CSI sending and receiving method and its device, communication node and storage medium

A sending method and communication node technology, applied in the field of communication, can solve problems such as a single CSI feedback method

Active Publication Date: 2022-07-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In traditional wireless communication systems, the elements in the CSI matrix are usually directly quantified and fed back, and the CSI feedback method is single

Method used

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  • CSI sending and receiving method and its device, communication node and storage medium
  • CSI sending and receiving method and its device, communication node and storage medium
  • CSI sending and receiving method and its device, communication node and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment provides a method for sending CSI, please refer to figure 1 shown, applied to the first communication node, including:

[0034] S101: Decompose the CSI matrix H to obtain a vector group.

[0035] The vector group obtained in step S101 includes at least two vector matrices. The CSI matrix H may be a precoding matrix recommended by the first communication node, or a weighting coefficient matrix for linearly combining codebook basic vectors. In this embodiment, each vector unit in at least one vector matrix in the obtained vector group may be orthogonal to each other, and the vector unit in this embodiment may be a column in the vector matrix, or may be a row in the vector matrix .

[0036] The dimension of the vector matrix in this embodiment may be determined by at least one of the following:

[0037] The number of subbands in the CSI feedback bandwidth;

[0038] the number of channel state information reference signal CSI-RS (Channel State Informati...

Embodiment 2

[0152] This embodiment provides a method for receiving CSI, please refer to image 3 shown, applied to the second communication node, including:

[0153] S301: Receive quantized element information.

[0154] Specifically, the second communication node may receive the quantized element information sent by the first communication node.

[0155] The element information in this embodiment is information corresponding to elements in at least one vector matrix in a vector group obtained by decomposing the CSI matrix H, and the vector group obtained by decomposing H includes at least two vector matrices.

[0156] The CSI matrix H may be a precoding matrix recommended by the first communication node, or a weighting coefficient matrix for linearly combining codebook basic vectors. In this embodiment, each vector unit in at least one vector matrix in the obtained vector group may be orthogonal to each other, and the vector unit in this embodiment may be a column in the vector matrix, ...

Embodiment 3

[0240] Assuming that the vector matrix obtained by decomposing matrix H includes matrix U and matrix V, in general, U contains K N-dimensional vectors [U 1 … U K ], V contains T M-dimensional vectors [V 1 … V T ], quantize the elements in these vectors, one of the simplest way is to use X bits to quantize the amplitude information of each element and Y bits to quantize the phase information of each element. The problem that this method may bring is that when the values ​​of N and M are large, it will bring a large feedback overhead.

[0241] So here are some quantization methods that can reduce the feedback overhead.

[0242] The first quantification method:

[0243] For a certain vector matrix in U and V, firstly obtain the first magnitude information for the entire vector matrix, the first magnitude information may be the maximum magnitude of all element magnitudes in the vector, or the average value of all element magnitudes in the vector, with X bits quantize the fi...

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Abstract

Embodiments of the present invention provide a CSI sending and receiving method, device, communication node, and storage medium. A vector group is obtained by decomposing a CSI matrix H, wherein the vector group includes at least two vector matrices, and at least two vector matrices are included in the vector group. The element information in a vector matrix is ​​quantized, and the quantized element information is sent. In some implementation processes, quantization feedback can be performed based on the element information in the vector group decomposed by the CSI matrix, which enriches the CSI quantization feedback. mode, which provides more implementation modes for CSI quantization feedback.

Description

technical field [0001] The embodiments of the present invention relate to, but are not limited to, the field of communications technologies, and specifically relate to, but are not limited to, CSI sending and receiving methods and apparatuses, communication nodes, and storage media. Background technique [0002] In a MIMO (Multiple input multiple output, multiple input multiple output technology) wireless communication system, 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 better match the channel, which requires the transmitter to obtain CSI (Channel State Information, channel state information) better. Therefore, CSI feedback It is a key technology to achieve high-performance precoding or beamforming in MIMO systems. In a traditional wireless communicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04B7/0413H04B7/0456
CPCH04B7/0413H04B7/0456H04B7/0486H04B7/0663H04L1/0029H04B7/0626
Inventor 吴昊郑国增肖华华李永鲁照华李儒岳
Owner ZTE CORP
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