Analyzing Direction of Arrival Dynamics in GNSS Controlled-Reception Pattern Antennas Under Real Jamming Scenarios

Aisha Elsayem, Mohamed Tamazin, Haidy Elghamrawy, Aboelmagd Noureldin, and Pierre-Marie Le Veel

Abstract: This paper investigates the effects of jamming signal Direction of Arrival (DOA) variations on the performance of two Controlled Reception Pattern Antennas (CRPAs): the NovAtel 7-element GAJT and the 4-element CRPA. By leveraging the Safran GSG-8 GNSS Signal Simulator and the Skydel software, experiments were conducted in an anechoic chamber at the Royal Military College of Canada, where GNSS signals were broadcast alongside real jamming signals. Two types of high-power jamming signals, Continuous Wave (CW) and Narrowband (NB) were used to assess the antennas' ability to mitigate interference under changing DOA conditions. Metrics such as Carrier-to-Noise ratio (C/N?), Position Dilution of Precision (PDOP), and position accuracy were analyzed to evaluate each antenna's performance. Results demonstrate that while both antennas are vulnerable to CW jamming, the 7-element GAJT antenna exhibited better resilience against NB jamming, maintaining higher positional accuracy and signal integrity. The findings provide valuable insights into the performance of CRPAs in dynamic interference scenarios, highlighting the importance of DOA variations in assessing anti-jamming capabilities.
Published in: Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2024)
September 16 - 20, 2024
Hilton Baltimore Inner Harbor
Baltimore, Maryland
Pages: 3769 - 3778
Cite this article: Elsayem, Aisha, Tamazin, Mohamed, Elghamrawy, Haidy, Noureldin, Aboelmagd, Le Veel, Pierre-Marie, "Analyzing Direction of Arrival Dynamics in GNSS Controlled-Reception Pattern Antennas Under Real Jamming Scenarios," Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2024), Baltimore, Maryland, September 2024, pp. 3769-3778. https://doi.org/10.33012/2024.19701
Full Paper: ION Members/Non-Members: 1 Download Credit
Sign In