Fast fine acquisition algorithm of GPS receiver aided by INS information

被引：5
|
作者：
Zhu, Lufeng [1 ]
Zhang, Chunxi [1 ]
Ma, Zhiqiang [1 ]
机构：
[1] Beihang Univ, Sch Instrumentat & Optoelect Engn, Beijing 100191, Peoples R China
来源：
JOURNAL OF SYSTEMS ENGINEERING AND ELECTRONICS | 2011年 / 22卷 / 02期
关键词：
inertial navigation system (INS) aid; spectrum zooming; acquisition time; global position system (GPS) receiver;
D O I：
10.3969/j.issn.1004-4132.2011.02.017
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Acquisition time of global position system (GPS) receiver, which is the main factor contributes to time to first fix (TTFF), can be shortened by estimating the Doppler frequency shift through external inertial navigation system (INS) information and almanac data and reducing the searching area. The traditional fast acquisition is analyzed, the fast acquisition of the GPS receiver aided is presented by INS information, and the signal is fine captured by spectrum zooming. Then the algorithm is simulated by sampled GPS intermediate frequency (IF) signal and the result verifies that this acquisition can dramatically improve the capability of GPS receiver and reduce its acquisition time.
引用
收藏
页码：300 / 305
页数：6
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