双向多中继协同通信系统的性能分析

摘要

针对频率非选择性瑞利衰落信道，研究了双向多中继协同通信模型的系统性能。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；进一步在MPSK调制方式下，通过计算在高信噪比条件下的矩母函数，推导了平均误码率的闭合表达式。仿真结果验证了理论推导的正确性，并且表明双向多中继模型的中断概率和平均误码率两项性能指标都优于双向单中继模型。%The performance of two-way multi-relay cooperative communication system is investigated in the frequency-nonselective Rayleigh fading channels. Firstly, based on the signal transmission process of mod-el,the channel capacity is analyzed. Secondly,the outage probability closed-form upper bounder is derived by using cumulative distribution function. Furthermore,a closed-form expression of the average symbol er-ror rate is derived for MPSK modulation,by using the moment generation function. Simulation results con-firm the presented theoretical analysis,and indicate that the two-way multi-relay model outperforms the two-way single-relay model both in outage probability and average symbol error rate.