An Early Termination-based Improved Algorithm for Fixed-complexity Sphere Decoder

被引：0
|
作者：
Li, Guanghui [1 ]
Zhang, Xin [1 ]
Lei, Sheng
Xiong, Cong
Yang, Dacheng [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Wireless Theories & Technol Lab, Beijing 100088, Peoples R China
来源：
2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2012年
关键词：
MIMO DETECTION; ARCHITECTURE; REDUCTION; SEARCH;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
The fixed-complexity sphere decoder (FSD) has been proposed to attain the near-optimal performance achieving the same diversity order as the maximum-likelihood decoder (MLD) recently. However, it suffers great redundant computations resulting in high power consumption. In this paper, we conduct an improved algorithm for the original FSD by using early termination (ET). This algorithm (abbreviated as ET-FSD) preserves the advantages of sphere decoder (SD) such as branch pruning and an adaptively updated pruning threshold. We compare the ET-FSD with the original FSD and a lately developed statistical threshold-based FSD (ST-FSD). Simulation results demonstrate that the ET-FSD attains the same performance with a much lower cost than the FSD, and is much more efficient than the ST-FSD in practice. In addition, the statistical threshold-based method can also be used for the ET-FSD (i.e., ST-ET-FSD) to further reduce the complexity.
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页数：6
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