Constructing method of precoding codebook for high level MIMO system

Abstract

The invention provides a constructing method of precoding codebook for high level MIMO system, comprising the steps as follows: (1) searching the codebook with the rank being 1 based on unitary matrix; (2) according to the codebook with the rank being 1, constructing full rank codebook with the rank being M satisfying symbol set restrict and nested structure requirements; (3) constructing the codebooks corresponding to other ranks according to the full rank codebook. The method of the invention can commendably solve the problems that the operation process of searching the codebook in the prior art has complicated calculation and low efficiency, so the method in the invention can fast and efficiently search the codebook; and the constructed codebook has simple structure and is easy to be realized and can achieve excellent performance under various scenes, and improves the throughput and spectrum utilization of the high level MIMO system. Furthermore, the invention can facilitating the possibility of searching the codebook in better performance by changing the construction mode of the codebook, and can improve the whole performance of the construction codebook.

Description

technical field [0001] The present invention relates to a construction technology of a precoding codebook for mobile communication, more precisely, it relates to a construction method of a precoding codebook for a high-order MIMO system, the method is flexible, efficient, and the designed codebook structure It is simple, has low implementation complexity, can achieve good performance in various scenarios, can improve the throughput and spectrum utilization of high-order MIMO systems, and belongs to the technical field of signal coding and processing in mobile communications. Background technique [0002] MIMO technology is a major breakthrough in signal processing technology in the field of wireless communication in recent years. It introduces the degree of freedom of the space dimension, sends different data on the same time-frequency resource, and distinguishes signals through the space domain, thereby greatly improving system capacity and spectrum utilization. [0003] P...

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Problems solved by technology

[0027] In view of this, the object of the present invention is to provide a method for constructing a precoding codebook for a high-order MIMO system, which can well solve the problems of complex calculation and efficiency in the operation process of searching for a codebook existing in the prior art. It can quickly and efficiently find the codebook, and the constructed codebook has a simple structure and is easy to implement. It can achieve good performance in various scenarios and improve the throughput and spectrum utilization of high-order MIMO systems.

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