L5-Direct™ Outperforms Consumer and IoT L1+L5 Dual-Band GNSS Receivers Under Radio Frequency Interference (RFI)

Kamil Grajski, Paul McBurney, Nagaraj Shivaramaiah, Michal Misiaszek, Florean Curticapean, Drew Compston, R. Nalluri, and Sunil Patel

Abstract: The detection, classification, and mitigation of RFI in GNSS is driving innovation within and beyond GNSS (Humphreys, (2021); Parkinson, (2022)). This study presents two empirical lab-based analyses of the response to RFI of commercial off-the-shelf consumer and IoT L1+L5 dual-band GNSS receivers and the oneNav L5-Direct GNSS receiver. We demonstrate the vulnerability of commercial off-the-shelf L1+L5 dual-band GNSS receivers to even modest L1 band RFI. The consequence of this vulnerability is that typical consumer and IoT L1+L5 dual-band GNSS receiver designs deny end users the benefits of L5 signals - where and when they are needed most. Towards delivering the benefits of L5 band signals, we demonstrate that the oneNav L5-Direct dual side band architecture not only provides complete immunity to L1 RFI but is robust with respect to narrowband RFI occurring in either E5a or E5b.
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: 1165 - 1175
Cite this article: Grajski, Kamil, McBurney, Paul, Shivaramaiah, Nagaraj, Misiaszek, Michal, Curticapean, Florean, Compston, Drew, Nalluri, R., Patel, Sunil, "L5-Direct™ Outperforms Consumer and IoT L1+L5 Dual-Band GNSS Receivers Under Radio Frequency Interference (RFI)," Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2024), Baltimore, Maryland, September 2024, pp. 1165-1175. https://doi.org/10.33012/2024.19723
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