Analytical Derivation of Maximum Tolerable In-Band Interference Levels for Aviation Applications of GNSS

Christopher J. Hegarty

Abstract:	This paper presents an analytic derivation of the maximum levels of radio frequency interference (RFI) that can be tolerated for aviation applications of GNSS. The derivation, which is included in RTCA Special Committee 159 Working Group 6’s document on RFl to GNSS, includes consideration of many factors not included comprehensively in previous analyses. Such factors include quantization loss, IF filtering losses, modulation imperfections in the navigation satellites (GPS, GLONASS, and WAAS), Doppler loop stress, processing gain losses due to realizable spreading codes, and oscillator phase noise. The goal of this paper is to demonstrate that the interference levels provided in RTCA’s Minimum Operational Performance Standards are indeed close to the maximum levels that can be tolerated for aviation applications by moderate-cost modern digital receiver designs.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	439 - 448
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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