延时信道信息下一种新的AF中继选择算法

An AF partial relay selection strategy with feedback delay

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.

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 When the channel state information （CSI） of the first hop used for selection is outdated, closed-form expression for the system outage probability is derived.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.