GPS接收机信号捕获及常用算法

摘要

Signal capture is the first step of signal processing within GPS receivers. The follow-up processes of signal tracking, observations, positioning and navigation can be start only after signal capture. The time GPS receiver spends on signal capture is longest of all the TTFF, so improving the speed of signal capture is significant for reducing TTFF.%信号捕获是GPS接收机内信号处理的第一步，只有完成了信号捕获，才有可能开始信号跟踪、观测量提取和定位导航等后续的处理过程。GPS接收机花在信号捕获上的时间是所有TTFF耗时中最冗长的一部分，所以提高信号捕获的速度对于缩短TTFF意义重大。