干扰条件下放大转发策略性能分析  

Performance Analysis of Amplify-and-Forward Protocol with Interference

作　　者：龙彦汕[1] 高媛媛[2] 房务将[3] 徐坤[4] 江天明[3] 

机构地区：[1]解放军理工大学通信工程学院研究生2队,江苏南京210007 [2]解放军理工大学通信工程学院 [3]解放军理工大学通信工程学院研究生3队 [4]解放军理工大学通信工程学院研究生4队

出　　处：《军事通信技术》2013年第2期28-33,72,共7页Journal of Military Communications Technology

摘　　要：对单音干扰下变增益放大转发协议进行研究,并考虑不同干扰位置和干扰强度对系统性能的影响。分析了在瑞利衰落信道中,中继受干扰和目的端受干扰两种情况下协同通信系统的性能。推导得到两种受单音干扰的系统模型的中断概率下界及其有限信噪比分集复用折中(DMT)的数学表达式。结果表明,中继受到干扰时系统性能要好于目的端受到干扰,而且目的端对干扰强度的变化更敏感。蒙特卡洛仿真验证了理论分析结果,并表明有限信噪比的分集复用折中比传统的高信噪比定义下的分集复用折中更具有实际意义。The performance analysis of variable-gain amplify-and-forward cooperative com- munications with interference over Rayleigh fading channels was researched, in which either the relay or destination is subjected to single interference. The impact of the location and intensity of the interference on the system performance was also considered. The mathematical expressions for the lower bounds on the outage probability and their corresponding finite-SNR Diversity-and- Multiplexing Tradeoff（DMT） for the two given model were presented and discussed. The results suggest that the performance of system with interference at relay is better than that at destina- tion; and that the destination is more sensitive to interference. Monte Carlo simulations validate the validity of the theoretical analysis and show that the finite-SNR DMT is more practical than the asymptotic one which is defined at high SNR.

关 键 词：单音干扰 变增益放大转发 中断概率 有限信噪比 分集复用折中 

分 类 号：TN929.5[电子电信—通信与信息系统]