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

Abstract

The embodiment of the present invention relates to the field of wireless communication technology, and in particular to a method, system and device for transmitting encoding instruction information and determining a precoding matrix, which is used to solve the problems existing in the prior art that the current codebook is aimed at horizontal beamforming / Precoding design, directly applied to 3D beamforming / precoding technology will lead to performance degradation. The method in the embodiment of the present invention includes: the user equipment determines and sends the first precoding indication information and the second precoding indication information, the precoding matrix is ​​equal to the function matrix of the first component precoding matrix and the second component precoding matrix, and the first The sub-matrix on the diagonal of the component precoding matrix is ​​the Kronecker product of two diagonal matrices; the second component precoding matrix is ​​composed of a beam rotation vector, and the beam rotation vector is equal to the Kronecker product of the two vectors. The performance of the three-dimensional beamforming / precoding technology can be improved by adopting the embodiments 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) 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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