Method, system and device for transmitting encoding indication information and determining precoding matrix

Abstract

The present invention relates to the field of wireless communication technology, in particular to a method, system and device for transmitting coding instruction information and determining a precoding matrix, to solve the problems caused by the current codebook being directly applied to the three-dimensional beamforming / precoding technology. drop problem. The method in the embodiment of the present invention includes: the user equipment determines and sends the first precoding indication information, the second precoding indication information and the third precoding indication information, wherein the indication information corresponds to the precoding matrix, and the precoding matrix is ​​equal to the first component The function matrix of the precoding matrix, the second component precoding matrix and the third component precoding matrix, the first component precoding matrix is ​​a diagonal matrix; the second component precoding matrix is ​​a diagonal matrix; the third component precoding matrix is ​​composed of The beam rotation vector is formed, and the beam rotation vector is equal to the Kronecker product of two vectors; the performance of the three-dimensional beamforming / precoding technology can be improved by adopting the solution of the embodiment of the present invention.

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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