Ultra-tight GPS/INS Receiver Performance in the Presence of Jamming Signals

Sergey Krasovski, Mark Petovello and Gérard Lachapelle

Abstract:	his paper investigates the ability of an ultra-tight receiver with an inertial navigation system (INS) to detect Continuous Wave (CW) Radio-Frequency Interference (RFI) signals at the tracking and navigation solution stage. An Interference Detector (ID) module is incorporated into the tracking stage of a GPS software receiver, and it performs the RFI identification in every individual channel. Subsequently, a new observation weighting (OW) algorithm is developed to help classify the raw measurements when RFI signal is present. Specifically, OW takes into account information from both the ID and additional signal quality parameters to determine how much each particular observation is affected by the jamming signal, if the latter is present. Performance of the ID and the ultra-tight receiver, aided by the RFI detector, are assessed using simulated data. Moreover, the vector-based receiver with incorporated ID module is tested on real data, which were corrupted by strong RFI signals. Results of the ID performance are presented in this paper. Additionally, analysis of tracking and navigation domain results is presented to illustrate the improvements obtained by aiding the ultra-tight receiver with the ID.
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:	2220 - 2232
Cite this article:	Krasovski, Sergey, Petovello, Mark, Lachapelle, Gérard, "Ultra-tight GPS/INS Receiver Performance in the Presence of Jamming 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. 2220-2232.
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