多用户跳时超宽带系统串行码捕获性能分析  

The Multiuser Acquisition Performance Analysis with TH UWB System

作　　者：赵为春[1] 刘丹谱[1] 乐光新[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876

出　　处：《电子与信息学报》2005年第8期1269-1273,共5页Journal of Electronics & Information Technology

基　　金：国家863计划(2003AA123240)资助课题

摘　　要：根据超宽带系统多径延迟的特点,该文给出一种易于实现的超宽带跳时串行捕获方法;并在此基础上,着重分析了该系统在多用户环境下的系统捕获性能;最后通过理论推导和数值仿真分析了用户数量、检测概率、虚警概率、判决门限以及平均捕获时间之间的相互制约关系。从结果中看到,随着用户数的增加,检测概率将降低,而判决门限及虚警概率提高,串行捕获时间也将从微秒级增加到毫秒级。This paper gives a serial acquisition method which can be easily implemented in time hopping ultra-wide band system. Based on this method, the acquisition performance in the multiuser environment is analyzed, and the relationships between the detection probability, false alarm probability, detection threshold and average acquisition time are given. From the theoretical analysis and numerical simulation, it is noted that with the increasing of user number, the detection probability will decrease. By contrary, the false alarm and the detection threshold will increase accordingly, and the acquisition time will also increase from μs to ms.

关 键 词：超宽带 跳时 检测概率 虚警概率 判决门限 平均捕获时间 

分 类 号：TN92[电子电信—通信与信息系统] TN914[电子电信—信息与通信工程]