Weibull衰落信道下多跳通信系统的性能分析  

Performance of Multihop Communication Systems over Weibull Fading Channels

作　　者：吴联海[1] 贺志强[1] 牛凯[1] 徐文波[1] 林家儒[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2009年第4期25-29,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家重点基础研究发展计划项目(2007CB310604);国家自然科学基金项目(60772108;60702048)

摘　　要：分析了在独立不同分布Weibull衰落信道下配有非再生中继的多跳无线通信系统性能.基于调和几何平均不等式,得到了更易于数学处理的端到端信噪比上界.通过计算上界的矩母函数、概率密度函数和矩等闭式表达式,得到了多跳通信系统的平均端到端信噪比、信道容量和平均误比特率等重要性能界.数值仿真结果表明该界是紧的.End-to-end performance of multihop wireless communication systems with non-regenerative relays operating over independent not necessarily identically distributed Weibull fading channels is presented. Based on the inequality between harmonic and geometric means, the end-to-end signal-to-noise ratio （SNR） is bounded upper. Novel expressions are derived for the moment-generating, probability density, and moment functions of the bound in closed form. Using these statistical results, convenient closed-form bounds are obtained for the average end-to-end SNR, the channel capacity, and the average bit-error probability of multihop wireless communication systems. Numerical results show the tightness of the proposed bounds.

关 键 词：衰落信道 非再生中继 信道容量 平均误比特率 

分 类 号：TN911.6[电子电信—通信与信息系统]