Nakagami-m信道下双向中继选择的中断概率分析

The Outage Probability Analysis of Two-Way Relay Selection in Nakagami-m Channels

在并行多双向中继通信系统中,提出了一种低复杂度的中断概率最优的中继选择策略,各个中继只需利用本地信道状态信息(CSI)进行分布式的选择.在Nakagami-m信道下分析了所提策略的中断概率性能,推导了系统中断概率的闭合表达式.仿真结果显示,该中继选择策略的中断概率性能在2种信道情况下均优于其他中继选择算法,且随着中继数的增加,所提策略可充分利用多中继分集提升系统中断概率性能.

In the parallel multiple two-way relays communication systems, an outage-optimal relay selection scheme with low complexity is proposed, which is performed with only local channel state information （CSI） in a distributed way. In the Nakagami-m channel, the outage probability performance of the proposed scheme is analyzed, and the closed expression of the system outage probability is also derived. Simulation results show that, the proposed relay selection scheme can outperform other relay selection algorithms under two channel conditions, and the outage probability of the proposed scheme improves with the increase of the number of relays, since the multi-relay diversity can be fully utilized.