Effect of Signal Quantization on Robust Anti-jamming in Snapshot Receivers

Helena Calatrava, Adrià Gusi-Amigó, Floor Melman, Pau Closas

Peer Reviewed

Abstract: GNSS jamming signals are L-band spectrum interferences that can jeopardize the operation of GNSS-based services. Consequently, jamming cancellation and mitigation techniques have received substantial interest in the field of GNSS positioning in the last few years. An advantageous approach to performing jamming mitigation relies on the use of robust statistics, with a framework known as Robust Interference Migration (RIM). In this paper, the RIM methodology is assessed in the context of a GNSS software snapshot receiver architecture under the presence of three jamming interferences simulated as representative cases of common mass-market jammers. A study on the effect of signal quantization in GNSS snapshot receivers is provided with a focus on interference mitigation. Results suggest that the clipping effect originated by the finite quantization dynamic range causes signal distortion, which leads to undesirable receiver performance for a low number of quantization bits. However, when applying RIM, a gain proportional to the number of quantization bits is observed in terms of the number of visible satellite vehicles, availability of the position, velocity and time (PVT) solution, and observed carrier-to-noise density ratio.
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: 2935 - 2948
Cite this article: Calatrava, Helena, Gusi-Amigó, Adrià, Melman, Floor, Closas, Pau, "Effect of Signal Quantization on Robust Anti-jamming in Snapshot Receivers," Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, Colorado, September 2023, pp. 2935-2948. https://doi.org/10.33012/2023.19351
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