Multi-layered Multi-Constellation Global Navigation Satellite System Interference Mitigation

Several layers of defense can be implemented in a GNSS receiver to improve its performance in the presence of interference. These layers include the use of pre-correlation mitigation techniques, post-correlation quality indicators to screen measurements and FDE at the position solution level. This paper provides a characterization of the interaction between these layers of interference mitigation and measurement quality check. Data collected in the presence of increasing jamming power levels have been processed using different interference mitigation techniques, including RIM and the ANF. A SDR approach has been adopted and measurements were generated considering five interference mitigation techniques. Position solutions were then computed using the forward-backward approach for RAIM. Signals from GPS, Galileo and Beidou were processed and both single and dual-constellation solutions were analysed. The analysis shows that interference mitigation allows the receiver to track a higher number of signals, even in the presence of high jamming power levels. This increased measurement availability is then effectively exploited by RAIM techniques that provide more reliable solutions. Measurements from several constellations further improve the reliable availability of the position solutions.

GIOIA Ciro;  BORIO Daniele; 

2023-10-24

INST NAVIGATION - ION

JRC130953

0028-1522 (online),   

https://navi.ion.org/content/70/4/navi.596,    https://publications.jrc.ec.europa.eu/repository/handle/JRC130953,   

10.33012/navi.596 (online),