译码转发认知双向中继网络的中断概率

Outage probability of cognitive decode-and-forward two-way relay networks

中断概率是评估系统性能、分析系统特性的最重要参数之一。该文分析了采用时分广播(TDBC)传输模式的译码转发(DF)认知双向中继网络的中断概率,提出了一种基于联合考虑3个时隙中断事件的定义方法。通过分析可以发现由于主用户对干扰功率的限制,次用户网络在第3个时隙的接收信噪比(SNRs)非独立。在此基础上,推导了在干扰受限的情况下,认知双向中继网络的中断概率的闭式解。最后通过Monte Carlo仿真,验证了该理论分析。

Outage probability is one of the most important measurements for evaluating system performance and analyzing system characteristics. This paper presents an analytical study on the outage probability of cognitive decode-and-forward （DF） two way relay networks for the three time-slot time division broadcast （TDBC） bidirectional protocol. The outage probability is defined by jointly considering outage events in the three time slots. The received signal to noise ratios （SNRs） in the third time slot depend on the interference power constraint to the primary users. These are used to derive a closed form outage probability expression. The theoretical analysis is validated through Monte Carlo simulations.