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TWSTFT 모뎀의 성능평가방안 및 성능분석

Study on a Method for Performance Evaluation and Analysis of TWSTFT Modems

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주제분류기타공학

초록

Time synchronization is crucial for ensuring the reliable operation of modern economic and social infrastructures. Techniques such as Global Navigation Satellite System (GNSS)-based methods and Two-Way Satellite Time and Frequency Transfer (TWSTFT) play key roles in precise time comparison and synchronization. TWSTFT, in particular, is recognized for its ability to achieve sub-nanosecond accuracy in time transfer, making it indispensable in fields such as satellite navigation. This paper proposes a comprehensive performance evaluation method for TWSTFT modems, emphasizing pre-validation in controlled environments to mitigate operational challenges. Using the proposed evaluation method, the study presents the standard deviation of RTT according to C/N0 and compares it with the datasheet of a commercial TWSTFT modem. Through this approach, the aim of this study is to enhance the reliability and accuracy of TWSTFT-based time synchronization across diverse applications.

Abstract

Time synchronization is crucial for ensuring the reliable operation of modern economic and social infrastructures. Techniques such as Global Navigation Satellite System (GNSS)-based methods and Two-Way Satellite Time and Frequency Transfer (TWSTFT) play key roles in precise time comparison and synchronization. TWSTFT, in particular, is recognized for its ability to achieve sub-nanosecond accuracy in time transfer, making it indispensable in fields such as satellite navigation. This paper proposes a comprehensive performance evaluation method for TWSTFT modems, emphasizing pre-validation in controlled environments to mitigate operational challenges. Using the proposed evaluation method, the study presents the standard deviation of RTT according to C/N0 and compares it with the datasheet of a commercial TWSTFT modem. Through this approach, the aim of this study is to enhance the reliability and accuracy of TWSTFT-based time synchronization across diverse applications.

참고문헌 (14)

  1. CCTF (Consultative Committee for Time and Frequency), "On Developing and Utilizing the Next-Generation Modems and Technologies for Two-Way Satellite Time and Frequency Transfer (TWSTFT) Used in UTC Generation", 22nd meeting of the CCTF (Session II - online) (2021)
  2. Cheng, P., "Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer", Remote Sensing, 14, pp.451~ (2022)[DOI]
  3. Fujieda, M., "A New TWSTFT Modem with Code and Carrier Phases", 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF, 2019, 1~2
  4. Fujieda, M., "Development of a new digital TWSTFT modem", International Journal of Electrical Engineering, 27, pp.141~145 (2020)[DOI]
  5. Hackman, C., "Commonclock two-way satellite time transfer experiments", Proceedings of the 1995 IEEE International Frequency Control Symposium (49th Annual Symposium), pp.275~272 (1995)
  6. Imae, M., "Two Way Satellite Time and Frequency Transfer", Journal of the National Institute of Information and Communications Technology, 50, pp.125~133 (2003)
  7. "ITU-R TF.1153, Technical document of ITU-R (The operational use of two-way satellite time and frequency transfer employing pseudorandom noise codes), ITU-R TF.1153-4" (2015)[URL]
  8. Jiang, Z., "A TWSTFT Calibration Guideline and the use of a GPS Calibrator for UTC TWSTFT link Calibrations", Proceedings of the 47th Annual Precise Time and Time Interval Systems and Applications Meeting (ION PTTI), pp.231~242 (2016)
  9. Lee, J., "Truncated M-sequence and BOC Modulation based Ranging Signal Design for TWSTFT", Proceedings of the 2024 NSCL International & CPEM Conference (2024)
  10. Lee, J., "Improved Method and Message Structure Design for TWSTFT without Extra Network", Journal of Positioning, Navigation, and Timing, 12, pp.201~209 (2023)[DOI]
  11. Lee, J., "Phase Jitter Analysis of Overlapped Signals for All-to-All TWSTFT Operation", Journal of Positioning, Navigation, and Timing, 12, pp.245~255 (2023)[DOI]
  12. "Satellite Time Transfer and Ranging Equipment (SATRE) Datasheet" (2012)[URL]
  13. Yang, S. -h., "Multi-channel Two-Way Time Transfer Using a Communication Satellite, Journal of Institute of Control", Robotics and Systems, 15, pp.346~352 (2009)[DOI]
  14. Zhang, V., "Two-Way Satellite Time and Frequency Transfer Using 1 MChip", S Codes, 2009, 371~382

관련 논문AI추천

Improved Method and Message Structure Design for TWSTFT without Extra NetworkJong Koo Lee, Joon Hyo Rhee, Juhyun Lee, Ju-Ik Oh, Sung-hoon Yang, Young Kyu Lee사단법인 항법시스템학회 · Journal of Positioning, Navigation, and Timing2023 · 제12권 제2호이중 차분 TCH 기반 TWSTFT 및 GPS 시각비교 성능분석양성훈, 오주익, 유대혁, 이영규, 이종구, 이주현, 이준효, 최경원, 허명선, 허윤정사단법인 항법시스템학회 · Journal of Positioning, Navigation, and Timing2025 · 제14권 제3호Phase Jitter Analysis of Overlapped Signals for All-to-All TWSTFT OperationGyeong Won Choi, Jong Koo Lee, Joon Hyo Rhee, Juhyun Lee, Ju-Ik Oh, Sung-hoon Yang, Young Kyu Lee사단법인 항법시스템학회 · Journal of Positioning, Navigation, and Timing2023 · 제12권 제3호International Time Comparison by TWSTFT and GPS at KRISS양성훈, 이상정, 이용규, 이종구, 이창복, 황상욱사단법인 항법시스템학회 · Journal of Positioning, Navigation, and Timing2016 · 제5권 제2호GNSS 수신기 간 시각 동기 유지를 위한 시계 오차 모델링 기법 비교김경민, 박승현, 서지원, 이준효, 이철수, 이하림사단법인 항법시스템학회 · Journal of Positioning, Navigation, and Timing2025 · 제14권 제3호Performance Estimation of KPST to GPS Time Offset for GNSS Interoperability to Increase Navigational PerformanceHo Seong Lee, Jong Koo Lee, Joon Hyo Rhee, Ju Hyun Lee, Sang-wook Hwang, Sung-hoon Yang, Young Kyu Lee사단법인 항법시스템학회 · Journal of Positioning, Navigation, and Timing2022 · 제11권 제3호

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