A Cascade Tracking Loop for Weak GPS Signals

Ming Xing Shi; Bi Yu Tang; Ao Peng

doi:10.4028/www.scientific.net/AMM.719-720.1116

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 719-720A Cascade Tracking Loop for Weak GPS Signals

A Cascade Tracking Loop for Weak GPS Signals

Abstract:

It’s important to get accurate carrier phase and frequency information when using a standalone GPS receiver. In weak signal applications, to keep a stable tracking is hard to achieve because measuring error will be huge when the SNR is low. Different methods are used to improve the SNR before the detector in a tracking process, such as coherence integration. And this paper keeps eyes on a different viewpoint, on how to refine estimation results. A cascade structure is introduced for weak signal tracking. This structure is divided into two levels. In the first level, raw phase estimation and accurate frequency estimation is provided to achieve stable work in low CNR environment. In the second level, the raw phase estimation is refined to achieve accurate tracking requirement. This cascade structure can also work jointly with any other SNR-improving technology to get a better performance.

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Periodical:

Applied Mechanics and Materials (Volumes 719-720)

Pages:

1116-1123

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.719-720.1116

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Cite this paper

Online since:

January 2015

Authors:

Ming Xing Shi, Bi Yu Tang*, Ao Peng

Keywords:

Carrier Phase, EKF, FD, Pd, Tracking Loop, Weak GPS Signals

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* - Corresponding Author

References

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