An improved scheme of sphere decoding for MIMO system

被引：0
作者：
Qi, Ji [1 ]
Li, Jianping [1 ]
Cai, Chaoshi [1 ]
机构：
[1] School of Information Engineering, Communication University of China
来源：
Journal of Computational Information Systems | 2013年 / 9卷 / 22期
关键词：
2nE-ES-PL; Correction scheme; MIMO; QR decomposition; SDA;
D O I：
10.12733/jcis7516
中图分类号：
学科分类号：
摘要：
This paper presents a new method to correct the value range of estimative signals for sphere decoding algorithm (SDA) in Multiple-input Multiple-output (MIMO) system. Proposed algorithm is based on QR decomposition for channel matrix and it takes into account the 2-norm expressions of estimative signal in previous layers (2nE-ES-PL) while estimating transmission signals in current layer (TS-CL). Besides, this paper optimizes conventional SDA in system mathematical model (SMM). As the 2nE-ESPL carries the information of TS-CL, we utilize 2nE-ES-PL in TS-CL derivation to avoid more error accumulation. Thereby, the estimative value of signals is corrected by aid of simplification of SMM. This proposed algorithm can search lattice point more accurate without a significant increase in complexity. Simulation results show that the proposed SDA with new correction scheme can achieve nearly 1dB performance gains contrasting to conventional SDA over Rayleigh fading channels. © 2013 Binary Information Press.
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页码：8963 / 8970
页数：7
相关论文
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