Channel quantization information acquisition method, terminal, base station, and system

Abstract

The invention provides a channel quantization information acquisition method, a terminal, a base station, and a system. The method comprises the following steps: according to a Channel State IndicatorReference Signal (CSI-RS) sent by a sending end, acquiring sequences of channels between a receiving end and the sending end, and acquiring codon matrixes according to the sequences and codon spaces;acquiring weight amplitude information corresponding to the codon matrixes, wherein the weight amplitude information comprises diagonal matrixes, the number of which is identical to the number of thesequences, and is used for amplitude adjustments on rows in the codon matrixes; and feeding the weight amplitude information and indication information corresponding to codon matrixes back to the sending end, so that the sending end can acquire a precoding matrix corresponding to the channels between the receiving end and the sending end according to the indication information, the weight amplitude information and a first matrix, and use the precoding matrix as channel quantization information. The method, the terminal, the base station and the system provided by the invention has the advantages that module values of weight values in the precoding matrix are no more identical due to the introduction of the weight amplitude information, so that the system performance can be improved, and the advantages of the dimension reduction feedback technology can be fully exerted.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a method for acquiring channel quantization information, a terminal, a base station and a system. Background technique [0002] In a wireless communication system, the transmitting end uses transmit precoding technology to send data according to the channel information fed back by the receiving end, which can greatly improve the transmission performance of the channel. Usually, the receiving end performs quantized feedback of channel information based on a codebook. However, in FD-MIMO, which needs to support both traditional horizontal beamforming and vertical beamforming, the number of antennas is greatly increased, which makes the dimension of the precoding matrix, that is, the channel quantization information, increase rapidly. Therefore, under the condition that the quantization precision requirement of the channel information remains unchanged, the o...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a channel quantization information acquisition method, terminal, base station and system to overcome the problem that the codebooks used by the 4-antenna and 8-antenna protocols in the prior art are all constant modulus codebooks, that is, each weight in the precoding matrix The values ​​are all the same modulus value, which directly leads to poor system performance and cannot give full play to the advantages of dimensionality reduction feedback technology.

Images