Multi-Layer Defences for Robust GNSS Timing Retrieval

A multi-layered interference mitigation approach can significantly improve the performance of Global Navigation Satellite System (GNSS) receivers in the presence of jamming. In this work, three levels of defence are considered including: pre-correlation interference mitigation techniques, post-corre...

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Bibliographic Details
Published inSensors (Basel, Switzerland) Vol. 21; no. 23; p. 7787
Main Authors Gioia, Ciro, Borio, Daniele
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 23.11.2021
MDPI
Subjects
Defense
Fault detection
Fourier transforms
Global positioning systems
GPS
Infrastructure
interference defences
Jamming
Monitoring
Multilayers
Performance enhancement
Performance evaluation
Position measurement
Receivers
RIM
T-RAIM
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Summary:A multi-layered interference mitigation approach can significantly improve the performance of Global Navigation Satellite System (GNSS) receivers in the presence of jamming. In this work, three levels of defence are considered including: pre-correlation interference mitigation techniques, post-correlation measurement screening and FDE at the Position, Velocity, and Time (PVT) level. The performance and interaction of these receiver defences are analysed with specific focus on Robust Interference Mitigation (RIM), measurement screening through Lock Indicator (LIs) and Receiver Autonomous Integrity Monitoring (RAIM). The case of timing receivers with a known user position and using Galileo signals from different frequencies has been studied with Time-Receiver Autonomous Integrity Monitoring (T-RAIM) based on the Backward-Forward method. From the experimental analysis it emerges that RIM improves the quality of the measurements reducing the number of exclusions performed by T-RAIM. Effective measurements screening is also fundamental to obtain unbiased timing solutions: in this respect T-RAIM can provide the required level of reliability.
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These authors contributed equally to this work.
This paper is an extended version of our paper published in Gioia, C.; Borio, D. Interference Mitigation and T-RAIM for Robust GNSS Timing. In Proceedings of the 2021 IEEE 8th International Workshop on Metrology for AeroSpace (MetroAeroSpace), Virtual Conference, 23–25 June 2021.
ISSN:1424-8220
1424-8220
DOI:10.3390/s21237787