Frequency estimation algorithm for high dynamic GPS receivers based on UKF

Yunlong Zhu; Zhongkan Liu; Qishan Zhang; Dongkai Yang

doi:10.1117/12.775469

10 November 2007 Frequency estimation algorithm for high dynamic GPS receivers based on UKF

Yunlong Zhu, Zhongkan Liu, Qishan Zhang, Dongkai Yang

Proceedings Volume 6795, Second International Conference on Space Information Technology; 67957S (2007) https://doi.org/10.1117/12.775469
Event: Second International Conference on Spatial Information Technology, 2007, Wuhan, China

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.

Citation Download Citation

Yunlong Zhu, Zhongkan Liu, Qishan Zhang, and Dongkai Yang "Frequency estimation algorithm for high dynamic GPS receivers based on UKF", Proc. SPIE 6795, Second International Conference on Space Information Technology, 67957S (10 November 2007); https://doi.org/10.1117/12.775469

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