Sign in Subscribe
Sensors

Impact Evaluation of DME Beacons on BeiDou B2a Signal Reception Performance

Strategic Insights

— 1 min read

Research has revealed that the BeiDou-3 Navigation Satellite System (BDS-3) has been significantly challenged by electromagnetic interference from Distance Measuring Equipment (DME) ground beacons to the newly implemented B2a signal, since its full operational deployment in 2020. The study, conducted by researchers from the Civil Aviation University of China, developed a comprehensive interference evaluation model to quantify the degradation of B2a signal reception performance under DME interference scenarios. The results demonstrated that DME interference adversely affected the accuracy, availability, continuity, and integrity of the airborne BeiDou navigation system, thereby compromising civil aviation flight safety.

Key Takeaways:

  • The BeiDou-3 Navigation Satellite System (BDS-3) has been significantly challenged by electromagnetic interference from Distance Measuring Equipment (DME) ground beacons to the newly implemented B2a signal.
  • The interference evaluation model developed by researchers from the Civil Aviation University of China quantified the degradation of B2a signal reception performance under DME interference scenarios, demonstrating a significant impact on civil aviation flight safety.
  • The results showed that DME interference led to a 3.25 dB degradation of the effective carrier-to-noise ratio (C/N0), a 33% decrease in signal detection probability, and a 2.57° increase in carrier tracking errors, as well as a 5.1% increase in demodulation bit error rate (BER).
  • Significant spatial correlation was observed between the interference hotspots and regions of high aircraft density, indicating a substantial impact on air traffic control and navigation systems.
  • The study concluded that developing Minimum Operational Performance Standards for B2a signal receivers and strategically optimizing DME beacon deployment throughout the Chinese mainland is crucial to ensuring the accuracy, availability, continuity, and integrity of the airborne BeiDou navigation system.

Statistics:

  • The effective C/N0 of the B2a signal degraded by up to 3.25 dB in worst-case interference scenarios.
  • The signal detection probability decreased by 33% due to DME interference.
  • Carrier tracking errors increased by 2.57° in the presence of DME interference.
  • Demodulation bit error rate (BER) increased by 5.1% in worst-case scenarios.
  • Significant spatial correlation was observed between interference hotspots and regions of high aircraft density.

Sources:

  • Impact Evaluation of DME Beacons on BeiDou B2a Signal Reception Performance. Sensors, 2025, 25(12): 3763. (Sensors - http://www.mdpi.com/journal/sensors)
  • Civil Aviation University of China. Yicheng Li, Jinli Cui, Zhenyang Ma, Zhaobin Duan. Key Laboratory of Civil Aviation Aircraft Airworthiness Certification Technology, Civil Aviation University of China, Tianjin 300300, People's Republic of China.

Read more