混合衰落信道条件下干扰受限中继传输系统的性能分析  

Performance Analysis of Interference-Limited Relay Transmission System in Mixed Fading Channels

作　　者：马婷婷[1] 许晓明[2] 杨炜伟[3] 沈致军 

机构地区：[1]解放军理工大学通信工程学院学员旅3队,江苏南京210007 [2]解放军理工大学通信工程学院研究生4队 [3]解放军理工大学通信工程学院无线通信系 [4]解放军预备役电磁频谱管理中心,北京100037

出　　处：《军事通信技术》2012年第3期22-27,52,共7页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(61001107);国家科技重大专项资助项目(2010ZX03006-002-04);江苏省自然科学基金资助项目(BK2010101)

摘　　要：在实际无线中继通信中,不同的无线链路很可能受到不同信道衰落的影响。假设源-中继链路经历瑞利衰落和中继-目的链路经历莱斯衰落,文章研究了混合衰落信道条件下两跳变增益放大转发中继系统的端到端性能,其中中继受到多个独立干扰的影响。通过对端到端信干噪比的统计分析,推导了端到端中断概率的精确表达式和误比特性能的近似表达式。蒙特卡络仿真验证了理论分析结果,揭示了莱斯衰落因子和干扰强度对系统性能的影响。In practical wireless relay communication systems, the different channels most probabily suffer from different kinds of fading. Assuming that the channel between the source and the relay is Rayleigh fading channel, and that between the relay and the destination being Ri- cian fading channel, the performance of a dual-hop amplify-and-forward relay system over the mixed fading channels was investigated in the presence of multiple independednt Co-Channel In- terferences （CCIs） at the relay. Through the statistical analysis of the end-to-end signal-to-noise- plus-interference ratio, an exact closed-form expression for the outage probability and an tight approximate expression for the average bit error probability were derived. Monte Carlo simula- tions validate the validity of the analyses and results, and show the effect of the Rician fading fac- tor and interferences on the system performance.

关 键 词：同道干扰 放大转发 混合衰落信道 

分 类 号：TN929.5[电子电信—通信与信息系统]