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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。
Interrupt probability is one of the most important parameters for evaluating system performance and analyzing system characteristics. This paper analyzes the interruption probability of the transcoding and forwarding (DF) cognitive two-way relay network adopting the TDBC transmission mode, and proposes a definition method based on joint consideration of three timeslot interrupt events. It can be found through analysis that due to the limitation of the interference power of the primary user, the reception SNRs of the secondary user network in the third slot are not independent. On this basis, the closed-form solution of the outage probability of cognitive two-way relay network under the condition of limited interference is deduced. Finally, Monte Carlo simulation verifies this theoretical analysis.