Cyclostationary Analysis of SVN-49 Signal Distortion

A.C. Utter, C.E. Edgar, T.D. Powell, P.A. Dafesh

Abstract:	The GPS satellite Space Vehicle Number 49 (SVN-49), launched in March 2009, contains a fault that results in a multipath-like anomaly in its navigation signal. A detailed characterization of the anomaly, which changes with elevation angle, would facilitate improved mitigation techniques. To this end, a cyclostationary chip-shape analysis was applied to data recorded from the German Aerospace Center (DLR) 30-meter dish antenna at Weilheim, Germany, as SVN-49 passed directly overhead during April 2010. Comparison against the baseline chip shape allowed the measurement of the delay, phase, and amplitude of each multipath component as a function of elevation angle and the construction of high-fidelity models for each. This paper describes the details of the analysis method, its limitations, and its applicability to SVN-49 and future signal distortion analysis.
Published in:	Proceedings of the 2011 International Technical Meeting of The Institute of Navigation January 24 - 26, 2011 Catamaran Resort Hotel San Diego, CA
Pages:	746 - 758
Cite this article:	Utter, A.C., Edgar, C.E., Powell, T.D., Dafesh, P.A., "Cyclostationary Analysis of SVN-49 Signal Distortion," Proceedings of the 2011 International Technical Meeting of The Institute of Navigation, San Diego, CA, January 2011, pp. 746-758.
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