为了解决协作通信系统中选择中继算法中断性能分析复杂的问题,提出了一种新的中断分析方法.基于功率受限协作通信系统,考虑Nakagami-m独立同分布信道下一种带有直通链路的选择中继模型,在该模型下推导了中断概率表达式,分析了系统的中断性能,经仿真验证了理论分析的准确性.探讨了优化功率分配,给出特定中继数情况下的功率分配系数.分析结果表明,在该模型下的中断性能与已有模型相比均有所提高. In order to solve the problem of complex performance of selective relay algorithm in cooperative communication system, a new method of interrupt analysis is proposed.According to the power-limited cooperative communication system, In this model, the probability of outage is deduced, the performance of the system is analyzed, and the accuracy of the theoretical analysis is validated by simulation.Analyzing the optimal power allocation and the given number of relays Power distribution coefficient.The analysis results show that the interrupt performance under this model is improved compared with the existing model.