复合衰落信道下分布式MIMO系统下行中断概率分析  

Downlink outage probability analysis of distributed MIMO systems over a composite fading channel

作　　者：彭文杰[1] 李岳衡[1] 居美艳[1] 黄平[1] 谭国平 

机构地区：[1]河海大学计算机与信息学院,江苏南京211100

出　　处：《通信学报》2014年第6期161-168,共8页Journal on Communications

基　　金：江苏省教育厅高校科研成果产业化推进基金资助项目(JHB2012-4)~~

摘　　要：针对复合衰落信道模型下分布式MIMO系统下行中断概率问题,首先建立了一个综合考虑Nakagami-m衰落、路径损耗和阴影衰落的复合衰落信道模型;然后针对存在中心基站的分布式MIMO系统,提出了一种更符合实际应用环境的准均匀小区移动台分布模型;接着利用矩生成函数、Gauss-Hermite积分公式和Simpson积分公式等数学手段推导了任意移动台分布下、单小区内系统平均下行中断概率闭合表达式;最后将准均匀移动台分布模型应用到该中断概率闭合表达式,并通过MATLAB仿真证明了所推导得到的闭合表达式及小区分布模型的合理性。The downlink outage probability of the distributed MIMO systems over a composite channel was discussed. Firstly, a composite fading channel was established by integrating Nakagami-m fading, path loss, and lognormal shad- owing. According to the distributed MIMO system with a center-located base station （BS）, a quasi-uniform mobile station （MS） distribution model was proposed, which is more suitable for a real communication environment. Next, an approxi- mate analytical expression of average downlink outage probability of the system with arbitrary MS distribution was de- rived through using mathematical methods such as moment generating function, Gauss-Hermite integral, composite Simpson＇s rule and so on. Finally, by taking the proposed MS distribution model into account, the derived closed-form outage probability expression and the MS distribution were proved to be correct and reasonable by computer simulation results.

关 键 词：分布式MIMO系统 复合衰落信道 中断概率 移动台分布 

分 类 号：TN929.5[电子电信—通信与信息系统]