大地测量与地球动力学2011，Vol.31Issue(1)：147-151,5.
GPS软件接收机捕获方法研究
ACQUISITION ALGORITHM FOR GPS SOFTWARE RECEIVER
摘要
Abstract
To solve the IF signal capture problems in the software GPS receiver, first the parallel code acquisition algorithm based on FFT is used to achieve the coarse frequency of IF signal and obtain the fine frequency based on the use of FFT in frequency domain analysis. The acquisition decision is dependent on the ratio of the maximum peak and the sub-peak ratio, at the same time, the specific steps are presented. Through the analysis of the real GPS IF signal, experimental results show that the FFT-based GPS signal aequsition and FFT frequency-domain method are very effective to obtain the fine frequency, this is, can capture quickly and accurately, so to meet the requirements of GPS software receiver.关键词
GPS/中频信号/频域/FFT/软件接收机Key words
GPS/ signal/ IF frequency/ FFT/ softwarereceiver分类
天文与地球科学引用本文复制引用
罗和平,邱蕾,曾祥新..GPS软件接收机捕获方法研究[J].大地测量与地球动力学,2011,31(1):147-151,5.基金项目
地理空间信息工程国家测绘局重点实验室基金(200957) （200957）
