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

A sending method and communication node technology, applied in the field of communication, can solve the problem of single CSI feedback mode, and achieve the effect of rich methods

Active Publication Date: 2019-12-03
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 method and device, CSI receiving method and device, communication node and storage medium
  • CSI sending method and device, CSI receiving method and device, communication node and storage medium
  • CSI sending method and device, CSI receiving method and device, communication node and storage medium

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment provides a CSI sending method, please refer to figure 1 As 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 basis vectors. In this embodiment, each vector unit in at least one vector matrix in the obtained vector group can be orthogonal to each other, and the vector unit in this embodiment can be a column in the vector matrix, or a row in the vector matrix .

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

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

[0038] The channel state information reference signal CSI-RS (Channel State Information Reference Sign...

Embodiment 2

[0153] This embodiment provides a method for receiving CSI, please refer to image 3 As shown, applied to the second communication node, including:

[0154] S301: Receive quantized element information.

[0155] Specifically, the second communication node may receive the quantized element information sent by the first communication node.

[0156] The element information in this embodiment is information corresponding to elements in at least one vector matrix in the vector group obtained by decomposing the CSI matrix H, and the vector group obtained by decomposing H includes at least two vector matrices.

[0157] The CSI matrix H may be a precoding matrix recommended by the first communication node, or a weighting coefficient matrix for linearly combining codebook basis vectors. In this embodiment, each vector unit in at least one vector matrix in the obtained vector group can be orthogonal to each other, and the vector unit in this embodiment can be a column in the vector mat...

Embodiment 3

[0242] Assume that the vector matrix obtained by decomposing matrix H includes matrix U and matrix V. Generally speaking, U contains K N-dimensional vectors [U 1 …U K ], V contains T M-dimensional vectors [V 1 …V T ], to quantize the elements in these vectors, one of the simplest ways is to quantize the amplitude information of each element with X bits, and quantize the phase information of each element with Y bits. 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.

[0243] So here are some quantization methods that can reduce feedback overhead.

[0244] The first quantification method:

[0245] For a certain vector matrix in U and V, first obtain the first amplitude information for the entire vector matrix, the first amplitude information can be the maximum value of the amplitudes of all elements in the vector, or the average value of the amplitudes of all elements in the vector, to Quantizin...

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Abstract

The embodiment of the invention provides a CSI sending method and a device, a CSI receiving method and a device, a communication node and a storage medium. The method comprises the following steps: decomposing a CSI matrix H to obtain a vector group; wherein the vector group at least comprises two vector matrixes; quantizing element information in at least one vector matrix in the vector group; according to the method of the invention, the quantized element information is sent, and in some implementation processes, the quantized feedback can be carried out based on the element information in the vector group after CSI matrix decomposition, so that the modes of CSI quantized feedback are enriched, and more implementation modes are provided for CSI quantized feedback.

Description

technical field [0001] Embodiments of the present invention relate to but are not limited to the field of communication technologies, and specifically, relate to but are not limited to CSI sending and receiving methods and devices thereof, 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 transmit 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 better obtain CSI (Channel State Information, channel state information). Therefore, CSI feedback It is the key technology to realize high-performance precoding or beamforming in MIMO system. In a traditional wireless communication syst...

Claims

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Application Information

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Patent Type & Authority Applications(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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