高动态环境下扩频通信系统信号快速捕获的研究  

Study of Signal's Rapid Acquisition for Spread Spectrum Communication System in High Dynamic Circumstances

作　　者：徐晓艳[1] 李署坚[1] 邵定蓉[1] 柏廷广[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《遥测遥控》2005年第2期22-27,共6页Journal of Telemetry,Tracking and Command

摘　　要：文中分析时延、多普勒频移对扩频信号相关接收的影响 ,并利用 MATLAB进行仿真 ,在此基础上给出一种高动态环境下扩频通信系统信号二维搜索方法 ,提出采用折叠匹配滤波实现伪码快速捕获。电路仿真结果表明此方法实现了长伪码 ( 1 0 2 3码长 )在高动态环境下的快速捕获 (≤ 0 .2 s)In this paper,the effect of Delay and Doppler shift on the spread specturm signal's acquisition is analyzed and simulated using MATLAB.Furthermore,a signal's two-dimensional researching method in spread spectrum communication system under high dynamic circumstances is presented,and a rapid acquisition method of PN code using folder filter is put forward.The simulation result shows that this method implements long PN code(1023) spread spectrum signal's rapid acquisition under high dynamic circumstances and the hardware resource is reasonable configuration.

关 键 词：扩频通信 快速捕获 二维搜索 折叠滤波 

分 类 号：TN914[电子电信—通信与信息系统]