive first configuration information sent by a network device, where the first configuration information indicates an antenna panel interval or an antenna panel first phase difference;

the transmitter is configured to transmit a precoding matrix indicator PMI determined according to the antenna panel spacing or the first antenna panel phase difference to the network device;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝β_p*c_x,yWherein c is_x,yFor the elements of the x-th row and y-th column of the matrix corresponding to the first antenna panel in the precoding matrix, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix, beta_pAnd indicating a second phase difference of the antenna panels, wherein the second phase difference of the antenna panels is a function of the distance between the antenna panels or the first phase difference of the antenna panels, P is the number of CSI-RS ports of one antenna panel, P is an integer, and is more than or equal to 1 and less than or equal to Ng-1, and Ng is the number of the antenna panels.

38. The user equipment of claim 37 wherein the antenna panel first phase difference is a function of the antenna panel spacing.

39. The UE of claim 37, wherein the first configuration information indicates a first phase difference of the antenna panels

Ng is the number of antenna panels.

40. The UE of claim 39, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

41. The user equipment of claim 39, wherein:

the transmitter is further configured to transmit first indication information to the network device, where the first indication information indicates the antenna panel first phase difference correction value δ_pWherein

42. the UE of claim 41, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

43. a user equipment, comprising a receiver and a transmitter:

the receiver is configured to receive first configuration information sent by a network device, where the first configuration information indicates an antenna panel interval or an antenna panel first phase difference;

the transmitter is configured to transmit a precoding matrix indicator PMI determined according to the antenna panel spacing or the first antenna panel phase difference to the network device;

wherein the precoding matrix includes Ng matrices corresponding to the antenna panel, the Ng matrices satisfying c_x+pP,y＝a_pb_pβ_p*c_x,y，

Wherein, c_x,yFor the front of the matrix corresponding to the first antenna panel in the precoding matrix

Element of the x-th row and y-th column of the submatrix of rows, c_x+pP,yIs the element of the y column of the (x + pP) th row in the precoding matrix,

is the first in the precoding matrix

Element of row y column, beta_pIndicating a third phase difference of the antenna panel as a function of the antenna panel spacing or the antenna panel first phase difference, a_p、b_p、a'_p、b'_pIs beta_pThe correction value of (1) is that P is the number of CSI-RS ports of one antenna panel, P is an integer and is not less than 1 and not more than Ng-1, and Ng is the number of the antenna panels.

44. The user equipment of claim 43 wherein the antenna panel first phase difference is a function of the antenna panel spacing.

45. The UE of claim 43, wherein the first configuration information indicates a first phase difference of the antenna panels

46. The UE of claim 45, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂，

is a Hadamard product, said Hadamard product being of length N₁N₂Vector of (2)

And a length of N₁N₂Vector v of_l,mThe elements at the corresponding positions are multiplied.

47. The user equipment of claim 45, wherein:

the transmitter is further configured to transmit first indication information to the network device, where the first indication information indicates the antenna panel first phase difference correction value δ_pWherein

48. the UE of claim 47, wherein when Ng is 2, a column vector of the precoding matrix is:

wherein,

is a phase difference parameter between antenna panels, is alpha_kAs a function of (a) or (b),

l＝0,...,N₁O₁-1，

m＝0,...,N₂O₂-1，

N₁，N₂，O₁，O₂is a positive integer and is configured by the network side,

P_CSI-RS＝2NgN₁N₂。

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