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

被引：0

作者：

XIE Gang ^{[1
]}

LIU YuanAn ^{[2
]}

GAO JinChun ^{[2
]}

LI XingZheng ^{[3
]}

机构：

[1] Beijing Key Laboratory of Network System Architecture and Convergence, Beijing University of Posts and Telecommunications

[2] School of Electronic Engineering, Beijing University of Posts and Telecommunications

[3] Division of Research, China Mobile Group Design Institute Co.

来源：

ScienceChina(InformationSciences) | 2013年 / 56卷 / 02期

基金：

中国国家自然科学基金;

关键词：

relay selection; decode-and-forward relay; cooperative communication; wireless relay system;

D O I：

暂无

中图分类号：

TN925 [无线电中继通信、微波通信];

学科分类号：

080402 ; 080904 ; 0810 ; 081001 ;

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.

引用

页码：41 / 48

页数：8

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