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Analog Mitigation of Frequency-Modulated Interference for Improved GNSS Reception



Otsikko2020 International Conference on Localization and GNSS, ICL-GNSS 2020 - Proceedings
ToimittajatJari Nurmi, Elena-Simona Lohan, Joaquin Torres-Sospedra, Heidi Kuusniemi, Aleksandr Ometov
ISBN (elektroninen)9781728164557
DOI - pysyväislinkit
TilaJulkaistu - kesäkuuta 2020
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaInternational Conference on Localization and GNSS -
Kesto: 2 kesäkuuta 20204 kesäkuuta 2020


Nimi2020 International Conference on Localization and GNSS, ICL-GNSS 2020 - Proceedings


ConferenceInternational Conference on Localization and GNSS


Powerful in-band interference can saturate a receiver's front-end and limit the usefulness of digital interference suppression methods that are bounded by the receiver's limited dynamic range. This is especially true for the self-interference (SI) encountered in full-duplex (FD) radios, but also in the case of strong interference between co-located radios. However, unlike in FD radios, receivers co-located with interference sources do not typically have direct access to the transmitted interference. This work analyzes the performance of a digitally-assisted analog interference mitigation method and its implementation for the suppression of frequency-modulated (FM) interference before quantization in global navigation satellite system (GNSS) receivers that are co-located with interference sources. Over-the-air measurement results are presented that illustrate the effects of interference mitigation on GPS L1 and Galileo E1 reception in a commercial off-the-shelf GNSS receiver and a software-defined GNSS receiver. The analysis covers the effects of the interference mitigation on the radio frequency (RF) front-end, acquisition, tracking, and positioning stages.