Performance Comparison of FLL Adaptive Notch Filters to Counter GNSS Jamming

Adaptive notch filters in general, and frequency lock loop-equivalent adaptive notch filters in particular, have been shown to be an effective solution to counteract jamming signals. Much effort has been spent at analyzing their adaptive capability, while detection approaches in charge of activating...

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Bibliographic Details
Main Authors: Gamba, Micaela Troglia, Falletti, Emanuela
Format: Conference Proceeding
Language:English
Subjects:
Adaptive Notch Filter (ANF)
Frequency Lock Loop (FLL)
Frequency locked loops
Global navigation satellite system
Global Navigation Satellite System (GNSS)
Interference
Jamming
Noise measurement
Time-frequency analysis
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Summary:Adaptive notch filters in general, and frequency lock loop-equivalent adaptive notch filters in particular, have been shown to be an effective solution to counteract jamming signals. Much effort has been spent at analyzing their adaptive capability, while detection approaches in charge of activating/deactivating the filter have not been properly addressed. This paper presents two new detection strategies, namely discriminator-based and output-input power ratio-based, suitable to be applied to FLL-equivalent ANFs. The performance evaluation for several interference-to-noise ratio conditions demostrates their suitability to be combined with such kind of filters and their effectiveness in mitigating jamming signals.
ISSN:2325-0771
DOI:10.1109/ICL-GNSS.2019.8752751