Method and equipment for generating codebook and sending and feeding back information

Abstract

The invention discloses a method and equipment for generating a codebook and sending and feeding back information. The method for sending the information comprises the following steps: after the codebook is generated, receiving signals containing codebook index information and extracting the codebook index information; according to the codebook index information, selecting corresponding precoding matrixes from the codebook or subsets of the codebook; precoding data to be sent according to the precoding matrixes; and sending the precoded signals to a receiving end. The method of feeding back channel status information comprises the following steps: receiving information sent by a sending end; estimating channel information on the basis of the received information; selecting the corresponding precoding matrixes from the codebook or the subsets of the codebook according to the channel information,; and sending signals containing codebook index information corresponding to the selected precoding matrixes. By the invention, dual-precoding matrix index feedback can be supported, the quantization accuracy of small-interval dual-polarization array channels can be improved, and the quantization accuracy of small-interval linear array channels can be enhanced.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to methods and equipment for generating codebooks, sending information, and feeding back. Background technique [0002] At present, the multi-antenna technology of the physical layer has become one of the key technologies of the next generation wireless communication system. Multi-antenna technology has many advantages. For example, the multiplexing gain of multiple antennas can be used to improve the throughput of the system, and the diversity gain of multiple antennas can be used to improve system performance, or the directional gain of antennas can be used to distinguish receiving terminals and eliminate reception. Interference between terminals and so on. [0003] The MIMO (Multiple-Input Multiple-Output) system uses multiple transmitting and receiving antennas to obtain rate, diversity and array gain by joint processing of signals in the space, time and frequency domains. ...

AI Technical Summary

Problems solved by technology

The disadvantage of the existing technology is that the 4-antenna codebook based on Householder transform designed for single-user MIMO as the main optimization scenario will not be able to meet the requirements of these advanced transmission technologies for channel quantization accuracy

[0029] In addition, the 4-antenna codebook based on the Householder transform is designed for small-pitch linear array scenarios and low spatial correlation scenarios. For the commonly used small-pitch dual-polarization array scenarios, the spatial channel quantization accuracy is not high, and dual PMI feedback is not supported. (In dual PMI feedback, the first PMI is always 0)

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