一种基于数字匹配滤波器的伪码捕获方法

基于匹配滤波器的伪码捕获方法由于其速度优势在直扩通信系统中得到越来越广泛的研究和应用。数字匹配滤波器在基于软件无线电架构的数字通信系统中有很强的实用性。为提高伪码同步性能,提出了一种基于数字匹配滤波器的伪码捕获方法,主要针对载波多普勒频偏较小的应用场合。该方法保留了匹配滤波器捕获方法的速度优势,同时降低了虚警概率,提高了同步精度。该方法已成功应用于某系统。

A Pseudo-code Acquisition Method Based on Digital Matched Filter

The pseudo-code acquisition method based on matched filter has been used and researched more and more widely because of its short acquisition time.In a digital communication system,especially a system based on a SDR（software defined radio） hardware structure,digital matched filter is very useful.In order to acquire better acquisition performance,an acquisition method based on digital matched filter is presented,which is suitable for occasions that the Doppler frequency is low.This method retains the advantage of matched filter in acquisition time,meanwhile,reduces the false alarm probability and has better precision performance.This method has been successfully used in a DS-SS system.