文章基本信息

标题：An Improved BER-Optimal Relay Selection Scheme for Decode-and-Forward Cooperative Networks
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作者：Yuhui Han ; Mingji Yang ; Aili Wang 等
期刊名称：International Journal of Future Generation Communication and Networking
印刷版ISSN：2233-7857
出版年度：2015
卷号：8
期号：1
页码：47-54
DOI：10.14257/ijfgcn.2015.8.1.06
出版社：SERSC
摘要：We are concerned with the relay selection in a decode-and-forward cooperative network to minimize the bit error rate (BER) in a radio cell. This problem can be solved using maximum weighted (MW) matching algorithm, greedy matching algorithm or worst-link-first (WLF) matching algorithm. Among the algorithms, WLF matching algorithm has achieved much attention for its being less complex while the achieved performance is high. In order to further reduce the computational complexity, we propose an improved WLF relay selection scheme, in which relays are selected according to instantaneous channel state information (CSI) and a cooperative threshold is set up to eliminate some unsatisfying candidate relays from the set of alternative candidate relays and thus reduce the amount of calculation. Theory analysis and simulation results both show that the improved WLF relay selection scheme proposed can be easily implemented and achieve almost the same BER performance as that of WLF scheme while the computational complexity is much lower.
关键词：cooperative communication; decode-and-forward; relay selection; worst-link- ; first; bit error rate