Characterization of Nominal Signal Distortions and Impact on Receiver Performance for GPS (IIF) L1/L5 and Galileo (IOV) E1 /E5a Signals

S. Thoelert, M. Vergara, M. Sgammini, C. Enneking, F. Antreich, M. Meurer, D. Brocard, C. Rodriguez

Abstract:	Modeling both nominal distortions and signal anomalies (i.e. Evil waveforms, International Civil Aviation Organization (ICAO) threat models) is crucial for an accurate user error budget for Space-based Augmentation Systems (SBAS) and Ground-based Augmentation systems (GBAS) (multi-frequency, multi-constellation). Such analysis is of particular interest for the ongoing standardization work of L1-L5 SBAS services. In this paper we propose a method to jointly estimate the analog and the digital distortions. This comes very useful in those cases in which the estimates of the two satellite imperfections are interdependent, e.g. when the time-bandwidth product is small. The impact of both satellite imperfections on the ranging performance of a Global Navigation Satellite Systems (GNSS) receiver is assessed by means of analytical formulas which make use of the cross-power spectral density (CPS) between the distorted and the ideal signal, and of the power spectral density (PSD) of the nominal (ideal) signal.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	3113 - 3128
Cite this article:	Thoelert, S., Vergara, M., Sgammini, M., Enneking, C., Antreich, F., Meurer, M., Brocard, D., Rodriguez, C., "Characterization of Nominal Signal Distortions and Impact on Receiver Performance for GPS (IIF) L1/L5 and Galileo (IOV) E1 /E5a Signals," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 3113-3128.
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