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Channel state information reporting method, channel state information decoding method, terminal and network side equipment

A technology of channel state information and network side equipment, which is applied in the field of communication and can solve problems such as unreported coefficients and quantization methods

Active Publication Date: 2020-07-21
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The purpose of the embodiments of the present invention is to provide a method for reporting channel state information, a decoding method, a terminal, and a network-side device, so as to solve the problem that there is no corresponding coefficient reporting and quantization method for the Rel-16 codebook structure

Method used

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  • Channel state information reporting method, channel state information decoding method, terminal and network side equipment
  • Channel state information reporting method, channel state information decoding method, terminal and network side equipment
  • Channel state information reporting method, channel state information decoding method, terminal and network side equipment

Examples

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example 1

[0153] Example 1: Amplitude quantization information and phase quantization information are reported in the same part of the CSI

[0154] The 2L beams of each layer of the precoding matrix use the same basis vector set, and the number of basis vectors in the set is M. Each layer reports 2L*M coefficients. Taking the Type II codebook with Rank=1 as an example, its precoding expression is:

[0155]

[0156] Among them, W 1 The orthogonal combined beams contained in are the same as the Type II codebook of Rel-15; Indicates the post-compression coefficient, where p i,j Indicates the magnitude coefficient, c i,j Indicates the phase coefficient, which needs to be fed back to the base station; W f Indicates the compressed basis vector, which contains M basis vectors, and the length of each vector is N, and N is determined by the number of subbands.

[0157] Assume that the reporting of Type II CSI adopts a two-part structure. The first part may include an indication of the n...

example 2

[0158] Example 2: Amplitude quantization information and phase quantization information are reported in different parts of the CSI

[0159] The 2L beams of each layer of the precoding matrix use the same basis vector set, and the number of basis vectors in the set is M. Each layer reports 2L*M coefficients. Taking the Type II codebook with Rank=1 as an example, its precoding expression is:

[0160]

[0161] Among them, W 1 The orthogonal combined beams contained in are the same as the Type II codebook of Rel-15; Indicates the post-compression coefficient, where p i,j Indicates the magnitude coefficient, c i,j Indicates the phase coefficient, which needs to be fed back to the base station; W f Indicates the compressed basis vector, which contains M basis vectors, and the length of each vector is N, and N is determined by the number of subbands.

[0162] It is assumed that the reporting of Type II CSI adopts a three-part structure. The first part may include an indica...

example 3

[0165] Example 3: Amplitude quantization information and phase quantization information are reported in different parts of the CSI

[0166] The 2L beams of each layer of the precoding matrix use the same basis vector set, and the number of basis vectors in the set is M. Each layer reports 2L*M coefficients. Taking the Type II codebook with Rank=1 as an example, its precoding expression is:

[0167]

[0168] Among them, W 1 The orthogonal combined beams contained in are the same as the Type II codebook of Rel-15; Indicates the post-compression coefficient, where p i,j Indicates the magnitude coefficient, c i,j Indicates the phase coefficient, which needs to be fed back to the base station; W f Indicates the compressed basis vector, which contains M basis vectors, and the length of each vector is N, and N is determined by the number of subbands.

[0169] It is assumed that the reporting of Type II CSI adopts a three-part structure. The first part may include an indica...

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Abstract

The invention provides a channel state information reporting method, a channel state information decoding method, a terminal and network side equipment. The channel state information reporting methodcomprises the following steps: acquiring phase quantization information of phase coefficients of a plurality of to-be-reported sub-bands and amplitude quantization information of amplitude coefficients of the plurality of to-be-reported sub-bands; wherein the plurality of phase coefficients are quantized by using the same or different quantized bits to obtain the phase quantization information, and the plurality of amplitude coefficients are quantized by using the same or different quantized bits to obtain the amplitude quantization information; reporting the phase quantization information andthe amplitude quantization information to network side equipment through the same part or different parts of CSI; the reporting method can further reduce the feedback overhead.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for reporting channel state information, a decoding method, a terminal and a network side device. Background technique [0002] NR (New Raido, New Air Interface) Rel-15 defines a Type II (Type II) codebook, which is based on the linear combination of beams in an orthogonal beam group, and supports rank (rank) = 1 codebook and rank = 2 codebooks. [0003] For a subband, the rank=1 codebook is expressed as: [0004] [0005] Rank=2 codebook is expressed as: [0006] [0007] in, L represents the number of orthogonal beams in the group, Represents an orthogonal beam, which uses a 2D DFT (two-dimensional discrete Fourier transform) vector, r=0,1 represents the first polarization direction and the second polarization direction in a dual-polarized antenna array, l=0,1 presentation layer. Indicates the bandwidth amplitude coefficient acting on beam...

Claims

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Application Information

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IPC IPC(8): H04W24/10H04L5/00
CPCH04W24/10H04L5/0053
Inventor 刘正宣高秋彬李辉
Owner DATANG MOBILE COMM EQUIP CO LTD
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