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Channel state information processing method, device, terminal and base station

A technology of channel state information and information processing method, which is applied in the field of communication and can solve the problems of difficult codeword selection and increased link overhead.

Active Publication Date: 2020-09-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] The present invention provides a channel state information processing method, device, terminal and base station to at least solve the problem of codeword selection difficulty and link overhead increase in Massive MIMO in which codebook feedback channel state information is applied to Massive MIMO in related technologies. big problem

Method used

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  • Channel state information processing method, device, terminal and base station
  • Channel state information processing method, device, terminal and base station
  • Channel state information processing method, device, terminal and base station

Examples

Experimental program
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Effect test

Embodiment 1

[0192] The base station and the terminal store the same set or multiple sets of codebook models. The codebook model stored between the terminal and the base station can be one or more of the following codebook models:

[0193] W I1 =[v 0 αv 1 βv 2 γv 3 ] T

[0194] W I2 =[v' 0 αv' 1 βv' 2 γv' 3 λv' 4 μv' 5 κv' 6 τv' 7 ] T

[0195] W IJ1 =Λ·[v 0 αv 1 βv 2 γv 3 ] T , Λ is a diagonal matrix and not all elements have the same magnitude;

[0196] W IJ2 = Λ [v' 0 αv' 1 βv' 2 γv' 3 λv' 4 μv' 5 κv' 6 τv' 7 ]Λ is a diagonal matrix and not all elements have the same magnitude;

[0197] Among them, the fundamental matrix v 0 , v 1 , v 2 , v 3 , both are v×(N t / 4) matrix, fundamental matrix v' 0 , v' 1 , v' 2 , v' 3 , v' 4 , v' 5 , v' 6 , v' 7 Both are v×(N t / 8) matrix, α, β, γ, λ, μ, κ, τ are all complex numbers, Nt represents the total number of ports or the total number of antennas; υ represents the total number of la...

Embodiment 2

[0204] This embodiment realizes the terminal's function of selecting a feedback codebook model, and the terminal performs channel quantization and reports the channel according to the selected feedback codebook model. Figure 15 It is a flow chart according to the preferred embodiment 2 of the present invention, such as Figure 15 As shown, the process includes the following steps:

[0205] Step S1502, the base station and the terminal will save the same set or multiple sets of codebook models, and the base station sends the measurement pilot CSI-RS to the terminal;

[0206] Step S1504, the terminal obtains the current channel H through the CSI-RS, the terminal receives and measures the CS-RS sent by the base station, and uses the CSI-RS measurement to estimate the current channel information H;

[0207] Step S1506, the terminal selects a codebook model according to the channel H information, that is, if the base station and the terminal store the same multiple sets of codebo...

Embodiment 3

[0224] Figure 16 It is a flow chart according to the preferred embodiment 3 of the present invention, such as Figure 16 As shown, this embodiment implements the function of the terminal to select the feedback precision, and the terminal performs channel quantization and reports according to the selected feedback precision. The process includes the following steps:

[0225] Step S1602, the base station and the terminal store the same set or multiple sets of codebook models, and the base station sends the measurement pilot CSI-RS to the terminal;

[0226] Step S1604, the terminal receives the CS-RS sent by the measurement base station, and uses the CSI-RS measurement to estimate the current channel information H;

[0227] Step S1606, the terminal selects the codebook accuracy according to the channel H information;

[0228] The terminal can select the feedback accuracy of the reported codebook according to the current channel status or reporting conditions: for example, the...

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Abstract

Provided are a method and device for processing Channel State Information (CSI), User Equipment (UE) and an Evolved Node B (eNodeB). The method includes: storing one or more sets of precoding codebook models the same as those of an eNodeB; determining a precoding codebook model for feeding back CSI; and sending the CSI to the eNodeB by adopting the determined precoding codebook model. By the solution, the problems of difficulty in code word selection and increase of link overhead during application of a codebook-based CSI feedback manner to massive Multi-input Multi-output (MIMO) in the related technology is solved, and the effect of reducing codebook transmission overhead is further achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel state information processing method, device, terminal and base station. Background technique [0002] In a wireless communication system, the sending end and the receiving end use multiple antennas to obtain a higher rate by means of spatial multiplexing. Compared with the general spatial multiplexing method, an enhanced technology is that the receiving end feeds back channel information to the sending end, and the sending end uses some transmit precoding techniques according to the obtained channel information to greatly improve the transmission performance. For single-user multiple-input multiple-output (Multi-input Multi-output, MIMO for short), channel feature vector information is directly used for precoding; for multi-user MIMO, more accurate channel information is required. [0003] In the Long Term Evolution (LTE for short) plan, the feedback of channel inform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456
CPCH04B7/0456H04B7/0626H04L1/0026H04B7/0452H04L25/03898H04L1/16
Inventor 赵晶陈艺戬徐俊肖华华鲁照华
Owner ZTE CORP
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