Sort-based relay selection algorithm for decode-and-forward relay system

被引：0
作者：
Gang Xie
YuanAn Liu
JinChun Gao
XingZheng Li
机构：
[1] Beijing University of Posts and Telecommunications,Beijing Key Laboratory of Network System Architecture and Convergence
[2] Beijing University of Posts and Telecommunications,School of Electronic Engineering
[3] China Mobile Group Design Institute Co.,Division of Research
[4] Ltd,undefined
来源：
Science China Information Sciences | 2013年 / 56卷
关键词：
relay selection; decode-and-forward relay; cooperative communication; wireless relay system;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this paper, a sort-based relay selection algorithm is proposed for decode-and-forward wireless relay systems. The proposed algorithm can reduce computational complexity and system overhead in the relay selection for practical decode-and-forward wireless relay systems with multiple sources and multiple relays. This would be a very important improvement. Firstly, the sufficient and necessary conditions for a relay to be feasible to a source are derived. By adopting relay transmission via its feasible relay, the source can improve channel capacity compared to direct transmission. Then, a sort-based relay selection algorithm is proposed based on the sufficient and necessary conditions. In the proposed algorithm, each relay makes decision on its feasibility individually, but the final source-relay paring decision is made in a centralized manner. Simulation results show that the proposed algorithm can provide considerable system performance improvement over the existing algorithm. Especially at low signal-to-noise (SNR) region, the performance of the proposed algorithm almost reaches the optimal one.
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页码：1 / 8
页数：7
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