数字匹配滤波器的改进及在伪码捕获中的应用

Application of Advanced DMF in PN acquisition Systems

在扩频通信系统中,PN码的同步问题是其关键问题。数字匹配滤波器(DMF)在扩频通信的PN码同步中得到广泛应用。传统的数字匹配滤波器实现比较复杂,计算量较大。本文在分析了传统匹配滤波器捕获原理的基础上,提出一种改进型的数字匹配滤波器算法。该算法在保持匹配滤波器捕获速度的同时,减少计算量,降低硬件负担。

In spread spectrum communication system,the synchronization of PN code is the key problem.Digital matched filter （DMF） is widely used in PN synchronization in spread spectrum communication.Traditional digital matched filter can achieve more complex,large amount of calculation.Based on the analysis of the theory of capture using traditional matched filter,an improved digital matched filter algorithm has been proposed. This algorithm is not only keeping matched filter capture speed but also reducing computation cost and lowering hardware burden.