Multi-Circular Ring CRPA with Robust GNSS Performance for Civil Applications

Chris Bartone, Bradford W. Parkinson, Tom Stansell

Abstract:	This paper investigates various GNSS Controlled Reception Pattern Antenna (CRPA) configurations to provide interference/jamming mitigation in a robust fashion for civil aviation applications. Various CRPA configurations are investigated that utilize a digital beam forming within a digital software receiver architecture for high performance civil applications. A GPS31 Constellation was simulated where 12 GPS satellites were selected individually as desired signals and 6 Jammer signals, 100 Watts each, were placed in the same general area. Both 3D and 2D radiation characteristics were produced and analyzed, as well as, signal-to-interference-to-noise ratios, Jammer-to-Signal ratios, and the number of satellites available for State 5 C/A and L5 code data decode were investigated for various cases. These simulation results indicate that over a 94% reduction in jamming effectiveness can be achieved with various CRPA configurations. Utilization of CRPA antennas, even ones with moderate size and complexity (e.g., CRPA7, CRPA19) provide significant reduction in jamming efficiency at the RF level to then enable other types of interference mitigation techniques, such as STAP, SFAF, integration with inertial sensors, and so on. One inhibiting factor to achieve these benefits for civil aviation are the Unites States EAR/ITAR restrictions.
Published in:	Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023) September 11 - 15, 2023 Hyatt Regency Denver Denver, Colorado
Pages:	3709 - 3730
Cite this article:	Bartone, Chris, Parkinson, Bradford W., Stansell, Tom, "Multi-Circular Ring CRPA with Robust GNSS Performance for Civil Applications," Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, Colorado, September 2023, pp. 3709-3730. https://doi.org/10.33012/2023.19367
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