Design of a Multiband Global Navigation Satellite System Radio Frequency Interference Monitoring Front-End with
Aiden Morrison1, Nadezda Sokolova2, James Curran3
1SINTEF, 7034 Trondheim, Norway. Aiden.Morrison@sintef.no.
Sensors (Basel, Switzerland)
|August 12, 2018
Summary
Developing a low-cost, multi-frequency radio frequency interference (RFI) monitoring system is feasible. This system enables real-time RFI detection and logging, crucial for addressing increasing global navigation satellite system (GNSS) interference.
Area of Science:
- Electrical Engineering
- Signal Processing
- Navigation Systems
Background:
- Radio frequency interference (RFI) poses a significant threat to the reliability of Global Navigation Satellite System (GNSS) receivers.
- Existing RFI monitoring solutions are often costly and complex, hindering widespread deployment.
- There is a growing need for cost-effective and deployable systems for RFI characterization.
Purpose of the Study:
- To investigate the development of a multi-frequency RFI monitoring and characterization system optimized for low cost, ease of deployment, and operation.
- To design and develop a multiband GNSS front-end capable of synchronizing with non-RF sensors.
- To assess the system's effectiveness in determining the occurrence rates and intensities of GNSS interference events.
Main Methods:
- Designed and developed a compact, multi-channel RF front-end system named Four Independent Tuners with Data-packing (FITWD).
- Integrated capabilities for synchronizing side-channel information from non-RF sensors (e.g., inertial measurement units, power meters).
- Conducted a data collection campaign across European and Scandinavian countries to analyze L1/E1 and L5/E5a interference.
Main Results:
- Successfully developed a compact, low-cost, multi-channel RF front-end (FITWD) that supports external data source synchronization.
- Demonstrated the system's capability to simultaneously sample spectrum and log RFI events in real-time.
- Collected data on L1/E1 and L5/E5a interference events, proving FITWD as a viable alternative to expensive commercial solutions.
Conclusions:
- It is possible to create a compact, low-cost, multi-channel RF front-end with implicit external data source synchronization.
- The increasing occurrence of GNSS RFI events necessitates the future integration of such monitoring capabilities within receivers.
- The FITWD system offers a cost-effective solution for GNSS RFI monitoring and characterization.
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