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A novel demodulation algorithm for VHF Data Broadcast signals in multi-sources augmentation navigation system

Author

Listed:
  • Hongwei Zhao
  • Zichun Zhang
  • Xiaozhu Shi
  • Yihui Yin

Abstract

The augmentation navigation system based on multi-source information fusion can significantly improve position accuracy, and the multi-source information is usually transmitted through VHF Data Broadcast . Aiming at the burst characteristics of VHF Data Broadcast, this article proposed a novel demodulation algorithm based on open-loop structure. When a VHF Data Broadcast burst is detected, the timing recovery should be finished first, and the value of cross-correlation between the timing-recovered signal and the local training symbol is calculated to complete the frame synchronization. Then, the data-aided and non-data-aided algorithms are used to estimate the frequency offset. Finally, the phase offset is estimated and the carrier synchronization is accomplished. The simulation results demonstrate that the proposed algorithm can quickly accomplished carrier synchronization without using feedback-loop structure, and the bit error rate is less than 10 −4 when the signal-to-noise ratio is greater than 17 dB, which satisfy the requirement of receiving VHF Data Broadcast signals in augmentation navigation system. Therefore, the proposed algorithm can be used for receiving VHF Data Broadcast signals.

Suggested Citation

  • Hongwei Zhao & Zichun Zhang & Xiaozhu Shi & Yihui Yin, 2020. "A novel demodulation algorithm for VHF Data Broadcast signals in multi-sources augmentation navigation system," International Journal of Distributed Sensor Networks, , vol. 16(3), pages 15501477209, March.
    • Handle: RePEc:sae:intdis:v:16:y:2020:i:3:p:1550147720914770
    DOI: 10.1177/1550147720914770
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