Dual-Domain Robust GNSS Interference Mitigation

Haoqing Li, Daniele Borio, Pau Closas

Abstract: Due to its high accuracy and Earth coverage, Global Navigation Satellite System (GNSS) has been achieving an ever increasing penetration in our daily life. However, GNSS performance can be easily degraded by Radio Frequency (RF) interference, which can be easily encountered in real world situations. Therefore, it is necessary to adopt mitigation strategies able to reduce the impact of interference. Several interference mitigation strategies are based on the Interference Cancellation (IC) principle, which requires the detection and estimation of the interference waveform. The Robust Interference Mitigation (RIM) framework is an alternative to this type of approaches and mitigates interference using robust statistics principles treating interference as outliers. Most interference signals can be represented as outliers in certain domain and robust methods are typically efficient ways to remove them. For instance, Huber’s non-linearity, which is a typical robust approach, has been studied for its application in either time or transformed (e.g., frequency) domains with promising results. In real world applications, it is however difficult to know a priori whether the interference can be treated as an outlier in the time or transformed domains. Therefore, this work investigates the application of Huber’s non-linearity in both domains. This approach is termed as Dual-Domain RIM (DD-RIM) and provides enhanced performance compared to single domain approaches.
Published in: Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019)
September 16 - 20, 2019
Hyatt Regency Miami
Miami, Florida
Pages: 991 - 1002
Cite this article: Li, Haoqing, Borio, Daniele, Closas, Pau, "Dual-Domain Robust GNSS Interference Mitigation," Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Miami, Florida, September 2019, pp. 991-1002. https://doi.org/10.33012/2019.16991
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