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Multi-Layer Defences for Robust GNSS Timing Retrieval.

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Summary
This summary is machine-generated.

A multi-layered Global Navigation Satellite System (GNSS) interference mitigation strategy enhances receiver performance. Robust Interference Mitigation (RIM) and measurement screening improve timing accuracy and reliability, even with jamming.

Keywords:
RIMT-RAIMinterference defencesjamming

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Area of Science:

  • Satellite Navigation Systems
  • Signal Processing
  • Interference Mitigation

Background:

  • Global Navigation Satellite System (GNSS) receivers face performance degradation due to jamming.
  • Multi-layered defence strategies are crucial for robust GNSS operation.
  • Existing methods require analysis of their synergistic effects.

Purpose of the Study:

  • To analyze a multi-layered interference mitigation approach for GNSS receivers.
  • To evaluate the performance and interaction of pre-correlation, post-correlation, and PVT-level defences.
  • To assess Robust Interference Mitigation (RIM), Lock Indicator (LI) screening, and Receiver Autonomous Integrity Monitoring (RAIM) for timing applications.

Main Methods:

  • Investigated three defence levels: pre-correlation mitigation, post-correlation measurement screening (LI), and Fault Detection and Exclusion (FDE) at the Position, Velocity, and Time (PVT) level.
  • Focused on Robust Interference Mitigation (RIM) and Receiver Autonomous Integrity Monitoring (RAIM).
  • Utilized Time-Receiver Autonomous Integrity Monitoring (T-RAIM) with the Backward-Forward method for Galileo signals on multiple frequencies with known user positions.

Main Results:

  • Robust Interference Mitigation (RIM) significantly improved measurement quality.
  • RIM reduced the number of exclusions required by T-RAIM.
  • Effective measurement screening is essential for unbiased timing solutions.
  • T-RAIM demonstrated its capability to provide reliable timing solutions.

Conclusions:

  • A multi-layered interference mitigation approach enhances GNSS receiver performance under jamming.
  • RIM and effective measurement screening are key components for reliable GNSS timing.
  • T-RAIM offers a reliable method for integrity monitoring in timing applications.