微弱GPS信号差分快速捕获算法  

Differential rapid acquisition algorithm of weak GPS signal

作　　者：史彦芳[1] 刘静[1] 马娟[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710129

出　　处：《电子设计工程》2012年第16期130-133,共4页Electronic Design Engineering

摘　　要：微弱GPS信号的捕获算法,是高灵敏度GPS接收机实用化的关键技术,但通常有效提高GPS信号捕获灵敏度的信号累积技术会消耗大量时间。通过对当前主要弱信号累积技术和捕获算法的分析,在总结其利弊的基础上提出了利用差分累积的微弱GPS信号快速捕获算法,并通过仿真验证了算法性能,利用实际采样数据证实了算法的有效性。Weak GPS signal acquisition algorithm is the practical key technologies of high sensitivity GPS receiver, but usually the signal accumulation technology of improving GPS signal acquisition sensitivity will consume a lot of time. Through the analysis of the current weak signal accumulation technology and capturing algorithm, the paper put forward the fast acquisition algorithm of weak GPS signal by using differential accumulation on the basis of summing up its advantages and disadvantages. The algorithm is verified through simulation performance and the actual sampling data has confirmed the validity of the algorithm.

关 键 词：GPS弱信号 捕获 差分累积 

分 类 号：P228.4[天文地球—大地测量学与测量工程]