Last month, the European GNSS Agency (GSA) hosted a Workshop on RFI threats to GNSS in Aachen, Germany, gathering representatives from the National Frequency Agencies across Europe to get a first-hand look at the effects of radio interferences on GNSS receivers.

Through two half-day sessions, participants heard from experts on radio interferences detection and mitigation techniques, and saw field demonstrations on the effects of radio interferences on GNSS equipment (e.g. professional receivers and enabled phones).

On the first day of the workshop, European companies presented their work, covering such topics as the impact of threats to the GNSS receiver, hardware and software mitigation techniques, threat detection techniques, and test results. Several of the various effects of intentional and unintentional jamming has on the GNSS receiver were also demonstrated, including the impact on signal to noise ratio (SNR) and on timing and navigation data.

Possible implementation of active antennas, efficiency, limitations, and cost were also discussed, as well as algorithms for active antennas. Speakers presented real detections gathered during the last two years and showed off new state-of-the-art jammers and possible mitigation techniques.

Day two was all about live demonstrations of interferences to GNSS users. Spirent Technologies, Rheinish-Westfälische Technische Hochschule Aaachen, NSL, and Astri Polska all demonstrated signal processing techniques.

The workshop was organized with support from the Automotive and Rail Innovation Centre and FDC. Participants included 40 representatives from 16 EU governments, and 20 representatives from 13 EU industries. 

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