Modeling method for oscillator flicker noise in Kalman-based GPS tracking loop

被引：0
|
作者：
Jin, Tian [1 ]
Wang, Lihua [1 ]
Huang, Bingsheng [1 ]
机构：
[1] School of Electronic Information and Engineering, Beihang University
来源：
Zhongguo Kongjian Kexue Jishu/Chinese Space Science and Technology | 2012年 / 32卷 / 05期
关键词：
Crystal oscillator noise; Error modeling; Global positioning system; Kalman filtering; Tracking loop;
D O I：
10.3780/j.issn.1000-758X.2012.05.006
中图分类号：
学科分类号：
摘要：
Frequency drift caused by oscillator will pollute carrier phase and Doppler frequency in GPS receiver. Therefore, it is necessary to model the oscillator error in the tracking system. The flicker noise error of oscillator can not be exactly modeled in Kalman system, which causes errors in the model of traditional Kalman-based tracking loop. To solve these problems, the frequency domain model and noise covariance of oscillator were analyzed, and a method of exactly modelling the flicker noise in the Kalman-based tracking loop was proposed. Real GPS satellite data was processed by using the new oscillator model to verify the validity.
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收藏
页码：34 / 39
页数：5
相关论文
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