分布式天线系统中信道时延扩展的统计分析  

Statistical analysis of delay spread in distributed antenna systems

作　　者：石海东 胡冬梅 王晓东[1] 

机构地区：[1]海军潜艇学院航海观通系,山东青岛266042

出　　处：《山东大学学报（工学版）》2012年第1期133-142,共10页Journal of Shandong University（Engineering Science）

摘　　要：从理论上分析了复合衰落下两支路分布式天线系统信道时延扩展的统计特性,同时作为特例,分析了仅考虑单一尺度衰落时的相关特性。最后在城市环境典型参数下,基于蒙特卡洛仿真对所导出的解析结果进行了验证,仿真结果验证了解析结果的正确性。由于均方根时延扩展的统计特性所依赖的参数多,在实际应用,必须按照实际场景固定某些参数来考察某一参数的影响。The statistical properties of delay spread in a two-path distributed antenna system were analyzed,of which each path was characterized by Rayleigh fading and lognormal shadowing.As a special case,the statistical properties of delay spread in single scale alone fading environments were also obtained.Finally,a Monte Carlo simulation model was constructed using the channel parameters under typical urban environments,and the derived expressions were validated by simulation results.Because the root mean square of delay spread depended on many parameters,the effect of one specified parameter was considered under the condition of other parameters being fixed according to the practical scenarios.

关 键 词：分布式天线系统 复合衰落 均方根时延扩展 概率密度函数 累积分布函数 均值 标准偏差 

分 类 号：TN911.1[电子电信—通信与信息系统] TN915.0[电子电信—信息与通信工程]