A Sphere Detection Based Adaptive MIMO Detection Algorithm for LTE-A System

Xuanli Wu, Lukuan Sun, Mingxin Luo

1School of Electronics and Information Engineering Harbin Institute of Technology Harbin, China 2Department of Electrical and Computer Engineering McGill University Montreal, Canada.
School of Electronics and Information Engineering Harbin Institute of Technology Harbin, China.

DOI: 10.4236/cn.2013.52B005                

Abstract

An adaptive MIMO detection algorithm for LTE-A system which is based on sphere detection is proposed in this paper. The proposed algorithm uses M-algorithm for reference to remove unreliable constellation candidates before search, and the number of constellation reservation is adaptively adjusted according to SNR. Simulations of LTE-A downlink show that the BER performance of the proposed detection algorithm is nearly the same as maximum likelihood (ML) detection algorithm. However, the complexity is reduced by about 30% compared with full constellation sphere detection.

Keywords

Adaptive MIMO Detection; Sphere Detection; M-algorithm; LTE-A System

Conflicts of Interest

The authors declare no conflicts of interest.

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