Channel status information feeding back method and wireless transmitting/receiving device

Abstract

The invention relates to the wireless communication field and discloses a state information feedback method of channels and a wireless transceiver; in the invention, at least two codebooks generated according to different rules are used. A receiving end is used for selecting a pre-coding matrix combination that is most suitable for the present states of the channels and sending the pre-coding matrix combination with limited bit to a sending end, therefore, the pre-coding treating performance can be improved without adding the amount of feedback information, and storing space needed for storing the codebooks can be saved. A main codebook and an assistant codebook can be used; the assistant codebook can be regarded as a disturbance added on the basis of the main codebook; wherein, the main codebook can be generated and chosen according to the prior technical scheme, and the assistant codebook can be generated based on Fourier matrix or extended rotation matrix.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to channel state information feedback technology. Background technique [0002] At present, the application of multiple-input multiple-output (Multi-Input Multi-Output, referred to as "MIMO") technology in wireless communication systems has attracted more and more attention. Whether it is from the perspective of increasing system capacity or improving system performance, MIMO is It has irreplaceable advantages. MIMO is mainly divided into two categories, one is space diversity technology aimed at maximizing diversity gain, and the other is space division multiplexing technology aimed at maximizing data rate. [0003] A system based on MIMO space-division multiplexing technology can significantly improve the spectrum utilization of the system by sending multiple independent data streams at the same time, but the space-division multiplexing system is very sensitive to poor chann...

AI Technical Summary

Problems solved by technology

However, the inventors of the present invention have found that since a linear receiver with low complexity is often used in practice, the actual achievable throughput has a certain loss relative to the capacity of the information theory, that is, the receiving end uses the estimated channel matrix The codewords selected with certain performance criteria seem to be not accurate enough for the optimal codewords, which leads to a certain performance loss

In addition, each codeword in the current codebook is a large precoding matrix, so it occupies a large storage space

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