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Feedback method and device for channel state information

A technology of channel state information and information group, applied in the field of communication, to achieve the effect of improving resource utilization

Active Publication Date: 2021-06-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Embodiments of the present invention provide a channel state information feedback method and device to at least solve the problem in the related art that the precoding matrix is ​​fed back or the beam is selected based on the strongest path information in the channel

Method used

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  • Feedback method and device for channel state information
  • Feedback method and device for channel state information

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Experimental program
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Embodiment 1

[0040] This embodiment provides a feedback method for channel state information, figure 1 is a flowchart of a feedback method of channel state information according to an embodiment of the present invention, such as figure 1 As shown, the steps of the method include:

[0041] Step S102: The terminal selects N information groups from the configured M information groups; wherein, N and M are positive integers, and N is less than or equal to M;

[0042] Step S104: The terminal processes the selected N information groups in a preset manner to obtain the index information of the N information groups and the parameter information of the preset method; wherein, the index information includes: group indexes of the N information groups or N the index of the information in the information group;

[0043] Step S106: The terminal feeds back index information and parameter information.

[0044] Through the above-mentioned steps S102 to S106 in this embodiment, the terminal can feed back...

Embodiment approach 1

[0049] In the case where the information group is a codeword group, the way the terminal in this embodiment configures M information groups through configuration information includes:

[0050] Step S11: The terminal acquires the first dimension index i in the first codebook 11 and the second dimension index i of the first codebook 12 ;

[0051] Step S21: The terminal constructs the first dimension index of the first codebook of the codewords in each codeword group as i11+Xj, and the second dimension index of the first codebook of the codewords in each codeword group is i 12 +Y j ; among them, i 11 i 12 、X j and Y j is an integer.

Embodiment approach 2

[0053] When the information group is a codeword group, the codewords in the codeword group configured by the configuration information are mutually orthogonal. Based on this, the manner in which the terminal in this embodiment configures M information groups through configuration information may include:

[0054] Step S21: The terminal acquires the first dimension index i in the first codebook 11 and the second dimension index i of the first codebook 12 ;

[0055] Step S22: The terminal constructs the first dimension index of the first codebook of the codewords in each codeword group is i 11 +p*O1, and the second dimension index of the first codebook of the codewords in each codeword group is i 12 +q*O2; wherein, p and q are integers, O1 and O2 are the oversampling factors of the first dimension and the second dimension respectively.

[0056] It should be noted that the integer X involved in the above-mentioned embodiment j , Y j The values ​​of , p, and q are determined...

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Abstract

The present invention provides a channel state information feedback method and device, wherein the method includes: the terminal selects N information groups from the configured M information groups; wherein, N and M are positive integers, and N is less than or equal to M; the terminal processes the selected N information groups in a preset manner to obtain the index information of the N information groups and the parameter information of the preset method; wherein, the index information includes: the group index of the N information groups or the N information The index of information in the group; the terminal feeds back index information and parameter information. The present invention solves the problem of feeding back the precoding matrix or selecting the beam based on the strongest path information in the channel in the related art.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel state information feedback method and device. Background technique [0002] In a wireless communication system, the transmitting end and the receiving end generally use multiple antennas to transmit and receive to obtain a higher rate. One principle of Multiple Input Multiple Output (MIMO for short) technology is to use some characteristics of the channel to form multi-layer transmission that matches the characteristics of the channel, so as to effectively improve system performance without increasing bandwidth and power. It is a very promising technology and is widely used in current systems. For example, in Long Term Evolution (LTE for short) and LTE (Long Term Evolution-Advanced for short, LTE A for short) systems, there are multiple multi-antenna technology transmission modes, such as transmission mode 2 to transmission mode 10 . There are many concepts and techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/06H04L1/00
CPCH04B7/0456H04B7/0626H04L1/0026H04W24/10H04L5/0057H04B7/0417H04L5/0048H04B7/04
Inventor 蔡剑兴鲁照华李儒岳陈艺戬肖华华吴昊李永王瑜新
Owner ZTE CORP