Method, system and device for transmitting coding indication information and determining pre-coding matrix

Abstract

Embodiments of the invention relate to the technical field of wireless communication and particularly relate to a method, system and device for transmitting coding indication information and determining a pre-coding matrix so as to solve the problem that since in the prior art, a conventional codebook is designed based on horizontal beamforming / precoding, when the codebook is applied directly to the three-dimensional beamforming / precoding technology, the performance is reduced. The method in the embodiments of the invention comprises user equipment determines and sends first pre-coding indication information and second pre-coding indication information to a network side, wherein a first component pre-coding matrix is a block diagonal matrix, and submatrixs on the diagonal line is equal to Kronecker product of two matrixes; and a second component pre-coding matrix is formed by weighted column selection vectors, and the weighted column selection vectors are zero except P nonzero elements, the P being positive integer. The scheme adopted in the embodiments of the invention is capable of improving the performance of the three-dimensional beamforming / precoding technology.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method, system and equipment for transmitting encoding indication information and determining a precoding matrix. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) Rel-8 (version 8) system introduces a closed-loop precoding technology to improve spectrum efficiency. Closed-loop precoding first requires that both the base station and the user equipment store the same set of precoding matrices, which is called a codebook. After estimating the channel information according to the common pilot of the cell, the user equipment selects a precoding matrix from the codebook according to certain criteria. The selected criteria can be maximizing the amount of mutual information, maximizing the output signal-to-interference-noise ratio, and so on. The user equipment feeds back the index of the selected precoding matrix in the codebook...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a method, system and equipment for transmitting encoding instruction information and determining a precoding matrix, to solve the problems existing in the prior art. The current codebook is designed for beamforming / precoding in the horizontal direction and is directly applied to three-dimensional Issues in beamforming / precoding techniques that cause performance degradation

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