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中国科学院大学学报 ›› 2014, Vol. 31 ›› Issue (2): 243-248.DOI: 10.7523/jssn.2095-6134.2014.02.015

• 信息与电子科学 • 上一篇    下一篇

延时信道信息下一种新的AF中继选择算法

叶帆, 邱玲   

  1. 中国科学技术大学个人通信与扩频实验室, 合肥 230027
  • 收稿日期:2013-01-25 修回日期:2013-05-28 发布日期:2014-03-15
  • 通讯作者: 邱玲,E-mail:lqiu@ustc.edu.cn
  • 基金资助:

    国家科技重大专项(2010ZX03002-003-01)资助

An AF partial relay selection strategy with feedback delay

YE Fan, QIU Ling   

  1. Personal Communication Networks and Spread Spectrum Laboratory, University of Science and Technology of China, Hefei 230027, China
  • Received:2013-01-25 Revised:2013-05-28 Published:2014-03-15

摘要:

提出单源、多中继、单目的节点的放大转发中继系统中一种新的中继选择算法. 考虑源端通过反馈获得第一跳链路过时(延时)的瞬时信道状态信息,推导了中继选择方案的中断概率闭式表达,并基于该表达式,以最小化条件中断概率为目标,提出利用信道相关性信息辅助的中继选择新方案. 仿真验证了新方案相比于传统方案有明显的性能增益.

关键词: 中继选择, 放大转发, 过时信道信息, 信道相关系数, 中断概率

Abstract:

We present a novel relay selection algorithm in amplify-and-forward relay network with one source node, one destination, and multiple relay nodes. When the channel state information (CSI) of the first hop used for selection is outdated, closed-form expression for the system outage probability is derived. Then we propose a relay selection algorithm with assistance of the channel correlation coefficient, which aims at minimizing the system outage probability. The numerical simulation results show that the proposed strategy brings significant performance gain compared to the conventional partial relay selection strategy.

Key words: relay selection, amplify-and-forward, outdated channel state information, channel correlation, outage probability

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