WO2020227941A1

WO2020227941A1 - Method and apparatus for reporting channel state information, and related device

Info

Publication number: WO2020227941A1
Application number: PCT/CN2019/086909
Authority: WO
Inventors: 李雪茹; 曲秉玉; 刘鹍鹏
Original assignee: 华为技术有限公司
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-11-19

Abstract

A method and apparatus for reporting channel state information, and a related device. The method comprises: a first communication apparatus receiving configuration information from a second communication apparatus, wherein the configuration information is used for instructing the first communication apparatus to report CSI; and the first communication apparatus reporting the CSI. The CSI comprises first indication information and second indication information; the second indication information is used for indicating a matrix; and the first indication information is used for indicating a matrix, or the first indication information is used for indicating a matrix and a matrix. By using the present application, the overheads of the first communication apparatus feeding back the CSI can be reduced; and the second communication apparatus can acquire, on the basis of the CSI sent by the first communication apparatus, a channel matrix H^(r), so as to support non-linear precoding and channel information prediction.

Description

Method, device and related equipment for reporting channel state information

Technical field

This application relates to the field of communication technology, and in particular to methods, devices and related equipment for reporting channel state information.

Background technique

At present, multiple input and multiple output (MIMO) technology is widely used in communication systems, such as Long Term Evolution (LTE) systems. MIMO technology refers to the use of multiple transmitting antennas and receiving antennas at the transmitting end and the receiving end, so that signals are sent and received through multiple antennas at the transmitting end and the receiving end. MIMO technology can improve communication quality and system channel capacity.

The MIMO system can use precoding (Precoding) technology to improve signal transmission quality and rate. Specifically, the network equipment determines the precoding matrix required for downlink data transmission according to the channel state information (CSI) fed back by the terminal equipment, and then The network device uses the precoding matrix to send downlink data to the terminal device. Aiming at the linear precoding method defined in LTE standard version 14 (Rel-14) and New Radio Access Technology (New RadioAccess Technology, NR), in an existing technical solution for terminal equipment to feed back CSI to network equipment, the terminal equipment The feedback CSI includes at least one parameter of the rank indicator (Rank Index, RI) of the channel matrix, the precoding matrix index (PMI), and the channel quality indicator (Channel Quality Index, CQI), wherein the PMI includes PMI1 and PMI2 , PMI1 is used to indicate the matrix W ₁ , and PMI2 is used to indicate the matrix W ₂ , and the product of W ₁ and W ₂ represents the precoding matrix W recommended by the terminal device. Non-linear precoding methods such as Dirty Paper Coding (DPC) and Iterative Precoding (Iterative Precoding) are superior to linear precoding in terms of improving communication quality. In order to support the above-mentioned non-linear precoding, network equipment needs to obtain its connection with the terminal Channel matrix H for device communication. In addition, in terms of channel information prediction, the prediction accuracy of the channel matrix H is better than the prediction accuracy of its eigenvector V. In order to achieve high-precision channel information prediction on the network device side, the network device also needs to obtain the channel matrix H for communication with the terminal device. . However, in the existing technical solution for terminal equipment to feed back CSI to the network equipment, the network equipment can only obtain the precoding matrix W recommended by the terminal equipment, which generally does not directly reflect the channel matrix H itself, so the network equipment cannot be based on the PMI To obtain the channel matrix H.

In summary, the existing technical solutions for terminal equipment to feed back CSI to network equipment cannot support high-performance nonlinear precoding such as dirty paper coding, iterative precoding, and channel information prediction based on the channel matrix H.

Summary of the invention

The embodiments of the present application provide a method, an apparatus, and related equipment for reporting channel state information, which can reduce the overhead of the first communication device to feed back CSI, and the second communication device can obtain the channel matrix H ^(r) based on the CSI sent by the first communication device, To support non-linear precoding and channel information prediction.

In a first aspect, a method for reporting CSI is provided, including: a second communication device sends configuration information to a first communication device, the configuration information is used to configure the CSI reported by the first communication device, and then the first communication device reports the CSI.

The configuration information is used to indicate the configuration parameters of the CSI. For example, the configuration parameters include one or more of the following information: CSI report parameters, frequency domain granularity of the reported parameters, codebook type used, and reference on which CSI measurement is based Signal information, CSI report bandwidth information, etc. The frequency domain granularity of the reported parameters can be broadband reporting or subband reporting or other forms. The codebook type used may include the first type Type I codebook or the second type Type II codebook. The foregoing configuration information may be sent by the second communication device to the first communication device through high-level signaling, and the high-level signaling carries the configuration information. Exemplarily, the high-level signaling may be radio resource control (Radio Resource Control, RRC) signaling.

The CSI is used to indicate the matrix H ^(r) , the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the first communication device, and the matrix H ^(r) is a matrix with N _t rows and N _sb columns. N _sb is the number of frequency domain units included in the report bandwidth of the CSI, N _t is a positive integer, r ∈ {1,2,...,N _r }, and N _r is the number of antenna ports of the first communication device. Among them, the frequency domain unit may be a sub-carrier, a resource block (Resource Block, RB), a sub-band (Sub Band), etc., which are not limited in the embodiment of the present application.

Wherein, CSI includes first indication information and second indication information.

Among them, the second indication information is used to indicate the matrix

matrix

It is a matrix with 2L rows and P columns, L is a positive integer, and 2L is less than N _t .

Among them, the first indication information is used to indicate the matrix

Is a matrix with N _t rows and 2L columns, and P is N _sb , or the first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

It is a matrix with N _sb rows and K columns, K is a positive integer, K is less than N _sb , and P is K.

Optionally, for different antenna ports r,

The values can be the same; or, the N _r antenna ports are grouped according to a certain principle, and the antenna ports in each group

The values are the same. Through this solution, the reporting overhead of the first indication information can be reduced.

Optionally, for different antenna ports r,

In this technical solution, through

or

with

The channel matrix H ^(r) containing N _t N _sb elements is compressed into a matrix containing 2LP elements

The number of elements that need to be fed back is reduced, thereby reducing the overhead of feeding back CSI. In addition, the first communication device sends the CSI including the first indication information and the second indication information to the second communication device, and the second communication device may determine the channel matrix H ^(r) based on the first indication information and the second indication information to Support non-linear precoding, and better channel information prediction.

Optional,

The form is: L bases are arranged in the following order into a diagonal block matrix,

The L bases may be derived from a set of predefined bases. Optionally, the predefined bases are Discrete Fourier Transformation (DFT) bases. The first communication device can report

To report the index of each base in

Optional,

The form is: K bases are constructed as follows

K bases can be derived from a set of predefined bases, optionally, the predefined bases are DFT bases. The first communication device can report

To report the index of each base in

In an implementation manner, the second indication information includes third indication information and fourth indication information, and the third indication information is used to indicate the three-dimensional matrix

It is a three-dimensional matrix of M ₁ page with L rows and P columns, M ₁ is a positive integer less than 2N _r ;

The fourth indication information is used to indicate the matrix

It is a matrix of 2N _r rows M ₁ column, or, the fourth indication information is used to indicate the matrix

It is a matrix of 2N _r rows M ₁ column.

Optionally, the fourth indication information is used to indicate the matrix

When the value of l is different,

Is the same matrix, through this scheme can reduce feedback

s expenses. Optionally, the fourth indication information is used to indicate the matrix

In the case of different values of k,

Is the same matrix, through this scheme can reduce feedback

s expenses. at this time,

or

Can be represented by W _Rx,1 .

Among them, the matrix

or

The column vector in is the compressed base, 2N _r is the dimension of the compressed base, and M ₁ is the number of compressed bases.

Optionally, the fourth indication information indication matrix

or

Elements in the matrix

or

The compressed base in is not predefined, but calculated by the first communication device and reported to the second communication device. Compared with pre-defined base, non-pre-defined base

or

It can match the channel to be compressed more flexibly.

In this technical solution, first, when the first communication device is a mobile terminal, because the scattering environment around the mobile terminal is more complicated, the channel angle on the antenna port side of the first communication device is expanded greatly, resulting in the use of the DFT substrate as a compressed matrix pair. Corresponding to the multiple antenna ports r of the first communication device

When compressing, the compression rate is very low, that is, it is difficult to accurately represent the corresponding multiple antenna ports r through less DFT base

However, the non-predefined base can be better matched. For example, the non-predefined base can be determined according to the feature vector, which corresponds to the multi-antenna port r

The feature vector of the determined feature space. The feature vector can better match the corresponding multiple antenna ports r of the first communication device

Therefore, the compression effect is better, that is, the technical solution can be accurately represented by less compression base

Secondly, the DFT predefined base is only applicable to the channel matrix compression of multiple antenna ports with the same polarization direction. In the scenario where the antenna port of the first communication device or the second communication device has multiple polarization directions, it needs to be based on different The polarization direction splits the channel matrix and compresses them with the DFT predefined base. A non-predefined base is more flexible and can be calculated according to the correlation between antenna port channel matrices of different polarization directions to support joint compression of antenna port channel matrices of different polarization directions and improve the compression effect.

Again, through

or

Contains 2L×P×N _r (that is, 2L rows, P columns, N _r pages) elements

Compressed into a three-dimensional matrix containing L×P×M ₁ (that is, L rows, P columns, and M ₁ pages) elements

The number of elements that need to be fed back is reduced, and the overhead of feeding back CSI is reduced.

Optionally, the first communication device may construct W _Rx,1 as follows: the first communication device receives the reference signal and performs measurement to obtain

with

Both are matrices of size L×P (that is, L rows and P columns),

with

Is a coefficient matrix determined according to the channels between the two polarization direction antenna ports of the second communication device and the rth antenna port of the first communication device. Then the first communication device divides 2N _r two-dimensional matrices

Spliced into a three-dimensional matrix of L×P×2N _r (that is, L rows, P columns and 2N _r pages)

And the three-dimensional matrix

Expand into a two-dimensional matrix with a scale of 2N _r ×PL (that is, 2N _r rows and PL columns)

First communication device order

Complex matrix of this size, and

Covariance matrix

Perform eigen decomposition, and the eigenvectors corresponding to the largest M ₁ eigenvalues form a compressed matrix

Optionally, the first communication device may also quantize the eigenvectors corresponding to the largest M ₁ eigenvalues to form a compression matrix

In this technical solution, the three-dimensional matrix

generate

or

Or, W _Rx,1 can be generated in other ways, which is not limited in the embodiment of the present application. For example, the first communication device may use the first correlation and the second correlation to generate

or

The first correlation is the correlation between the channels of the multiple antenna ports of the first communication device, and the second correlation is the correlation between the channels of the antenna ports of the two polarization directions of the second communication device.

Among them, 2N _r matrices

To three-dimensional matrix

The mapping between the pages can be given by the function g(r,i), namely

And for any (r′,i′)≠(r″,i″), g(r′,i′)≠g(r″,i″);

Means taking matrix

Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

Optionally, g(r,1)=r, g(r,2)=r+N _r , that is to say, the same polarization direction antenna port group of the second communication device is combined with the multiple antenna ports of the first communication device Put the channels together;

Optionally, g(r,1)=2×(r-1)+1, g(r,2)=2×(r-1)+2, that is, the first communication device is the same antenna port Put the channel between the two polarization direction antenna port groups of the second communication device together.

On the above base

or

In the definition mode, the channel matrix

The relationship with the third instruction information and the fourth instruction information is:

here

It is the lossy channel information after compression.

If the fourth indication information is used to indicate the matrix

Then said

Get, or if the fourth indication information is used to indicate the matrix

Then said

get;

Representation matrix

After two front fixing index one-dimensional vector of length M ₁ of the one-dimensional vector length M ₁ of the m-th element is

Representation matrix

Two front fixing the index length of a 2N _{r-dimensional} vector, and the one-dimensional vector of length 2N _r g (r, i) th element

× is a one-dimensional vector

As a matrix multiplication of column vectors.

In this technical solution, the matrix

Compressed as a complex matrix as a whole, a matrix containing 2L×P×N _r elements

Compressed into a matrix containing only ₁ element of L×P×M

Significantly reduce the overhead of CSI reporting without significant performance loss.

In one implementation, the matrix

Magnitude matrix

Said

The elements in row l and column k are based on the

The value determined by the amplitude of the element in the lth row and kth column, for example, the

The element in row l and column k is the

The magnitude or square of the magnitude of the element in the lth row and kth column;

Among them, g(r,i)∈{1,2,…,2N _r }, r∈{1,2,…,N _r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said

Is a three-dimensional matrix of 2N _r pages with L rows and P columns,

Means taking matrix

Fix the third index of a two-dimensional matrix with L rows and P columns with an index of g(r, i), and the elements in the l row and k column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix

Then said

Or if the fourth indication information is used to indicate the matrix

Then said

get;

Means taking matrix

Fix the first two one-dimensional vectors with index length M ₁ , and the m-th element in the one-dimensional vector with length M ₁ is

Means taking matrix

Fix the first two one-dimensional vectors with an index length of 2N _r , and the g(r, i)th element of the one-dimensional vector with length 2N _r is

× is a one-dimensional vector

As a matrix multiplication of column vectors.

In this technical solution, through the matrix

Magnitude matrix

For compression, the amplitude matrix containing 2L×P×N _r elements

Compressed into a matrix containing only ₁ element of L×P×M

In the matrix

Among them, the amplitude is affected by the spatial transmission distance of the channel, the scattering environment, etc. Since the distances between the multiple antenna ports of the first communication device and the multiple antenna ports of the second communication device are relatively close, the amplitude matrix

With strong correlation, the present invention can greatly reduce the CSI reporting overhead without causing significant performance loss.

In an implementation manner, the second indication information further includes fifth indication information, and the fifth indication information is used to indicate the

The phase of the element.

In this technical solution, when the scattering environment between the first communication device and the second communication device is more complicated, such as the non-line of sight (NLoS) scattering environment, the matrix

The phase correlation is weak, right

The phase of the elements in the middle is not compressed, that is, the matrix is directly reported

The phase of the middle element can ensure the feedback accuracy.

Optionally, the fifth indication information is used to indicate the

The phase of elements in the middle, including:

The fifth indication information includes sixth indication information and seventh indication information, and the sixth indication information is used to indicate a three-dimensional matrix

Is a three-dimensional matrix with L rows and P columns and M ₂ pages, where M ₂ is a positive integer less than 2N _r ;

The seventh indication information is used to indicate the matrix

Is a matrix of 2N _r rows M ₂ columns, or the seventh indication information is used to indicate the matrix

Is a matrix of 2N _r rows and M ₂ columns;

The matrix

Phase matrix

Said

The elements in row l and column k are based on the

The value determined by the phase of the element in the lth row and kth column, for example, the

The element in row l and column k is the

The phase or the square of the phase of the element in the lth row and kth column;

Among them, f(r,i)∈{1,2,…,2N _r }, r∈{1,2,…,N _r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), f(r′,i′)≠f(r″,i″);

Said

Is a three-dimensional matrix of 2N _r pages with L rows and P columns,

Means taking matrix

Fix the third two-dimensional matrix with L rows and P columns whose index is f(r,i), and the element in row l and column k in the two-dimensional matrix with L rows and P columns is

If the seventh indication information is used to indicate the matrix

Then said

Or if the seventh indication information is used to indicate the matrix

Then said

Means taking matrix

Fix the first two one-dimensional vectors with index length M ₂ , and the m-th element in the one-dimensional vector with length M ₂ is

Means taking matrix

Fix the first two one-dimensional vectors with an index length of 2N _r , and the f(r, i)th element of the one-dimensional vector with length 2N _r is

× is a one-dimensional vector

As a matrix multiplication of column vectors.

In this technical solution, through the matrix

Phase matrix

For compression, the phase matrix containing 2L×P×N _r elements

Compressed into a matrix containing only L×P×M ₂ elements

When the scattering environment between the first communication device and the second communication device is relatively simple, such as the Line of Sight (LoS) scattering environment, the matrix

The phase correlation is strong, and the matrix

Phase matrix

Compressed reporting can greatly reduce the overhead of CSI reporting without causing significant performance loss.

In an implementation manner, the first indication information is used to indicate matrix

In the case of, for any r′,r″∈{1,2,…,N _r }, l′,l″∈{1,2,…,2L}, if r′≠r” and

Then l′=l″; or

The first indication information is used to indicate the matrix

And matrix

Then l′=l″, for any r′, r″∈{1,2,…,N _r }, k′,k″∈{1,2,…,K}, if r′≠r” and

Then k′=k″.

In this technical solution, the matrix

Each column vector of is the basis for compressing matrix H ^(r′) , and the matrix

Each column vector of is the basis for compression of matrix H ^(r″) , matrix

Each column vector and matrix of

Each column vector of can be derived from the same set of predefined DFT basis, if the matrix

And matrix

The same DFT basis is selected, namely

Then the DFT base is in the matrix

And matrix

In the same position, that is, l′=l″, so that the matrix H ^(r′) and matrix H ^{(r″) are} compressed

And matrix

The l′=l”th row corresponds to the same base; similarly, the matrix

And matrix

The constraints make the matrix

And matrix

The same column as possible corresponds to the same base. The above for the matrix

And matrix

The constraint can improve the vector

Correlation between, thereby enhancing the compression effect.

In an implementation manner, the third indication information includes instructions for indicating

Middle element

X ¹ _l,k,g bits of X ¹ _l,k,g are positive integers, if the fourth indication information is used to indicate the matrix

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Y ¹ _l,c,d bits of Y ¹ _l,c,d , the Y ¹ _l,c,d are positive integers, or if the fourth indication information is used to indicate

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Z ¹ _{k, c, d} bits, Z ¹ _{k, c, d} are positive integers.

Optionally, if the fourth indication information is used to indicate a matrix

Then Y ¹ _{l,c,d is} greater than or equal to X ¹ _l,k,g . Optionally, if the fourth indication information is used to indicate a matrix

Then Z ¹ _{k,c,d is} greater than or equal to X ¹ _l,k,g .

In this technical solution, since the matrix indicated by the fourth indication information

or

For the matrix

A compressed base matrix, a three-dimensional matrix indicated by the third indication information

For the matrix

For the compressed merging coefficient matrix, in the case of selecting the same number of compressed bases M ₁ , the quantization accuracy of the elements of the compressed base is not lower than the accuracy of the merging coefficients, which is beneficial to reduce the compression loss, that is, the compressed channel matrix more matches the real Channel matrix. when

That is, the base matrix is the same when the value of l is different, or when

That is, when the base matrix is the same when the value of k is different, it is more necessary to improve the quantization accuracy of the compressed base element. From another perspective, when the compression loss is constant, improving the quantization accuracy of compressed base elements is beneficial to reduce the number of selected compressed bases M ₁ , and is beneficial to reduce the overhead of reporting CSI.

In an implementation manner, the sixth indication information includes instructions for indicating

Middle element

X ² _l,k,f bits of X ² _l,k,f are positive integers, if the seventh indication information is used to indicate the matrix

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Y ² _l,c,d bits of Y ² _l,c,d , Y ² _l,c,d are positive integers, or, if the seventh indication information is used to indicate the matrix

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Z ² _k,c,d bits, Z ² _k,c,d are positive integers.

Optionally, if the seventh indication information is used to indicate a matrix

Then Y ² _{l,c,d is} greater than or equal to X ² _l,k,f . Optionally, if the seventh indication information is used to indicate a matrix

Then Z ² _{k,c,d is} greater than or equal to X ² _l,k,f .

In this technical solution, since the matrix indicated by the seventh indication information

or

For the matrix

A compressed base matrix, a three-dimensional matrix indicated by the sixth indication information

For the matrix

For the compressed merging coefficient matrix, in the case of selecting the same number of compressed substrates M ₂ , the quantization accuracy of the elements of the compressed substrate is not lower than the accuracy of the merging coefficients, which is beneficial to reduce the compression loss, that is, the compressed channel matrix more matches the real Channel matrix. when

That is, the base matrix is the same when the value of l is different, or when

That is, when the base matrix is the same when the value of k is different, it is more necessary to improve the quantization accuracy of the compressed base element. From another perspective, when the compression loss is constant, improving the quantization accuracy of compressed base elements is beneficial to reduce the number of selected compressed bases M ₂ , and is beneficial to reduce the cost of reporting CSI.

Optionally, the first communication device responds to the matrix

Magnitude matrix

And phase matrix

Compressed separately, at this time, used for the amplitude matrix

Compressed matrix

or

And for the phase matrix

Compressed matrix

or

It can be different and is calculated independently.

In this technical solution, the matrix

Magnitude matrix

Has strong correlation, phase matrix

The correlation is often weaker than the magnitude matrix

So the magnitude matrix

Comparative phase matrix

Often easy to compress. Amplitude matrix

The compression rate is determined by M ₁ , the phase matrix

The compression rate is determined by M ₂ , and the matrix can be realized by setting different M ₁ and M ₂

Different compression ratios of amplitude and phase, preferably, M _{1 is} smaller than M ₂ .

In an implementation manner, the reporting of CSI by the first communication device includes:

The first communication device reports the third indication information and the fourth indication information at the same time; or

The first communication device reports the third indication information and the fourth indication information at different times.

In this technical solution, when the channel time domain changes rapidly, the first communication device separately calculates the compression matrix for the channel H ^(r) at each moment

or

Compression matrix calculated by the first communication device

or

It is used exclusively for the channel H ^(r) at this moment. In this case, the first communication device simultaneously reports the third and fourth indication information; when the channel time domain changes slowly, the compression calculated by the first communication device matrix

or

Shared by channel H ^(r) at multiple times to reduce the compression matrix

or

In this case, the first communication device reports the third indication information and the fourth indication information at different times.

The first communication device reports the sixth indication information and the seventh indication information at the same time; or

The first communication device reports the sixth indication information and the seventh indication information at different times.

or

Compression matrix calculated by the first communication device

or

It is used exclusively for the channel H ^(r) at this moment. In this case, the first communication device reports the sixth indication information and the seventh indication information at the same time; when the channel time domain changes slowly, the compression calculated by the first communication device matrix

or

Shared by channel H ^(r) at multiple times to reduce the compression matrix

or

In this case, the first communication device reports the sixth indication information and the seventh indication information at different times.

In an implementation manner, the reporting of the third indication information is an aperiodic report, and the reporting of the fourth indication information is a periodic report.

In this technical solution, in the case that the first communication device reports the third indication information and the fourth indication information at different times, the first communication device may periodically report the compression matrix

or

The size of the cycle determines that the second communication device obtains the compression matrix

or

Real-time, the first communication device can report the three-dimensional matrix acyclically

The reporting may be triggered by the first communication device or the second communication device.

In an implementation manner, the report of the sixth indication information is an aperiodic report, and the report of the seventh indication information is a periodic report.

In this technical solution, in the case that the first communication device reports the sixth indication information and the seventh indication information at different times, the first communication device may periodically report the compression matrix

or

In one implementation, the M ₁ may be configured, or the network device through the downlink control information or a RRC control signaling medium access control layer (MediaAccess ControlControl Element, MACCE) ( Downlink Control Information, DCI) letter Let the value of M _{1 be} configured.

In an implementation manner, the M ₂ is configurable, and the network device configures the value of M ₂ through RRC or MACCE or DCI signaling.

In a second aspect, an embodiment of the present application provides a communication device, which includes a unit for implementing the method for reporting CSI in the first aspect.

In the third aspect, an embodiment of the present application provides a computer storage medium, wherein the computer storage medium stores a computer program or instruction, and when the program or instruction is executed by a processor, the processor executes The method for reporting CSI as described in the first aspect.

In a fourth aspect, an embodiment of the present application provides a terminal device, including a receiver and a transmitter, the receiver is coupled with the transmitter, and is characterized in that:

The receiver is configured to receive configuration information from a second communication device, where the configuration information is used to configure the CSI reported by the transmitter;

The transmitter is used to report CSI, the CSI is used to indicate a matrix H ^(r) , the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the terminal device, and the matrix H ^{(r )} Is a matrix of N _t rows and N _sb columns, N _sb is the number of frequency domain units included in the reported bandwidth of the CSI, N _t is a positive integer, r∈{1,2,...,N _r }, N _r is The number of antenna ports of the terminal device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix

The matrix

It is a matrix with 2L rows and P columns, L is a positive integer, and 2L is less than N _t ;

The first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

In a fifth aspect, an embodiment of the present application provides a network device, including a receiver and a transmitter, the receiver is coupled with the transmitter, and is characterized in that:

The transmitter is configured to send configuration information to a first communication device, where the configuration information is used to configure the CSI reported by the first communication device;

The receiver is configured to receive CSI, the CSI is used to indicate a matrix H ^(r) , the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the first communication device, and the matrix H ^(r) is a matrix with N _t rows and N _sb columns, N _sb is the number of frequency domain units included in the reported bandwidth of the CSI, N _t is a positive integer, r∈{1,2,...,N _r }, N _r is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix

The matrix

The first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

In a sixth aspect, an embodiment of the present application provides a chip system, wherein the chip system includes a processor and an interface circuit, and the interface circuit is coupled with the processor,

The processor is configured to execute computer programs or instructions to implement the method according to the first aspect;

The interface circuit is used to communicate with other modules outside the chip system.

Description of the drawings

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present invention;

2 is a schematic flowchart of a method for reporting CSI according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a matrix compression provided by an embodiment of the present invention;

4 is a schematic structural diagram of another communication system provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a network device provided by an embodiment of the present invention.

Detailed ways

The embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention.

In order to better understand the method, device and related equipment for reporting channel state information disclosed in the embodiments of the present application, the following first describes the communication system implemented in the present application. Please refer to FIG. 1, which is a schematic structural diagram of a communication system disclosed in an embodiment of the present application. The communication system may include at least one first communication device and at least one second communication device, where the first communication device and the second communication device The communication device establishes a communication connection.

Compared with the existing technical solution for terminal equipment to feed back CSI to network equipment, the network equipment can only obtain the eigenvector V of the channel matrix H, but cannot obtain the channel matrix H, and then cannot support high-performance non-conformity such as dirty paper coding and iterative precoding. linear pre-coding and channel information prediction based on the channel matrix H, in particular: a terminal device fed back CSI comprises RI, PMI and CQI channel matrix, wherein the PMI includes PMI1 and the PMI2, PMI1 for all elements indicating matrix W ₁ of, PMI2 is used to indicate all the elements in the matrix W _2, W ₁ and W ₂ product characterization eigenvector of the channel matrix H V.

In the embodiment of the present application, the first communication device receives configuration information from the second communication device, and the configuration information is used to configure the CSI reported by the first communication device. Then, the first communication device may report the CSI, and the CSI includes the first indication information and the second indication information.

Among them, CSI is used to indicate the matrix H ^(r) , and the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the first communication device, r ∈ {1,2,...,N _r }, N _r is the first The number of antenna ports of the communication device. The matrix H ^(r) is a matrix with N _t rows and N _sb columns. For example, the matrix H ^(r) may be a complex matrix with N _t rows and N _sb columns.

Among them, N _sb is the number of frequency domain units included in the CSI report bandwidth. N _t is the number of antenna ports of the second communication device.

For example, if the first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

Is a matrix with N _sb rows and K columns, L is a positive integer, 2L is less than N _t , K is a positive integer, and K is less than N _sb , then the second indication information is used to indicate the matrix

The matrix

Is a matrix of 2L rows and K columns,

among them,

The L bases can be derived from a set of predefined bases. The first communication device can report

To report the index of each base in

among them,

The form is: K bases are constructed as follows

The K bases can be derived from a set of predefined bases. The first communication device can report

To report the index of each base in

In this example, through

with

The channel matrix H ^(r) containing N _t N _sb elements is compressed into a matrix containing 2LK elements

For another example, if the first indication information is used to indicate the matrix

Is a matrix with N _t rows and 2L columns, L is a positive integer, 2L is less than N _t , then the second indication information is used to indicate the matrix

matrix

Is a matrix with 2L rows and N _sb columns,

In this example, through

The channel matrix H ^(r) containing N _t N _sb elements is compressed into a matrix containing 2LN _sb elements

The technical solutions of the embodiments of the present invention can be applied to various communication systems, such as: Global System of Mobile Communication (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, fifth-generation mobile communication technology (4th- Generation, 4G) communication system, 4G New Radio (NR) communication system, NR, URLLC, NB-IoT or eMTC system, etc.

The second communication device may be a network device, and the network device may specifically be an access point (AP) in a wireless local area network (Wireless Local Area Networks, WLAN), a global system for mobile communication (GSM) or Base Station Transceiver Station (BTS) in Code Division Multiple Access (Code Division Multiple Access, CDMA), Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), LTE The evolutionary base station (Evolutional Node B, eNB), relay station or access point, in-vehicle equipment, wearable equipment, access network equipment in the future 4G network, and the public land mobile network (Public Land Mobile Network, PLMN) any of the access network equipment, etc.

The first communication device may be a terminal device, which may also be called User Equipment (UE), mobile station, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, terminal , Wireless communication equipment, user agent or user device, etc., which can specifically be Station (ST), cellular phone, cordless phone, Session Initiation Protocol (SIP) phone, wireless local loop (Wireless local loop) in WLAN Local Loop (WLL) station, Personal Digital Assistant (PDA), handheld devices with wireless communication functions, computing devices, other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and future 4G networks Any of mobile stations and terminal equipment in the future evolved PLMN network.

Based on the schematic structural diagram of the communication system shown in FIG. 1, please refer to FIG. 2. FIG. 2 is a schematic flowchart of a method for reporting CSI according to an embodiment of the present invention. Specifically, as shown in FIG. 2, the method for reporting CSI in the embodiment of the present invention may include the following steps:

201. The second communication device sends configuration information to the first communication device, where the configuration information is used to configure the CSI reported by the first communication device.

202. The first communication device acquires CSI. The CSI includes first indication information and second indication information, and the first indication information is used to indicate the matrix

And matrix

The second indication information is used to indicate the matrix

The first communication device can transfer the matrix

Compress as a complex matrix as a whole, or compress the matrix

To compress the amplitude matrix, or the matrix

To compress the phase matrix of

The magnitude matrix and the matrix

To compress the phase matrix, or report the matrix directly

The phase matrix of

The phase matrix is compressed.

First, the matrix

In the case of compressing as a whole complex matrix, the second indication information may include third indication information and fourth indication information. The third indication information is used to indicate the three-dimensional matrix

It is a three-dimensional matrix of L×K×M ₁ (that is, L rows, K columns, M ₁ pages), and M ₁ is a positive integer. The fourth indication information is used to indicate the matrix

It is a matrix of 2N _r rows M ₁ column. Or, in the matrix

It is a matrix of 2N _r rows M ₁ column.

Among them, the three-dimensional matrix

Can also be called a three-dimensional tensor

In an implementation manner, the fourth indication information is used to indicate the matrix

When the value of l is different,

Is the same matrix, through this scheme can reduce feedback

s expenses. Or, the fourth indication information is used to indicate the matrix

In the case of different values of k,

Is the same matrix, through this scheme can reduce feedback

s expenses. at this time,

or

Can be represented by W _Rx,1 .

For example, the first communication device may construct W _Rx,1 as follows: the first communication device receives the reference signal and performs measurement to obtain

with

All are matrices of size L×K (that is, L rows and K columns),

with

Concatenated into a three-dimensional matrix of L×K×2N _r (that is, L rows and K columns and 2N _r pages)

And the three-dimensional matrix

Expand to a two-dimensional matrix with a scale of 2N _r × KL (that is, 2N _r rows and KL columns)

First communication device order

Complex matrix of this size, and

Covariance matrix

First, the first communication device can perform matrix transformation. Taking Figure 3 as an example, the first communication device can transform

Split into

2N _r matrices with a size of L×K (that is, L rows and K columns) are formed. The first communication device

Put on

Later, a newly constructed three-dimensional matrix is obtained, and the newly constructed three-dimensional matrix contains KL vectors with a length of 2N _r . The first communication device arranges these KL vectors with a length of 2N _r in any order to form a two-dimensional matrix with a scale of 2N _r rows and KL columns

Further, the first communication device may construct a compression matrix, for example, the first communication device may make

Complex matrix of this scale, right

Covariance matrix

Perform feature decomposition to get

Among them, D is a matrix with a scale of 2N _r × 2N _r (that is, 2N _r rows and 2N _r columns), and diagonal elements are eigenvalues arranged in descending order. V is a matrix with a scale of 2N _r × 2N _r (that is, 2N _r rows and 2N _r columns), and each column is an eigenvector, which corresponds to the eigenvalue in D. The first communication device can obtain the compressed matrix W _Rx,1 through W _Rx,1 =V(:,[1:M ₁ ]). Optionally, the first communication device may also quantize W _Rx,1 =V(:,[1:M ₁ ]) to form a compression matrix

In the above-mentioned construction mode of W _Rx,1 , the third indication information and the fourth indication information indicate a complex matrix

by

get.

among them,

Is a two-dimensional matrix with L rows and K columns, by the formula

get,

Is a two-dimensional matrix with L rows and K columns, by the formula

get.

Said

Is a one-dimensional vector of length 2N _r , by the formula

get,

Means taking matrix

× is a one-dimensional vector

As a matrix multiplication of column vectors.

In one implementation, in order to further reduce the overhead of the feedback compression matrix W _Rx,1 , the channel sharing compression matrix W _Rx1 at T _s times, where

In one implementation, the compressed matrix W _Rx1 and the combined coefficient matrix

There are two ways to report:

Compression matrix W _Rx,1 and merge coefficient matrix

It can be reported at the same time.

Compression matrix W _Rx,1 and merge coefficient matrix

It can be reported at different times. For example, compressed matrix W _{Rx, 1} cycle report, combined coefficient matrix

Aperiodic reporting, compressed matrix W _Rx,1 can be combined by multiple coefficient matrices

Shared.

Second, the matrix

In the case of compression of the amplitude matrix, the third indication information and the fourth indication information indicate the matrix

Magnitude matrix

Among them, the amplitude matrix

The description of and the complex matrix

The description is similar to that of the complex number matrix

The description of the embodiment of this application will not be repeated.

3. Report the matrix directly

In the case of the phase matrix, the second indication information includes fifth indication information, and the fifth indication information is used to indicate the matrix

The phase of the element.

Four, in the matrix

In the case where the phase matrix is compressed, the fifth indication information may include sixth indication information and seventh indication information. The sixth indication information is used to indicate the three-dimensional matrix

It is a three-dimensional matrix of L×K×M ₂ (that is, L rows, K columns, M ₂ pages), and M ₂ is a positive integer. The seventh indication information is used to indicate the matrix

It is a matrix of 2N _r rows and M ₂ columns.

Alternatively, the fifth indication information may include sixth indication information and seventh indication information. The sixth indication information is used to indicate the three-dimensional matrix

It is a three-dimensional matrix of L×K×M ₂ , and M ₂ is a positive integer. The seventh indication information is used to indicate the matrix

It is a matrix of 2N _r rows and M ₂ columns.

Among them, the phase matrix

The description of and the complex matrix

The description is similar to that of the complex number matrix

The description of the embodiment of this application will not be repeated.

Among them, the three-dimensional matrix

Can also be called a three-dimensional tensor

In one implementation, the matrix

And three-dimensional matrix

There are two ways to report:

matrix

And three-dimensional matrix

It can be reported at the same time.

matrix

And three-dimensional matrix

It can be reported at different times. For example, the matrix

Periodic reporting, three-dimensional matrix

Aperiodic reporting, matrix

Can be multiple 3D matrices

Shared.

In one implementation, the matrix

And three-dimensional matrix

There are two ways to report:

matrix

And three-dimensional matrix

It can be reported at the same time.

matrix

And three-dimensional matrix

It can be reported at different times. For example, the matrix

Periodic reporting, three-dimensional matrix

Aperiodic reporting, matrix

Can be multiple 3D matrices

Shared.

Five, in the separate matrix

Magnitude matrix and matrix

When the phase matrix of is compressed, the second indication information includes third indication information, fourth indication information, and fifth indication information.

Among them, the third indication information and the fourth indication information in the embodiment of this application can refer to the amplitude matrix

For specific descriptions in the case of compression, in addition, for the fifth indication information in the embodiment of this application, please refer to the comparison of the phase matrix

The specific description in the case of compression is not repeated in the embodiment of the present application.

In one implementation, the magnitude matrix

The compression rate is determined by M ₁ , the phase matrix

In an implementation manner, the first indication information is used to indicate the matrix

And matrix

Then l′=l″, for any r′, r″∈{1,2,…,Nr}, k′,k″∈{1,2,…,K}, if r′≠r” and

Then k′=k″.

In the embodiment of this application, the matrix

Each column vector of is the basis for compression of matrix H ^(r″) , matrix

Each column vector and matrix of

And matrix

The same DFT basis is selected, namely

Then the DFT base is in the matrix

And matrix

The l′=l”th row corresponds to the same base; similarly, the matrix

And matrix

The constraints make the matrix

And matrix

The constraint can improve the vector

Correlation between, thereby enhancing the compression effect.

Middle element

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Y ¹ _l,c,d bits of Y ¹ _l,c,d , Y ¹ _l,c,d are positive integers, or, if the fourth indication information is used to indicate the matrix

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Z ¹ _{k, c, d} bits, Z ¹ _{k, c, d} are positive integers.

Optionally, if the fourth indication information is used to indicate a matrix

The Y ¹ _{l,c,d is} greater than or equal to X ¹ _l,k,g . Optionally, if the fourth indication information is used to indicate a matrix

Z ¹ _{k,c,d is} greater than or equal to X ¹ _l,k,g .

In the embodiment of the present application, since the matrix indicated by the fourth indication information

or

For the matrix

That is, the base matrix is the same when the value of l is different, or when

Middle element

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Z ² _k,c,d bits, Z ² _k,c,d are positive integers.

Optionally, if the seventh indication information is used to indicate a matrix

The Y ² _{l, c, d is} greater than or equal to X ² _{l, k, f} . Optionally, if the seventh indication information is used to indicate a matrix

Z ² _{k,c,d is} greater than or equal to X ² _l,k,f .

In the embodiment of the present application, since the matrix indicated by the seventh indication information

or

For the matrix

That is, the base matrix is the same when the value of l is different, or when

203. The first communication device reports CSI.

If the first communication device directly feeds back the matrix

The amount of feedback is

among them

Is the number of bits for each parameter to be fed back. In the third instruction information and the fourth instruction information indicate the complex matrix

In the implementation method of, the compressed matrix W _Rx,1 is shared at T _s times, and the feedback amount includes two parts: the feedback amount of the fourth indication information

And the feedback amount of the third instruction information

among them

with

Is the number of bits for each parameter to be fed back.

When N _r =4, L=4, K=4,

When, the compression ratio is shown in Table 1:

Table 1

To	T _s＝1 T _s =1	T _s＝3 T _s ＝3	T _s＝5 T _s = 5	T _s＝9 T _s ＝9
M ₁＝2 M ₁ ＝2	0.34000.3400	0.27330.2733	0.25560.2556	0.25110.2511
M ₁＝3 M ₁ ＝3	0.42400.4240	0.42400.4240	0.40000.4000	0.39160.3916
M ₁＝4 M ₁ ＝4	0.60000.6000	0.45560.4556	0.43330.4333	0.42220.4222
M ₁＝4 M ₁ ＝4	0.76400.7640	0.60730.6073	0.55560.5556	0.54270.5427
M ₁＝5 M ₁ ＝5	1.04001.0400	0.74000.7400	0.70000.7000	0.67330.6733

Compression rate refers to the amount of feedback of the third and fourth indication information and the direct feedback matrix

The ratio between the amount of feedback.

In the embodiment of the present invention, through

with

The number of elements that need to be fed back is reduced, thereby reducing the overhead of feeding back CSI. Second, by adding the matrix

Compressed as a complex matrix as a whole, a matrix containing 2L×K×N _r elements

Compressed into a matrix containing only ₁ element of L×K×M

Significantly reduce the overhead of CSI reporting without significant performance loss, or by

Magnitude matrix

For compression, the amplitude matrix containing 2L×K×N _r elements

Compressed into a matrix containing only ₁ element of L×K×M

It can greatly reduce the overhead of CSI reporting without causing significant performance loss, or by comparing the matrix

Phase matrix

For compression, the phase matrix containing 2L×K×N _r elements

Compressed into a matrix containing only L×K×M ₂ elements

It can greatly reduce the CSI reporting overhead without causing significant performance loss. In addition, the first communication device sends the CSI including the first indication information and the second indication information to the second communication device, and the second communication device may determine the channel matrix H ^(r) based on the first indication information and the second indication information to Support non-linear precoding, and better channel information prediction.

Based on the schematic structural diagram of the communication system shown in FIG. 1, an embodiment of the present invention provides another method for reporting CSI. Specifically, the method for reporting CSI in the embodiment of the present invention may include the following steps:

The second communication device sends configuration information to the first communication device, where the configuration information is used to configure the CSI reported by the first communication device;

The first communication device reports CSI. The CSI includes first indication information and second indication information. The first indication information is used to indicate the matrix

The second indication information is used to indicate the matrix

The first communication device can transfer the matrix

Compress as a complex matrix as a whole, or compress the matrix

To compress the amplitude matrix, or the matrix

To compress the phase matrix of

The magnitude matrix and the matrix

To compress the phase matrix, or report the matrix directly

The phase matrix of

The phase matrix is compressed.

First, the matrix

It is a three-dimensional matrix of L×N _sb ×M ₁ , and M ₁ is a positive integer. The fourth indication information is used to indicate the matrix

It is a matrix of 2N _r rows M ₁ column. Or, in the matrix

It is a matrix of 2N _r rows M ₁ column.

Among them, the three-dimensional matrix

Can also be called a three-dimensional tensor

When the value of l is different,

Is the same matrix, through this scheme can reduce feedback

In the case of different values of k,

Is the same matrix, through this scheme can reduce feedback

s expenses. at this time,

or

Can be represented by W _Rx,1 .

with

Both are matrices of size L×N _sb (that is, L rows and N _sb columns),

with

Spliced into a three-dimensional matrix of L×N _sb × 2N _r (that is, L rows, N _sb columns and 2N _r pages)

And the three-dimensional matrix

Expand into a two-dimensional matrix with a scale of 2N _r × N _sb L (that is, 2N _r rows and N _sb L columns)

First communication device order

Complex matrix of this size, and

Covariance matrix

First, the first communication device can perform matrix transformation. For example, the first communication device can transform

Split into

2N _r matrices with a size of L×N _sb (that is, L rows and N _sb columns) are formed. The first communication device

Put on

Later, a newly constructed three-dimensional matrix is obtained, and the newly constructed three-dimensional matrix contains N _sb L vectors with a length of 2N _r . The first communication device arranges these N _sb L vectors with a length of 2N _r in any order to form a two-dimensional matrix with a scale of 2N _r rows and N _sb L columns

Complex matrix of this scale, right

Covariance matrix

Perform feature decomposition to get

by

get.

among them,

Is a two-dimensional matrix with L rows and N _sb columns, by

get,

Is a two-dimensional matrix with L rows and N _sb columns, by

get.

Said

Is a one-dimensional vector of length 2N _r , by the formula

get,

Means taking matrix

× is a one-dimensional vector

As a matrix multiplication of column vectors.

In one implementation, in order to further reduce the overhead of the feedback compression matrix W _Rx,1 , the channel sharing compression matrix W _Rx,1 at T _s times, where

There are two ways to report:

Compression matrix W _{Rx, 1} and merge coefficient matrix

It can be reported at the same time.

Compression matrix W _Rx,1 and merge coefficient matrix

Shared.

Second, the matrix

Magnitude matrix

Among them, the amplitude matrix

The description of and the complex matrix

The description is similar to that of the complex number matrix

The description of the embodiment of this application will not be repeated.

3. Report the matrix directly

The phase of the element.

Four, in the matrix

It is a three-dimensional matrix of L×N _sb ×M ₂ (ie, L rows, N _sb columns, M ₂ pages), and M ₂ is a positive integer. The seventh indication information is used to indicate the matrix

It is a matrix of 2N _r rows and M ₂ columns.

It is a three-dimensional matrix of L×N _sb ×M ₂ , and M ₂ is a positive integer. The seventh indication information is used to indicate the matrix

It is a matrix of 2N _r rows and M ₂ columns.

Among them, the three-dimensional matrix

Can also be called a three-dimensional tensor

In one implementation, the matrix

And three-dimensional matrix

There are two ways to report:

matrix

And three-dimensional matrix

It can be reported at the same time.

matrix

And three-dimensional matrix

It can be reported at different times. For example, the matrix

Periodic reporting, three-dimensional matrix

Aperiodic reporting, matrix

Can be multiple 3D matrices

Shared.

In one implementation, the matrix

And three-dimensional matrix

There are two ways to report:

matrix

And three-dimensional matrix

It can be reported at the same time.

matrix

And three-dimensional matrix

It can be reported at different times. For example, the matrix

Periodic reporting, three-dimensional matrix

Aperiodic reporting, matrix

Can be multiple 3D matrices

Shared.

Among them, the phase matrix

The description of and the complex matrix

The description is similar to that of the complex number matrix

The description of the embodiment of this application will not be repeated.

Five, in the separate matrix

Magnitude matrix and matrix

In one implementation, the magnitude matrix

The compression rate is determined by M ₁ , the phase matrix

Then l'=l".

In the embodiment of this application, the matrix

Each column vector of is the basis for compression of matrix H ^(r″) , matrix

Each column vector and matrix of

And matrix

The same DFT basis is selected, namely

Then the DFT base is in the matrix

And matrix

The l′=l″ row corresponds to the same base. The above is for the matrix

The constraint can improve the vector

Correlation between, thereby enhancing the compression effect.

Middle element

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Z ¹ _{k, c, d} bits, Z ¹ _{k, c, d} are positive integers.

Optionally, if the fourth indication information is used to indicate a matrix

Z ¹ _{k,c,d is} greater than or equal to X ¹ _l,k,g .

or

For the matrix

That is, the base matrix is the same when the value of l is different, or when

Middle element

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Z ² _k,c,d bits, Z ² _k,c,d are positive integers.

Optionally, if the seventh indication information is used to indicate a matrix

Z ² _{k,c,d is} greater than or equal to X ² _l,k,f .

or

For the matrix

That is, the base matrix is the same when the value of l is different, or when

If the first communication device directly feeds back the matrix

The amount of feedback is

among them

And the feedback amount of the third instruction information

among them

with

Is the number of bits for each parameter to be fed back.

In the embodiment of the present invention, through

Compressed as a complex matrix as a whole, a matrix containing 2L×N _sb ×N _r elements

Compressed into a matrix containing only L×N _sb ×M ₁ element

Magnitude matrix

For compression, the amplitude matrix containing 2L×N _sb ×N _r elements

Compressed into a matrix containing only L×N _sb ×M ₁ element

Phase matrix

For compression, the phase matrix containing 2L×N _sb ×N _r elements

Compressed into a matrix containing only L×N _sb ×M ₂ elements

Based on the schematic structural diagram of the communication system shown in FIG. 1, an embodiment of the present invention provides a method for reporting CSI. Specifically, the method for reporting CSI in the embodiment of the present invention may include the following steps:

The first communication device reports CSI, the CSI is used to indicate a matrix H ^(r) , the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the first communication device, and the matrix H ^{( r)} is a matrix with N _t rows and N _sb columns, N _sb is the number of frequency domain units included in the reported bandwidth of the CSI, N _t is a positive integer, r∈{1,2,...,N _r }, N _r Is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix

The matrix

The first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

In an implementation manner, the second indication information includes third indication information and fourth indication information, and the third indication information is used to indicate a three-dimensional matrix

It is a three-dimensional matrix of M ₁ page with L rows and P columns, M ₁ is a positive integer;

The fourth indication information is used to indicate the matrix

Is a matrix of 2N _r rows M ₁ column, or the fourth indication information is used to indicate the matrix

It is a matrix of 2N _r rows M ₁ column.

In one implementation, the matrix

Said

Is a three-dimensional matrix of 2N _r pages with L rows and P columns,

Means taking matrix

The embodiments of this application can be

Split into

To form 2N _r matrices with L rows and P columns, the function g(r,i) realizes these 2N _r matrices to a three-dimensional matrix

Mapping between pages.

If the fourth indication information is used to indicate the matrix

Then said

Is by type

Get, or if the fourth indication information is used to indicate the matrix

Then said

Is by type

get;

Means taking matrix

× is a one-dimensional vector

As a matrix multiplication of column vectors.

In one implementation, the matrix

Magnitude matrix

Said

The elements in row l and column k are based on the

The element in row l and column k is the

Said

Is a three-dimensional matrix of 2N _r pages with L rows and P columns,

Means taking matrix

The embodiments of this application can be

Split into

Mapping between pages.

If the fourth indication information is used to indicate the matrix

Then said

Is by type

Get, or if the fourth indication information is used to indicate the matrix

Then said

Is by type

get;

Means taking matrix

× is a one-dimensional vector

As a matrix multiplication of column vectors.

The phase of the element.

In an implementation manner, the fifth indication information is used to indicate the

The phase of elements in the middle, including:

It is a three-dimensional matrix with L rows and P columns and M ₂ pages, where M ₂ is a positive integer;

The seventh indication information is used to indicate the matrix

Is a matrix of 2N _r rows and M ₂ columns;

The matrix

Phase matrix

Said

The elements in row l and column k are based on the

The value determined by the phase of the element in the lth row and kth column, such as the

The element in row l and column k is the

Said

Is a three-dimensional matrix of 2N _r pages with L rows and P columns,

Means taking matrix

The embodiments of this application can be

Split into

To form 2N _r matrices with L rows and P columns, the function f(r,i) realizes these 2N _r matrices to a three-dimensional matrix

Mapping between pages.

If the seventh indication information is used to indicate the matrix

Then said

Is by type

Get, or if the seventh indication information is used to indicate the matrix

Then said

Is by type

get;

Means taking matrix

× is a one-dimensional vector

As a matrix multiplication of column vectors.

Then l'=l".

In this technical solution, the matrix

Each column vector of is the basis for compression of matrix H ^(r″) , matrix

Each column vector and matrix of

And matrix

The same DFT basis is selected, namely

Then the DFT base is in the matrix

And matrix

The l′=l″ row corresponds to the same base. The above is for the matrix

The constraint can improve the vector

Correlation between, thereby enhancing the compression effect.

And matrix

Then k′=k″.

In this technical solution, the matrix

Each column vector of is the basis for compression of matrix H ^(r″) , matrix

Each column vector and matrix of

And matrix

The same DFT basis is selected, namely

Then the DFT base is in the matrix

And matrix

The l′=l”th row corresponds to the same base; similarly, the matrix

And matrix

The constraints make the matrix

And matrix

The constraint can improve the vector

Correlation between, thereby enhancing the compression effect.

Middle element

X ¹ _l,k,g bits, X ¹ _l,k,g are positive integers, if the fourth indication information is used to indicate the matrix

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Then the fourth indication information includes an indication matrix

Element in row c and column d in

Z ¹ _{k, c, d} bits, Z ¹ _{k, c, d} are positive integers.

Optionally, if the fourth indication information is used to indicate a matrix

Z ¹ _{k,c,d is} greater than or equal to X ¹ _l,k,g .

or

For the matrix

That is, the base matrix is the same when the value of l is different, or when

Middle element

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Then the seventh indication information includes an indication matrix

Element in row c and column d in

Z ² _k,c,d bits, Z ² _k,c,d are positive integers.

Optionally, if the seventh indication information is used to indicate a matrix

Z ² _{k,c,d is} greater than or equal to X ² _l,k,f .

or

For the matrix

That is, the base matrix is the same when the value of l is different, or when

In this technical solution, the matrix

Magnitude matrix

Has strong correlation, phase matrix

The correlation is often weaker than the magnitude matrix

So the magnitude matrix

Comparative phase matrix

Often easy to compress. Amplitude matrix

The compression rate is determined by M ₁ , the phase matrix

4 is a schematic structural diagram of another communication system provided by an embodiment of the present application. The communication system includes a first communication device 401 and a second communication device 402. The first communication device 401 may include a first receiving unit 4011 and a first sending unit. Unit 4012, the second communication device 402 may include a second sending unit 4021 and a second receiving unit 4022.

The second sending unit 4021 is configured to send configuration information to the first receiving unit 4011, where the configuration information is used to configure the CSI reported by the first sending unit 4012;

The first sending unit 4012 is configured to report CSI to the second receiving unit 4022, where the CSI is used to indicate a matrix H ^(r) , and the matrix H ^{(r) is} used to indicate the rth antenna port of the first communication device The matrix H ^(r) is a matrix with N _t rows and N _sb columns, N _sb is the number of frequency domain units included in the reported bandwidth of the CSI, N _t is a positive integer, r ∈ {1,2, ..., N _r }, N _r is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix

The matrix

The first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

It should be noted that the content not mentioned in the embodiment corresponding to FIG. 4 and the specific implementation of the steps performed by each unit can refer to the embodiment shown in FIG. 1 and FIG. 2 and the foregoing content, and will not be repeated here.

In an implementation manner, the related functions implemented by the first receiving unit 4011 and the first sending unit 4012 in FIG. 4 can be implemented in combination with a processor, a receiver, and a transmitter. FIG. 5 is a schematic structural diagram of a terminal device provided by an embodiment of the present invention. The receiver 503 and the transmitter 504 can call the program code stored in the memory 502 to perform the following operations:

The receiver 503 receives configuration information from the second communication device, where the configuration information is used to configure the CSI reported by the transmitter;

The transmitter 504 reports CSI, where the CSI is used to indicate a matrix H ^(r) , the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the terminal device, and the matrix H ^(r) is N _t A matrix with rows N _{sb and} columns, N _sb is the number of frequency domain units included in the reported bandwidth of the CSI, N _t is a positive integer, r ∈ {1,2,...,N _r }, N _r is the first The number of antenna ports of the communication device, where the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix

The matrix

The first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

It should be noted that the content not mentioned in the embodiment corresponding to FIG. 5 and the specific implementation manner of each device execution step can refer to the embodiment shown in FIG. 1 and FIG. 2 and the foregoing content, which will not be repeated here.

In an implementation manner, the related functions implemented by the second sending unit 4021 and the second receiving unit 4022 in FIG. 4 can be implemented in combination with a processor, a receiver, and a transmitter. FIG. 6 is a schematic structural diagram of a network device provided by an embodiment of the present invention. The receiver 603 and the transmitter 604 can call the program code stored in the memory 602 to perform the following operations:

The transmitter 604 sends configuration information to the first communication device, where the configuration information is used to instruct the first communication device to report CSI;

The receiver 603 receives CSI from the first communication device, where the CSI is used to indicate a matrix H ^(r) , and the matrix H ^{(r) is} used to indicate the channel of the rth antenna port of the first communication device , The matrix H ^(r) is a matrix with N _t rows and N _sb columns, N _sb is the number of frequency domain units included in the reported bandwidth of the CSI, N _t is a positive integer, r∈{1,2,..., N _r }, N _r is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix

The matrix

The first indication information is used to indicate the matrix

And matrix

Is a matrix with N _t rows and 2L columns,

It should be noted that the content not mentioned in the embodiment corresponding to FIG. 6 and the specific implementation manner of each device execution step can refer to the embodiment shown in FIG. 1 and FIG. 2 and the foregoing content, and will not be repeated here.

In each of the above embodiments, the processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) Or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in Random Access Memory (RAM), Flash memory, Read-Only Memory (Read-Only Memory, ROM), programmable read-only memory, or electrically erasable programmable memory, registers, etc. mature in the field Storage medium. The storage medium is located in the memory, and the processor reads the instructions in the memory and completes the steps of the above method in combination with its hardware.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professional technicians can use different methods for each specific application to achieve the described functions.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

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

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, All should be covered by the protection scope of this application, so the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for reporting channel state information CSI, characterized in that it comprises:

The first communication device receives configuration information from the second communication device, where the configuration information is used to configure the CSI reported by the first communication device;

The first communication device reports CSI, the CSI is used to indicate a matrix H (r) , the matrix H (r) is used to indicate the channel of the rth antenna port of the first communication device, and the matrix H ( r) is a matrix with N t rows and N sb columns, N sb is the number of frequency domain units included in the reported bandwidth of the CSI, N t is a positive integer, r∈{1,2,...,N r }, N r Is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix
The matrix
It is a matrix with 2L rows and P columns, L is a positive integer, and 2L is less than N t ;

The first indication information is used to indicate the matrix
Is a matrix with N t rows and 2L columns, and P is N sb , or the first indication information is used to indicate the matrix
And matrix

Is a matrix with N t rows and 2L columns,
It is a matrix with N sb rows and K columns, K is a positive integer, K is less than N sb , and P is K.
The method according to claim 1, wherein the second indication information comprises third indication information and fourth indication information, and the third indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix of M 1 page with L rows and P columns, M 1 is a positive integer;

The fourth indication information is used to indicate the matrix
Is a matrix of 2N r rows M 1 column, or the fourth indication information is used to indicate the matrix
It is a matrix of 2N r rows M 1 column.
The method of claim 2, wherein the matrix

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The method of claim 2, wherein the matrix
Magnitude matrix

Said
The elements in row l and column k are based on the
The value determined by the amplitude of the element in the lth row and kth column;

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The method of claim 4, wherein the
The element in row l and column k is the
The magnitude or square of the magnitude of the element in the lth row and kth column.
5. The method according to any one of claims 1-5, wherein the second indication information comprises fifth indication information, and the fifth indication information is used to indicate the
The phase of the element.
The method according to claim 6, wherein the fifth indication information is used to indicate the
The phase of elements in the middle, including:

The fifth indication information includes sixth indication information and seventh indication information, and the sixth indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix with L rows and P columns and M 2 pages, where M 2 is a positive integer;

The seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows M 2 columns, or the seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows and M 2 columns;

The matrix
Phase matrix
Said
The elements in row l and column k are based on the
The value determined by the phase of the element in the lth row and kth column;

Among them, f(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), f(r′,i′)≠f(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns whose index is f(r,i), and the element in row l and column k in the two-dimensional matrix with L rows and P columns is

If the seventh indication information is used to indicate the matrix
Then said
Is by type

Get, or if the seventh indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 2 , and the m-th element in the one-dimensional vector with length M 2 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the f(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The method of claim 7, wherein the
The element in row l and column k is the
The phase or the square of the phase of the element in the lth row and kth column.
The method according to any one of claims 1-8, wherein the first indication information is used to indicate a matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and

Then l′=l″; or

The first indication information is used to indicate the matrix
And matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and
Then l′=l″, for any r′, r″∈{1,2,…,N r }, k′,k″∈{1,2,…,K}, if r′≠r” and
Then k′=k″.
The method according to any one of claims 2-9, wherein the third indication information includes
Middle element
X 1 l, k, g bits of X 1 l, k, g are positive integers, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Y 1 l,c,d bits of Y 1 l,c,d , Y 1 l,c,d are positive integers, or, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Z 1 k, c, d bits, Z 1 k, c, d are positive integers.
The method of claim 10, wherein if the fourth indication information is used to indicate a matrix
Then Y 1 l,c,d is greater than or equal to X 1 l,k,g , or if the fourth indication information is used to indicate the matrix
Then Z 1 k,c,d is greater than or equal to X 1 l,k,g .
The method according to any one of claims 7-11, wherein the sixth indication information includes
Middle element
X 2 l,k,f bits of X 2 l,k,f are positive integers, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Y 2 l,c,d bits of Y 2 l,c,d , Y 2 l,c,d are positive integers, or, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Z 2 k,c,d bits, Z 2 k,c,d are positive integers.
The method of claim 12, wherein if the seventh indication information is used to indicate a matrix
Then Y 2 l,c,d is greater than or equal to X 2 l,k,f , or if the seventh indication information is used to indicate the matrix
Then Z 2 k,c,d is greater than or equal to X 2 l,k,f .
A method for obtaining CSI, characterized in that it comprises:

The second communication device sends configuration information to the first communication device, where the configuration information is used to configure the CSI reported by the first communication device;

The second communication device receives CSI, the CSI is used to indicate a matrix H (r) , the matrix H (r) is used to indicate the channel of the rth antenna port of the first communication device, and the matrix H ( r) is a matrix with N t rows and N sb columns, N sb is the number of frequency domain units included in the reported bandwidth of the CSI, N t is a positive integer, r∈{1,2,...,N r }, N r Is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix
The matrix
It is a matrix with 2L rows and P columns, L is a positive integer, and 2L is less than N t ;

The first indication information is used to indicate the matrix
Is a matrix with N t rows and 2L columns, and P is N sb , or the first indication information is used to indicate the matrix
And matrix

Is a matrix with N t rows and 2L columns,
It is a matrix with N sb rows and K columns, K is a positive integer, K is less than N sb , and P is K.
The method according to claim 14, wherein the second indication information comprises third indication information and fourth indication information, and the third indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix of M 1 page with L rows and P columns, M 1 is a positive integer;

The fourth indication information is used to indicate the matrix
Is a matrix of 2N r rows M 1 column, or the fourth indication information is used to indicate the matrix
It is a matrix of 2N r rows M 1 column.
The method of claim 15, wherein the matrix

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r } and i∈{1,2}, and for any (r′,i ′)≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The method of claim 15, wherein the matrix
Magnitude matrix

Said
The elements in row l and column k are based on the
The value determined by the amplitude of the element in the lth row and kth column;

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third index of a two-dimensional matrix with L rows and P columns with an index of g(r, i), and the elements in the l row and k column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The method of claim 17, wherein the
The element in row l and column k is the
The magnitude or square of the magnitude of the element in the lth row and kth column.
The method according to any one of claims 14-18, wherein the second indication information comprises fifth indication information, and the fifth indication information is used to indicate the
The phase of the element.
The method according to claim 19, wherein the fifth indication information is used to indicate the
The phase of elements in the middle, including:

The fifth indication information includes sixth indication information and seventh indication information, and the sixth indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix with L rows and P columns and M 2 pages, where M 2 is a positive integer;

The seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows M 2 columns, or the seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows and M 2 columns;

The matrix
Phase matrix
Said
The elements in row l and column k are based on the
The value determined by the phase of the element in the lth row and kth column;

Among them, f(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″),

f(r′,i′)≠f(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns whose index is f(r,i), and the element in row l and column k in the two-dimensional matrix with L rows and P columns is

If the seventh indication information is used to indicate the matrix
Then said
Is by type

Get, or if the seventh indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 2 , and the m-th element in the one-dimensional vector with length M 2 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the f(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The method of claim 20, wherein the
The element in row l and column k is the
The phase or the square of the phase of the element in the lth row and kth column.
The method according to any one of claims 14-21, wherein the first indication information is used to indicate a matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and

Then l′=l″; or

The first indication information is used to indicate the matrix
And matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and
Then l′=l″, for any r′, r″∈{1,2,…,Nr}, k′,k″∈{1,2,…,K}, if r′≠r” and
Then k′=k″.
The method according to any one of claims 15-22, wherein the third indication information includes
Middle element
X 1 l,k,g bits of X 1 l,k,g are positive integers, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Y 1 l,c,d bits of Y 1 l,c,d , Y 1 l,c,d are positive integers, or, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Z 1 k, c, d bits, Z 1 k, c, d are positive integers.
The method of claim 23, wherein if the fourth indication information is used to indicate a matrix
Then Y 1 l,c,d is greater than or equal to X 1 l,k,g , or if the fourth indication information is used to indicate the matrix
Then Z 1 k,c,d is greater than or equal to X 1 l,k,g .
The method according to any one of claims 20-24, wherein the sixth indication information includes
Middle element
X 2 l,k,f bits of X 2 l,k,f are positive integers, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Y 2 l,c,d bits of Y 2 l,c,d , Y 2 l,c,d are positive integers, or, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Z 2 k,c,d bits, Z 2 k,c,d are positive integers.
The method of claim 25, wherein if the seventh indication information is used to indicate a matrix
Then Y 2 l,c,d is greater than or equal to X 2 l,k,f , or if the seventh indication information is used to indicate the matrix
Then Z 2 k,c,d is greater than or equal to X 2 l,k,f .
A communication device, characterized in that the device comprises a unit for implementing the method for reporting CSI according to any one of claims 1-13.
A communication device, characterized in that the device comprises a unit for implementing the method for obtaining CSI according to any one of claims 14-26.
A terminal device, comprising a receiver and a transmitter, the receiver is coupled with the transmitter, and is characterized in that:

The receiver is configured to receive configuration information from a second communication device, where the configuration information is used to configure the CSI reported by the transmitter;

The transmitter is used to report CSI, the CSI is used to indicate a matrix H (r) , the matrix H (r) is used to indicate the channel of the rth antenna port of the terminal device, and the matrix H (r ) Is a matrix of N t rows and N sb columns, N sb is the number of frequency domain units included in the reported bandwidth of the CSI, N t is a positive integer, r∈{1,2,...,N r }, N r is The number of antenna ports of the terminal device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix
The matrix
It is a matrix with 2L rows and P columns, L is a positive integer, and 2L is less than N t ;

The first indication information is used to indicate the matrix
Is a matrix with N t rows and 2L columns, and P is N sb , or the first indication information is used to indicate the matrix
And matrix

Is a matrix with N t rows and 2L columns,
It is a matrix with N sb rows and K columns, K is a positive integer, K is less than N sb , and P is K.
The terminal device according to claim 29, wherein the second indication information comprises third indication information and fourth indication information, and the third indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix of M 1 page with L rows and P columns, M 1 is a positive integer;

The fourth indication information is used to indicate the matrix
Is a matrix of 2N r rows M 1 column, or the fourth indication information is used to indicate the matrix
It is a matrix of 2N r rows M 1 column.
The terminal device of claim 30, wherein the matrix

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The terminal device of claim 30, wherein the matrix
Magnitude matrix

Said
The elements in row l and column k are based on the
The value determined by the amplitude of the element in the lth row and kth column;

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The terminal device according to claim 32, wherein the
The element in row l and column k is the
The magnitude or square of the magnitude of the element in the lth row and kth column.
The terminal device according to any one of claims 29-33, wherein the second indication information comprises fifth indication information, and the fifth indication information is used to indicate the
The phase of the element.
The terminal device according to claim 34, wherein the fifth indication information is used to indicate the
The phase of elements in the middle, including:

The fifth indication information includes sixth indication information and seventh indication information, and the sixth indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix with L rows and P columns and M 2 pages, where M 2 is a positive integer;

The seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows M 2 columns, or the seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows and M 2 columns;

The matrix
Phase matrix
Said
The elements in row l and column k are based on the
The value determined by the phase of the element in the lth row and kth column;

Among them, f(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), f(r′,i′)≠f(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns whose index is f(r,i), and the element in row l and column k in the two-dimensional matrix with L rows and P columns is

If the seventh indication information is used to indicate the matrix
Then said
Is by type

Get, or if the seventh indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 2 , and the m-th element in the one-dimensional vector with length M 2 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the f(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The terminal device according to claim 35, wherein the
The element in row l and column k is the
The phase or the square of the phase of the element in the lth row and kth column.
The terminal device according to any one of claims 29-36, wherein the first indication information is used to indicate a matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and
Then l′=l″; or

The first indication information is used to indicate the matrix
And matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and
Then l′=l″, for any r′, r″∈{1,2,…,N r }, k′,k″∈{1,2,…,K}, if r′≠r” and
Then k′=k″.
The terminal device according to any one of claims 30-37, wherein the third indication information includes
Middle element
X 1 l,k,g bits of X 1 l,k,g are positive integers, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Y 1 l,c,d bits of Y 1 l,c,d , Y 1 l,c,d are positive integers, or, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Z 1 k, c, d bits, Z 1 k, c, d are positive integers.
The terminal device according to claim 38, wherein if the fourth indication information is used to indicate a matrix
Then Y 1 l,c,d is greater than or equal to X 1 l,k,g , or if the fourth indication information is used to indicate the matrix
Then Z 1 k,c,d is greater than or equal to X 1 l,k,g .
The terminal device according to any one of claims 35-39, wherein the sixth indication information includes
Middle element
X 2 l,k,f bits of X 2 l,k,f are positive integers, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Y 2 l,c,d bits of Y 2 l,c,d , Y 2 l,c,d are positive integers, or, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Z 2 k,c,d bits, Z 2 k,c,d are positive integers.
The terminal device according to claim 40, wherein if the seventh indication information is used to indicate a matrix
Then Y 2 l,c,d is greater than or equal to X 2 l,k,f , or if the seventh indication information is used to indicate the matrix
Then Z 2 k,c,d is greater than or equal to X 2 l,k,f .
A network device includes a receiver and a transmitter, the receiver is coupled with the transmitter, and is characterized in that:

The transmitter is configured to send configuration information to a first communication device, where the configuration information is used to configure the CSI reported by the first communication device;

The receiver is configured to receive CSI, the CSI is used to indicate a matrix H (r) , the matrix H (r) is used to indicate the channel of the rth antenna port of the first communication device, and the matrix H (r) is a matrix with N t rows and N sb columns, N sb is the number of frequency domain units included in the reported bandwidth of the CSI, N t is a positive integer, r∈{1,2,...,N r }, N r is the number of antenna ports of the first communication device, and the CSI includes first indication information and second indication information;

The second indication information is used to indicate the matrix
The matrix
It is a matrix with 2L rows and P columns, L is a positive integer, and 2L is less than N t ;

The first indication information is used to indicate the matrix
Is a matrix with N t rows and 2L columns, and P is N sb , or the first indication information is used to indicate the matrix
And matrix

Is a matrix with N t rows and 2L columns,
It is a matrix with N sb rows and K columns, K is a positive integer, K is less than N sb , and P is K.
The network device according to claim 42, wherein the second indication information comprises third indication information and fourth indication information, and the third indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix of M 1 page with L rows and P columns, M 1 is a positive integer;

The fourth indication information is used to indicate the matrix
Is a matrix of 2N r rows M 1 column, or the fourth indication information is used to indicate the matrix
It is a matrix of 2N r rows M 1 column.
The network device of claim 43, wherein the matrix

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r } and i∈{1,2}, and for any (r′,i ′)≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns with an index of g(r,i), and the elements in the lth row and kth column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The network device of claim 43, wherein the matrix
Magnitude matrix

Said
The elements in row l and column k are based on the
The value determined by the amplitude of the element in the lth row and kth column;

Among them, g(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), g(r′,i′)≠g(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third index of a two-dimensional matrix with L rows and P columns with an index of g(r, i), and the elements in the l row and k column of the L rows and P columns of the two-dimensional matrix are

If the fourth indication information is used to indicate the matrix
Then said
Is by type

Get, or if the fourth indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 1 , and the m-th element in the one-dimensional vector with length M 1 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the g(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The network device of claim 45, wherein the
The element in row l and column k is the
The magnitude or square of the magnitude of the element in the lth row and kth column.
The network device according to any one of claims 42-46, wherein the second indication information comprises fifth indication information, and the fifth indication information is used to indicate the
The phase of the element.
The network device according to claim 47, wherein the fifth indication information is used to indicate the
The phase of elements in the middle, including:

The fifth indication information includes sixth indication information and seventh indication information, and the sixth indication information is used to indicate a three-dimensional matrix
It is a three-dimensional matrix with L rows and P columns and M 2 pages, where M 2 is a positive integer;

The seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows M 2 columns, or the seventh indication information is used to indicate the matrix
Is a matrix of 2N r rows and M 2 columns;

The matrix
Phase matrix
Said
The elements in row l and column k are based on the
The value determined by the phase of the element in the lth row and kth column;

Among them, f(r,i)∈{1,2,…,2N r }, r∈{1,2,…,N r }, i∈{1,2}, and for any (r′,i′ )≠(r″,i″), f(r′,i′)≠f(r″,i″);

Said
Is a three-dimensional matrix of 2N r pages with L rows and P columns,
Means taking matrix
Fix the third two-dimensional matrix with L rows and P columns whose index is f(r,i), and the element in row l and column k in the two-dimensional matrix with L rows and P columns is

If the seventh indication information is used to indicate the matrix
Then said
Is by type

Get, or if the seventh indication information is used to indicate the matrix
Then said
Is by type
get;

Means taking matrix
Fix the first two one-dimensional vectors with index length M 2 , and the m-th element in the one-dimensional vector with length M 2 is
Means taking matrix
Fix the first two one-dimensional vectors with an index length of 2N r , and the f(r, i)th element of the one-dimensional vector with length 2N r is
× is a one-dimensional vector
As a matrix multiplication of column vectors.
The network device according to claim 48, wherein said
The element in row l and column k is the
The phase or the square of the phase of the element in the lth row and kth column.
The network device according to any one of claims 42-49, wherein the first indication information is used to indicate a matrix
In the case of, for any r′,r″∈{1,2,…,Nr}, l′,l″∈{1,2,…,2L}, if r′≠r” and
Then l′=l″; or

The first indication information is used to indicate the matrix
And matrix
In the case of, for any r′,r″∈{1,2,…,N r }, l′,l″∈{1,2,…,2L}, if r′≠r” and
Then l′=l″, for any r′, r″∈{1,2,…,N r }, k′,k″∈{1,2,…,K}, if r′≠r” and
Then k′=k″.
The network device according to any one of claims 43-50, wherein the third indication information includes
Middle element
X 1 l,k,g bits of X 1 l,k,g are positive integers, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Y 1 l,c,d bits of Y 1 l,c,d , Y 1 l,c,d are positive integers, or, if the fourth indication information is used to indicate the matrix
Then the fourth indication information includes an indication matrix
Element in row c and column d in
Z 1 k, c, d bits, Z 1 k, c, d are positive integers.
The network device of claim 51, wherein if the fourth indication information is used to indicate a matrix
Then Y 1 l,c,d is greater than or equal to X 1 l,k,g , or if the fourth indication information is used to indicate the matrix
Then Z 1 k,c,d is greater than or equal to X 1 l,k,g .
The network device according to any one of claims 48-52, wherein the sixth indication information includes
Middle element
X 2 l,k,f bits of X 2 l,k,f are positive integers, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Y 2 l,c,d bits of Y 2 l,c,d , Y 2 l,c,d are positive integers, or, if the seventh indication information is used to indicate the matrix
Then the seventh indication information includes an indication matrix
Element in row c and column d in
Z 2 k,c,d bits, Z 2 k,c,d are positive integers.
The network device of claim 53, wherein if the seventh indication information is used to indicate a matrix
Then Y 2 l,c,d is greater than or equal to X 2 l,k,f , or if the seventh indication information is used to indicate the matrix
Then Z 2 k,c,d is greater than or equal to X 2 l,k,f .
A computer storage medium, wherein the computer storage medium stores a computer program or instruction, and when the program or instruction is executed by a processor, the processor executes any one of claims 1-13 The method for reporting CSI.
A computer storage medium, wherein the computer storage medium stores a computer program or instruction, and when the program or instruction is executed by a processor, the processor executes any one of claims 14-26 The method for obtaining CSI.