协同通信中双向多中继网络的中断概率分析

The Performance of Outage Probability Analysis in Two-way Multi-relay Cooperative Communication Network

针对频率非选择性瑞利衰落信道条件下,研究了双向多中继协同通信系统的中断概率性能。首先基于模型的信号传输过程分析了系统的信道容量。然后根据单条链路接收信噪比的累积分布函数,推导了系统中断概率的闭合上界表达式;根据接收端釆取最大比合并时的接收信噪比最大,计算了信噪比最大时的概率密度函数,推导了系统中断概率的闭合下界表达式。最后,结合具体的数值仿真对不同参数下的系统中断概率分别进行了详细的分析比较。仿真实验验证了理论推导的结果,并且还表明了双向多中继模型的中断概率优于双向单中继模型。

The outage performance of two-way multi-relay cooperative communication system is investigated in the frequency-nonselective Rayleigh fading channels. First,based on the signal transmission process of model,the channel capacity is analyzed. Second,the outage probability closed-form upper bounder is derived by using cumulative distribution function of single link. Furthermore,based on the maximization of the received SNR,the probability density function is calculated when the maximal ration combining is applied in the received terminal,and a closed-form lower bounder is derived. Finally the outage probabilities of different parameters are respectively analyzed in detail combined with the specific numerical simulation. Simulation results confirm the presented theoretical analysis,and indicate that the two-way multi-relay model outperforms the two-way single-relay model in outage probability.