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Proceedings Paper

Frequency estimation algorithm for high dynamic GPS receivers based on UKF
Author(s): Yunlong Zhu; Zhongkan Liu; Qishan Zhang; Dongkai Yang
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Paper Abstract

Low estimation precision and high loss-of-lock threshold are the two important drawbacks of the EKF which is widely used for high dynamic GPS frequency estimate. To resolve the problems of the EKF, a novel algorithm based on unscented Kalman filter (UKF) is introduced to estimate frequency, and the UKF is simplified according to the linearity of the state equation, which is the feature of the frequency estimate. The simulations indicate that the loss-of-lock threshold of the novel algorithm is lower than that of the EKF, the estimation precision is improved compared with that of the EKF, and the novel algorithm has similar performance as the UKF, but the computational complexity of the novel algorithm is less than that of the UKF.

Paper Details

Date Published: 10 November 2007
PDF: 5 pages
Proc. SPIE 6795, Second International Conference on Space Information Technology, 67957S (10 November 2007); doi: 10.1117/12.775469
Show Author Affiliations
Yunlong Zhu, Beihang Univ. (China)
Zhongkan Liu, Beihang Univ. (China)
Qishan Zhang, Beihang Univ. (China)
Dongkai Yang, Beihang Univ. (China)


Published in SPIE Proceedings Vol. 6795:
Second International Conference on Space Information Technology

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