GNSS Interference Monitoring via Maneuver-Based Detection Suspension
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Solution Overview
Problem
Existing GNSS receivers are susceptible to jamming, which can lead to false detections of interference due to vehicle maneuvers, resulting in inaccurate navigation solutions.
Innovation Solution
A system and method for GNSS interference monitoring that includes a processor configured to calculate detection parameters based on carrier-to-noise measurements and determine the state of signals, while suspending interference detection during vehicle maneuvers to avoid false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference detection is continuously performed, then detection capability is maintained, but false detections increase during vehicle maneuvers
Solution Approach 1:
The system dynamically adjusts its detection behavior based on vehicle motion state. During maneuvers, the interference detection function is temporarily suspended or reduced, while maintaining normal operation during steady-state conditions. This dynamic adaptation resolves the contradiction by preventing false detections during maneuvers while preserving detection capability when needed.
Solution Approach 2:
The system changes the detection parameter threshold or detection enabled/disabled state based on vehicle maneuver detection. When maneuver conditions are detected, the system modifies the interference detection parameters (either suspending detection or adjusting thresholds) to avoid false alarms, thereby resolving the contradiction between continuous detection and false detection prevention.
2Measurement precision
If detection parameters are highly sensitive, then interference detection capability improves, but false alarms during maneuvers increase
Solution Approach 1:
The system employs dynamic threshold adjustment where detection sensitivity is high during steady-state conditions but reduced or suspended during vehicle maneuvers. This allows the system to maintain measurement precision for genuine interference detection while preventing false alarms during dynamic vehicle operations.
Solution Approach 2:
The system performs preliminary detection of vehicle maneuver conditions before finalizing interference detection decisions. By anticipating and identifying maneuver states in advance, the system can preemptively adjust detection sensitivity or suspend detection, preventing false alarms while maintaining high sensitivity for actual interference.
Data Source
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AI summary
Systems and methods for GNSS interference monitoring are provided. In certain embodiments, a system includes at least one GNSS receiver configured to receive a plurality of signals from a plurality of satellites and provide measurements from the plurality of satellites; and a processor coupled to the at least one GNSS receiver. Further, the processor is configured to calculate a detection parameter that comprises at least one of a composite detection parameter based on a short-term average and a long-term average of carrier-to-noise measurements for the plurality of signals; and a transient detection parameter based on an average difference for the plurality of satellites between the short-term average and long-term average of the carrier-to-noise measurements for each satellite in the plurality of satellites. The processor is also configured to determine a state of the plurality of signals based on a comparison of the composite detection parameter against a comparison threshold.