瑞利衰落信道下基于DMF的伪码捕获性能分析  

Analysis on Acquisition Performance of PN Code Based on DMF over Rayleigh Fading Channels

作　　者：张爱民[1] 韩方景[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院

出　　处：《通信对抗》2008年第4期13-15,共3页Communication Countermeasures

基　　金：航空科学基金(20060112005)

摘　　要：基于数字匹配滤波器（DMF）的PN码捕获电路具有较快的捕获速度，因此在扩频系统中得到广泛的应用，为了在瑞利衰落信道下进一步提高捕获性能，对影响捕获性能的虚警概率和检测概率进行了推导和分析，进而计算出了平均捕获时间，并且作出了仿真和分析，为改善瑞利衰落信道下捕获性能提供了解决思路和理论依据。The PN Code acquisition circuit based on DMF can accelerate the process of PN code acquisition. so it has more and more application in DSSS. In order to improve further acquisition performance over rayleigh fading channels. The detection probability and false alarm probability which effect acquisition performance of PN code are derived and analysized at first, and then obtain the mean acquisition time. Finally the result of simulation and analysis are given. Therefore the research of this paper provide the solution and theory basis for the better acquisition performance over rayleigh fading channels.

关 键 词：瑞利衰落 数字匹配滤波 检测概率 虚警概率 平均捕获时间 

分 类 号：TN911.22[电子电信—通信与信息系统] TN914.42[电子电信—信息与通信工程]