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Impact Evaluation of DME Beacons on BeiDou B2a Signal Reception Performance
Yicheng Li1, Jinli Cui2, Zhenyang Ma1,3
1Key Laboratory of Civil Aviation Aircraft Airworthiness Certification Technology, Civil Aviation University of China, Tianjin 300300, China.
Sensors (Basel, Switzerland)
|June 27, 2025
Summary
Electromagnetic interference from Distance Measuring Equipment (DME) beacons impacts the BeiDou-3 Navigation Satellite System (BDS-3) B2a signal. This interference degrades navigation accuracy and flight safety, necessitating optimized beacon deployment.
Area of Science:
- Satellite Navigation Systems
- Electromagnetic Interference
- Aviation Safety
Background:
- The BeiDou-3 Navigation Satellite System (BDS-3) faces operational challenges due to electromagnetic interference.
- Distance Measuring Equipment (DME) ground beacons interfere with the newly implemented B2a signal.
Purpose of the Study:
- To develop a model for evaluating DME interference effects on BDS-3 B2a signal reception.
- To quantify the degradation of B2a signal performance under DME interference.
Main Methods:
- Developed a receiver signal processing-based interference evaluation model.
- Analyzed empirical data from DME beacons in the Chinese mainland.
- Assessed impacts on carrier-to-noise ratio (C/N0), detection probability, tracking accuracy, and bit error rate (BER).
Main Results:
- Effective C/N0 degraded by up to 3.25 dB.
- Detection probability decreased by 33%.
- Carrier tracking errors and BER increased by 2.57° and 5.1% respectively in worst-case scenarios.
- Spatial correlation observed between interference hotspots and high aircraft density areas.
Conclusions:
- DME interference adversely affects the accuracy, availability, continuity, and integrity of airborne BDS navigation.
- Findings support developing Minimum Operational Performance Standards for B2a receivers.
- Recommendations for optimizing DME beacon deployment to enhance civil aviation flight safety.
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