Methods for transmitting coding indication information and determining pre-coding matrix, system and equipment

Abstract

The invention relates to the technical field of wireless communication and particularly a method for transmitting coding indication information and a method for determining a pre-coding matrix, a system and equipment. The objective of the invention is to solve the problem of performance reduction caused by a situation in which a codebook is directly applied to three-dimensional wave beam shaping/pre-coding technologies at present. The method for transmitting the coding indication information comprises the step that user equipment determines and transmits first pre-coding indication information, second pre-coding indication information and third pre-coding indication information, wherein the indication information is corresponding to the pre-coding matrix, wherein the pre-coding matrix is equal to a function matrix of a first component pre-coding matrix, a second component pre-coding matrix and a third component pre-coding matrix, wherein the first component pre-coding matrix is a diagonal matrix, the second component pre-coding matrix is a diagonal matrix, the third component pre-coding matrix is composed of a wave beam rotating vector, wherein the beam rotation vector is equal to the Kronecker product of two vectors. With the method for transmitting the indication information, the method for determining the pre-coding matrix, the system and the equipment of the invention adopted, the performance of the three-dimensional wave beam shaping/pre-coding technologies can be improved.

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) Re1-8 (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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