基于部分匹配滤波器和FFT的信号捕获方案的设计与实现

摘要

The traditional time-domain and frequency-domain rapid acquisition algorithm for GPS signals are analyzed and list several acquisition designs based on the combination of Partial Matched Filters (PMFs) and Fast Fourier Transform (FFT).These methods limit frequency resolution to a certain scope through different lengths of PMFs and different points of FFT.Finally,the merits and demerits of these methods is compared,and propose a design for the acquisition of GPS signals.%分析了传统的部分匹配滤波器(Partial Matched Filter,PMF)和快速傅里叶变换(Fast Fourier Transform,FFT)相结合的时域频域双并行的高速捕获算法.并在该算法的基础上,对比了几种捕获方案.这些方法采用了不同的PMF长度和不同的FFT点数,旨在一定的频率分辨率范围内,比较各种捕获方法的优缺点,设计并实现一套GPS信号捕获的方案.