Nakagami-m信道下DAF选择中继的中断性能分析  

Outage Performance of Selection Decode-and-Forward Relay Network over Nakagami-m Fading Channels

作　　者：啜钢[1] 刘振兴[2] 王涛[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876 [2]泛网无线通信教育部重点实验室(北京邮电大学),北京100876

出　　处：《北京邮电大学学报》2011年第1期80-84,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家科技重大专项项目(2009ZX03003-003-01)

摘　　要：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.To solve the complicated problem of analysis of outage performance in cooperative communication system,a theoretical analysis method is proposed.A selection relay model with a direct link over independent identically distributed Nakagami-m fading channels is considered based on the power restricted cooperative communication system.An analytical expression of outage probability is derived and the outage performance is analyzed for this model.The optimal power allocation is also investigated and a power allocation factor in a specific relay number is given.Simulations show that the outage performance is evidently improved compared with other selection relay models.The optimal power allocation ia also investigated and a power allocation factor in a specific relay number is given.

关 键 词：协作通信 NAKAGAMI-M信道 译码转发 中断概率 选择中继 优化功率分配 

分 类 号：TN911.22[电子电信—通信与信息系统]