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Channel information feedback method and device, data transmission method and device

A technology for channel information feedback and channel information, which is applied in the fields of channel information feedback methods and devices, data transmission methods and devices, and can solve the problems of poor codebook feedback accuracy and the like

Active Publication Date: 2019-04-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Aiming at the problem of relatively poor codebook feedback accuracy in the related art, the present invention provides a channel information feedback method and device, a data transmission method and device, to at least solve this problem

Method used

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  • Channel information feedback method and device, data transmission method and device
  • Channel information feedback method and device, data transmission method and device
  • Channel information feedback method and device, data transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0224] This embodiment provides a channel information feedback method in a multi-antenna system, and the method includes the following steps S502 and S504.

[0225] Step S502: The receiving end sets multiple codebooks, including a basic codebook and at least one optimized codebook.

[0226] Step S504: The receiving end selects corresponding codewords from the plurality of codebooks according to the current channel information, and indicates the sequence number or precoding matrix of the selected codewords in the respective codebooks (Precoding Matrix Indicator, referred to as PMI) is fed back to the transmitter.

[0227] Corresponding to the above receiving end, this embodiment also provides a channel information feedback method in a multi-planet system, the method includes the following steps S602 and S604.

[0228] Step S602: The transmitter sets multiple codebooks, including a basic codebook and an optimized codebook;

[0229] Step S604: The transmitting end finds the cor...

Embodiment 2

[0240] This embodiment provides a channel information feedback method in a multi-antenna system, and the method includes the following steps S702 and S704.

[0241] Step S702: The transmitting end and the receiving end construct a new codebook based on multiple codebooks.

[0242] Step S704: The receiving end selects a corresponding codeword from the new codebook according to the current channel information, and indicates the sequence number or precoding matrix of the selected codeword in the new codebook (Precoding Matrix Indicator, referred to as PMI) is fed back to the transmitter.

[0243] Preferably, the plurality of codebooks include a basic codebook and at least one optimized codebook.

[0244] Corresponding to the receiving end in the above steps, this embodiment also provides a channel information feedback method in a multi-antenna system, the method includes the following steps S802 and S804.

[0245] Step S802: The transmitting end and the receiving end construct ...

Embodiment 3

[0259] This embodiment provides a channel information (CSI) feedback method in a multi-antenna (MIMO) system, and the method includes the following two implementation methods:

[0260] method one:

[0261] 1) Multiple codebooks are set at both the transmitting end and the receiving end, including a basic codebook and at least one optimized codebook.

[0262] 2) The receiving end selects corresponding codewords from the multiple codebooks according to the current channel information, and feeds back the serial number or precoding matrix indicator (PMI) of the selected codewords in the respective codebooks to the transmitting end.

[0263] 3) The transmitting end finds the corresponding codeword from the corresponding codebook according to the multiple codeword serial numbers or precoding matrix (PMI) sent by the receiving end, and obtains the codeword representing the current channel information according to the multiple codewords, for data transmission.

[0264] Method 2:

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Abstract

The invention discloses a channel information feedback method, a channel information feedback device, a data transmission method and a data transmission device. The channel information feedback method comprises the following steps of determining codon corresponding to channel information according to the channel information and a preset codebook which comprises a first codebook and at least one second codebook by using a receiving end; and feeding back at least one of the codon, the index of the codon or information for determining the codon and the index of the codon to a transmitting end by using the receiving end. By using the channel information feedback method and the channel information feedback device, the channel information feedback accuracy is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a channel information feedback method and device, and a data transmission method and device. Background technique [0002] In wireless communication, if both the transmitting end and the receiving end use multiple antennas, spatial multiplexing can be used to obtain a higher rate. Compared with the general spatial multiplexing method, an enhanced technology is that the receiving end feeds back the channel information to the transmitting end, and the transmitting end uses some transmission precoding techniques according to the obtained channel information, which can greatly improve the transmission performance. [0003] In the plan of the Long Term Evolution (LTE for short) system, the feedback of channel information mainly uses a relatively simple single codebook feedback method, while the multiple input multiple output (Multiple Input Multiple Output, short for MIMO) transmiss...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06
Inventor 弓宇宏孙云锋陈艺戬张峻峰
Owner ZTE CORP