超宽带室内多径信道特性的最优化分析  

Analysis of optimization for properties of UWB indoor multipath channel

作　　者：扈罗全[1] 朱洪波[1] 

机构地区：[1]南京邮电大学无线通信与电磁兼容实验室,江苏南京210003

出　　处：《通信学报》2005年第10期143-148,共6页Journal on Communications

基　　金：国家自然科学重点基金资助项目(No.60432040);江苏省自然科学基金项目(No.BK2002031);教育部新世纪优秀人才支持计划(No.NCET-04-0519);国家自然科学基金资助项目(No.60572024)

摘　　要：分析超宽带(UWB)信道特性并建立合适的信道模型是UWB无线通信研究的重要内容。采用最优化方法分析UWB室内多径信道的特性,并讨论构建UWB信道的数学模型。在此基础上通过引入随机桥过程假设和概率选择性假设,使用最优化方法建立UWB信道冲激响应的有约束布朗桥模型(BBBM);分析BBBM模型有效随机路径判据,给出在最优化框架基础上的建模算法;使用BBBM模型对UWB信道进行仿真分析,得到的UWB信道特性和用实验测量与UTD方法得到的信道特性非常相似,特征参量的取值与实际情况相符。Methods of optimization were proposed for analyzing the properties of UWB indoor multipath channels, and a mathematical model for UWB channel modeling was discussed. Assumptions of stochastic bridge process and probabilistic choice were adopted. A UWB channel impulse response based on bounded Brownian bridge model （BBBM） was constructed. The judgments of effective random paths, and modeling algorithms based on the methods of optimization were presented. The results of simulation for UWB channels demonstrated that the BBBM could obtain the similar properties to the ones of experiments and UTD methods, some characteristic parameters corresponded well with the experimental values.

关 键 词：无线通信 超宽带 最优化方法 多径信道 信道特性 

分 类 号：TN929.5[电子电信—通信与信息系统]