GPS精频捕获算法的实现

Design of GPS Acquisition Algorithm with Fine Frequency Estimation

为了提高GPS软件接收机信号捕获的载波频率分辨率,在基于FFT的快速并行码捕获算法中,利用输入信号在短时间内两个不同时刻的相位差来获取更高的频率分辨率。实验结果表明,该算法在不增加捕获时间的基础上确实提高了载波频率分辨率,捕获快速准确,为后续信号的跟踪环节提供了有利条件。

In order to improve the carrier frequency resolution of GPS software receiver, in a fast parallel tracking algorithm based on FFT, through a phase relationship in a short time to improve the frequency resolution. The simulation results show that this method does increase the carrier frequency resolution with not adding acquisition time.lt is quick and accurate and provides favorable conditions for the follow-up tracking loop.