mimo signal detection method and detector based on k-best algorithm

Abstract

The invention discloses an MIMO (Multiple Input Multiple Output) signal detection method and a detector on the basis of a K-Best algorithm. The method comprises the following steps of: according to an antenna number and a modulation mode which are designated by a user, configuring a detection layer number; acquiring a product of an upper triangular matrix R of a channel transfer matrix H, which is subjected to QR decomposition, and a conjugate transpose matrix of a unitary matrix and a receiving vector y; expanding all constellation points on a p=Mth layer and PC (Fiber Channel) paths on a p=M-1th layer in parallel and generating two groups of candidate paths in an interweaving mode to carry out parallel processing; expanding the candidate paths in a parallel mode as required to find out K survivor paths and K-2 abandon paths on a pth layer; processing the survivor paths on each detection layer to obtain survivor path outputs and carrying out reusing processing on the abandon paths; and carrying out log-likelihood processing on the K survivor paths and the K-2 abandon paths. The invention can solve the problems of low throughput, poor flexibility, poor detection performance, difficulty in implementing a hardware structure and the like.

Description

technical field [0001] The invention relates to the technical field of MIMO communication, in particular to a K-Best algorithm-based MIMO signal detection method and a detector. Background technique [0002] A Multiple Input Multiple Output (MIMO) technology can greatly improve the capacity and reliability of a wireless communication system without increasing power, time and spectrum bandwidth. Among them, the spatial multiplexing mode of MIMO technology can make the transmission rate of the system increase linearly with the number of antennas [1]. This huge theoretical breakthrough of MIMO technology has aroused great interest in academia and industry, and produced many research results. MIMO technology is also adopted by more and more new generation wireless communication standards. [0003] Although MIMO technology has the above huge advantages, it is also widely used in various standards. However, the computational complexity of implementing MIMO detection technology ...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a MIMO signal detection method and detector based on the K-Best algorithm, which can solve the problems of low throughput, poor flexibility, poor detection performance and hardware problems of traditional detection devices. The structure is not easy to realize, etc.

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