Exotic FMCW Waveform Mitigation with an Advanced Multi-Parameter Adaptive Notch Filter (MPANF)

J. Rossouw van der Merwe, Iñigo Cortés, Fabio Garzia, Alexander Rügamer, and Wolfgang Felber

Abstract:	Adaptive notch filters (ANFs) can efficiently mitigate linear chirp signals. However, they are only a subclass of frequency-modulated continuous-wave (FMCW) waveforms. Many other FMCW signals could pose potential threats in the future. This paper evaluates several exotic FMCW waveforms and how mitigateable they are with ANFs. Furthermore, the advanced multi-parameter adaptive notch filter (MPANF) is demonstrated. In most cases, the MPANF is superior to traditional static ANFs. Several FMCW waveforms are challenging to mitigate, but most approaches indicate adequate performance. This paper demonstrates shortcomings in current mitigation techniques and provides a baseline for future-proofing global navigation satellite system (GNSS) resiliency.
Published in:	Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022) September 19 - 23, 2022 Hyatt Regency Denver Denver, Colorado
Pages:	3783 - 3819
Cite this article:	Merwe, J. Rossouw van der, Cortés, Iñigo, Garzia, Fabio, Rügamer, Alexander, Felber, Wolfgang, "Exotic FMCW Waveform Mitigation with an Advanced Multi-Parameter Adaptive Notch Filter (MPANF)," Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, Colorado, September 2022, pp. 3783-3819. https://doi.org/10.33012/2022.18566
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