Journal of Positioning, Navigation, and Timing (J Position Navig Timing; JPNT)
Citation: Lee, J., Oh, J.-I., Rhee, J. H., Choi, G. W., Lee, Y. K., Lee, J. K., & Yang, S.-H., 2023, Phase Jitter Analysis of Overlapped Signals for All-to-All TWSTFT Operation, Journal of Positioning, Navigation, and Timing, 12, 245-255.
Journal of Positioning, Navigation, and Timing (J Position Navig Timing) 2023 September, Volume 12, Issue 3, pages 245-255. https://doi.org/10.11003/JPNT.2023.12.3.245
Received on 15 August 2023, Revised on 25 August 2023, Accepted on 30 August 2023, Published on 30 September 2023.
License: Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/bync/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Juhyun Lee, Ju-Ik Oh, Joon Hyo Rhee, Gyeong Won Choi, Young Kyu Lee, Jong Koo Lee, Sung-hoon Yang†
Time and Frequency Group, Division of Physical Metrology, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Korea
†Corresponding Author: E-mail, shyang@kriss.re.kr; Tel: +82-42-868-5147 Fax: +82-504-407-5500
Time comparison techniques are necessary for generating and keeping Coordinated Universal Time (UTC) and distributing standard time clocks. Global Navigation Satellite System (GNSS) Common View, GNSS All-in-View, Two-Way Satellite Time and Frequency Transfer (TWSTFT), Very Long Baseline Interferometry (VLBI), optical fiber, and Network Time Protocol (NTP) based methods have been used for time comparison. In these methods, GNSS based time comparison techniques are widely used for time synchronization in critical national infrastructures and in common areas of application such as finance, military, and wireless communication. However, GNSS-based time comparison techniques are vulnerable to jamming or interference environments and it is difficult to respond to GNSS signal disconnection according to the international situation. In response, in this paper, Code-Division Multiple Access (CDMA) based All-to-All TWSTFT operation method is proposed. A softwarebased simulation platform also was designed for performance analysis in multi-TWSTFT signal environments. Furthermore, code and carrier measurement jitters were calculated in multi-signal environments using the designed simulation platform. By using the technique proposed in this paper, it is anticipated that the TWSTFT-based time comparison method will be used in various fields and satisfy high-performance requirements such as those of a GNSS master station and power plant network reference station.
TWSTFT, CDMA, overlapped signals, DLL phase jitter, PLL phase jitter
Cheng, P., Shen, W., Sun, X., Cai, C., Wu, K., et al. 2022, Measuring Height Difference Using Two-Way Satellite Time and Frequency Transfer, Remote Sensing, 14, 451. https://doi.org/10.3390/rs14030451
Fujieda, M., Tabuchi, R., & Gotoh, T. 2019, A New TWSTFT Modem with Code and Carrier Phases, In 2019 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum (EFTF/IFC), Orlando, FL, USA, 14-18 April 2019, pp.1-2. https://doi.org/10.1109/fcs.2019.8856010
Fujieda, M., Tabuchi, R., & Gotoh, T. 2020, Development of a new digital TWSTFT modem, International Journal of Electrical Engineering, 27, 141-145. https://doi.org/10.6329/CIEE.202008_27(4).0004
Hanson, D. W. 1989, Fundamentals of two-way time transfers by satellite, In Proceedings of the 43rd Annual Symposium on Frequency Control, Denver, CO, USA, 31 May – 02 June 1989, pp.174-178. https://doi.org/10.1109/ freq.1989.68861
Hartl, P., Veenstra, L., Gieschen, N., Mussencr, K. M., Schafer, W., et al. 1983, Spread spectrum time transfer experiment via INTELSAT, In Proceedings of the 15th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, 6-8 Dec 1983, pp.331-356. https://www.ion.org/publications/ abstract.cfm?articleID=16199
Imae, M., Suzuyama, T., Gotoh, T., Shibuya, Y., Nakagawa, F., et al. 2003, Two Way Satellite Time and Frequency Transfer, Journal of the National Institute of Information and Communications Technology, 50, 125-133. https:// www.nict.go.jp/publication/shuppan/kihou-journal/ journal-vol50no1.2/0403.pdf
ITU-R TF.1153 2015, 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. https://www.itu.int/dms_pubrec/itu-r/rec/ tf/R-REC-TF.1153-4-201508-I!!PDF-A.pdf
Kirchner, D. 1991, Two-way time transfer via communication satellites, Proceedings of the IEEE, 79, 983-990. https:// doi.org/10.1109/5.84975
Lee, Y. K., Yang, S. H., Lee, J. K., & Lee, C. B. 2014, Evaluation of daily jump compensation methods for GPS carrier phase data, In 29th Conference on Precision Electromagnetic Measurements (CPEM 2014), 24-29 August 2014, Rio de Janeiro, Brazil, pp.152-153. https:// doi.org/10.1109/cpem.2014.6898304
Meynadier, F., Esteban, H., & Sesia, I. 2019, Summary for the GSOP 2019 TWSTFT calibration report, Real Instituto y Observatorio de la Armada (ROA), ROA/GAL-TN-ROAGSOP-2019001. https://webtai.bipm.org/ftp/pub/tai/publication/time-calibration/Current/0503-2019_TW_ OP_v1-0.pdf
NovAtel, OEM719 Product Sheet, D21049 Version 9, 27 July 2023. https://hexagondownloads.blob.core.windows.net/public/Novatel/assets/Documents/Papers/ OEM719-Product-Sheet/OEM719-Product-Sheet.pdf
Sekido, M., Takiguchi, H., Hobiger, T., Ichikawa, R., Fujieda, M., et al. 2012, VLBI Application for time and frequency transfer and comparison with other techniques, August 2012, IAU Joint Discussion 7: Space-Time Reference Systems for Future Research at IAU General AssemblyBeijing, p.11. http://referencesystems.info/iau-jointdiscussion-7.html
Takiguchi, H., Koyama, Y., Ichikawa, R., Gotoh, T., Ishii, A., et al. 2008, VLBI measurements for time and frequency transfer, Conference: Proc. of the European Frequency and Time Forum 2008, 1, January 2008.
TimeTech GmbH 2012, Satellite Time Transfer and Ranging Equipment (SATRE) Datasheet. https://www.ion.org/ ptti/upload/files/1039_10139_Datasheet.pdf
Yang, S. H., Lee, C. B., Lee, J. K., Lee, Y. K., & Lee, S. J. 2009, Multi-channel Two-Way Time Transfer Using a Communication Satellite, Journal of Institute of Control, Robotics and Systems, 15, 346-352. https://doi. org/10.5302/j.icros.2009.15.3.346
Conceptualization & methodology & software, J. Lee; formal analysis & investigation, J. K. Lee; writing, J. Lee, J. I. Oh; review and editing, J. H. Rhee, G. W. Choi; supervision, Y. K. Lee; project administration, S. H. Yang.
The authors declare no conflict of interest.