Acquisition Algorithm of Weak GPS Signal

被引：0

作者：

Zhang, Fengguo ^{[1
]}

Zhang, Hongbo ^{[1
,2
]}

机构：

[1] China Res Inst Radiowave Propagat, Qingdao, Peoples R China

[2] Wuhan Univ, Coll Elect Informat, Wuhan, Peoples R China

来源：

CSNC 2011: 2ND CHINA SATELLITE NAVIGATION CONFERENCE, VOLS 1-3 | 2011年

关键词：

GPS; weak signal; acquisition; coherent integration; odd-even branches;

D O I：

暂无

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

With wide applications of GNSS, new technologies and domains bring forward new demands to GNSS weak signal acquisition, where the realization of acquisition and tracking of weak signal is a key process. On the basis of coherent and incoherent integration, signal 25dB lower than normal can be captured by means of phase compensation, time delay correction and odd-even branches, whose carrier frequency can also be refined subsequently. The validity of this algorithm is proved with simulated and observed data. Besides, this article analyzes the effects of phase reversion on signal acquisition. The methods and results may be useful in weak GNSS signal application.

引用

页码：900 / 905

页数：6