Information feedback method, terminal, base station, storage medium, electronic device

A technology of information feedback and phase information, applied in the field of communication, can solve the problems of large CSI feedback overhead, no solution found, limited performance, etc., and achieve the effect of improving resource utilization.

Active Publication Date: 2022-08-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of precoding codebook can be classified as the first type of codebook. This codebook has a small overhead, but the CSI quantization accuracy is low and the performance is relatively limited.
Another type of codebook is to linearly weight the DFT vector or the Kronecker product of the DFT vector, and feed back the relevant information of the DFT vector, the amplitude and phase information of the weighting coefficient to the base station as precoding indication information, such a precoding codebook It can be classified as the second type of codebook. The CSI quantization accuracy of this codebook is high, but the CSI overhead is relatively large, especially when high rank or many DFT vectors are linearly weighted and combined, it will bring a large CSI feedback overhead.
[0004] For the above-mentioned problems existing in related technologies, no effective solution has been found yet

Method used

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  • Information feedback method, terminal, base station, storage medium, electronic device
  • Information feedback method, terminal, base station, storage medium, electronic device
  • Information feedback method, terminal, base station, storage medium, electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment of the present application can run in figure 1 On the network architecture shown, as figure 1 shown, figure 1 It is a network architecture diagram of an embodiment of the present invention. The network architecture includes: a terminal and a base station, wherein the terminal interacts with the base station.

[0025] In this embodiment, an information feedback method running on the above-mentioned network architecture is provided, figure 2 is a flowchart of an information feedback method according to an embodiment of the present invention, such as figure 2 As shown, the process includes the following steps:

[0026] Step S202, decompose the CSI matrix H to obtain the matrix U d and V d , where U d is a d-column matrix, and each column vector is orthogonal to each other, V d is a d-column matrix, and each column vector is orthogonal to each other;

[0027] Step S204, feedback d left feature vectors U d magnitude and phase information of eleme...

Embodiment 2

[0087] In this embodiment, an information feedback device is also provided, which is used to implement the above-mentioned embodiments and preferred implementations, and what has been described will not be repeated. As used below, the term "module" may be a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementations in hardware, or a combination of software and hardware, are also possible and contemplated.

[0088] Figure 4 is a structural block diagram of an information feedback terminal according to an embodiment of the present invention, such as Figure 4 As shown, the device includes:

[0089] The decomposition module 40 is used to decompose the matrix H to obtain the matrices Ud and Vd, wherein U d is a d-column matrix, and each column vector is orthogonal to each other, V d is a d-column matrix, and each column vector is orthogon...

Embodiment 3

[0148] The terminal performs SVD decomposition according to the R-layer CSI on the M subbands and the N antenna ports, and feeds back d left eigenvectors U d , and / or the d right eigenvectors V d The magnitude and phase information of the elements in

[0149] The matrix for SVD decomposition is the combination of the precoding matrices recommended or preferred by the terminal on each subband for the rth layer.

[0150] The terminal feeds back the subband CQI, and the precoding matrix assumed by the calculation of the CQI of the mth subband is based on the U of each layer in each layer for this subband. d and V d H After multiplication, the matrix formed by the union of the column vectors corresponding to the subband is obtained

[0151] The value of d is determined according to at least one of the following methods:

[0152] Base station configuration signaling;

[0153] d left special positive vectors, and / or d right eigenvectors, associated with d eigenvalues;

[0154...

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Abstract

The present invention provides an information feedback method, a terminal, a base station, a storage medium, and an electronic device, wherein the method includes: decomposing a channel state information CSI matrix H to obtain a matrix U d and V d , where U d is a d-column matrix, and each column vector is orthogonal to each other, V d It is a matrix of d columns, and each column vector is orthogonal to each other; d left eigenvectors U are fed back d magnitude and phase information of elements in , and / or, feedback d right eigenvectors V d The magnitude and phase information of the elements in . The present invention solves the technical problem that the feedback CSI overhead is too large in the related art.

Description

technical field [0001] The present invention relates to the field of communications, and in particular, to an information feedback method, a terminal, a base station, a storage medium, and an electronic device. Background technique [0002] In a multiple-input multiple-output (Multiple Input Multiple Output, MIMO for short) wireless communication system in the related art, the purpose of improving transmission efficiency and reliability can be achieved by performing precoding or beamforming on multiple transmitting antennas. In order to achieve high-performance precoding or beamforming, the precoding matrix or beamforming vector needs to be well matched to the channel, which requires that the transmitter can better obtain channel state information (Channel State Information, CSI). Therefore, CSI feedback is a key technique to achieve high-performance precoding or beamforming in MIMO systems. However, when CSI feedback is performed, the quantized feedback of the channel matr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0413H04B7/0417H04B7/06
CPCH04B7/0413H04B7/0417H04B7/0626H04B7/0634H04B7/0478
Inventor 吴昊鲁照华陈艺戬蒋创新张楠
Owner ZTE CORP
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