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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 曹恆偉(Hen-Wai Tsao) | |
| dc.contributor.author | Yi-Jiun Huang | en |
| dc.contributor.author | 黃毅軍 | zh_TW |
| dc.date.accessioned | 2021-06-17T02:14:35Z | - |
| dc.date.available | 2018-01-04 | |
| dc.date.copyright | 2018-01-04 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-11-10 | |
| dc.identifier.citation | [1] Resolution 1 of the 13th Conference Generale des Poids et Mesures (CGPM), 1967.
[2] T. Parker, “Long-term comparison of caesium fountain primary frequency standard,” Metrologia, vol. 47, pp. 1–10, 2010. [3] C. Thomas, P. Wolf and P Tavella, Time Scales, Monographie: Bureau International des Poids et Mesures, 1994. [4] G. Petit, “A new realization of Terrestrial Time,” in Proc. 35th PTTI, pp. 307–16, 2003 [5] G. Panfilo and E. F. Arias “Studies and possible improvements on the EAL algorithm,” IEEE Trans. UFFC, vol. 57, no. 1, pp. 154–60, 2010 [6] G. Panfilo, “Algorithms for TAI ,” IEEE Trans. UFFC, vol. 57, pp. 140–50, 2010. [7] CCTF WGMRA Guideline 7: Guidelines for participation in the ongoing key comparison in time CCTF-K001.UTC, 2015. [8] G. Panfilo, A. Harmegnies and L. Tisserand, “A new weighting procedure for UTC,” Metrologia, vol. 51, no. 2, pp. 285-292, 2014. [9] Resolution 1 of the 17th Conference Generale des Poids et Mesures (CGPM), 1983. [10] BIPM, “EXPLANATORY SUPPLEMENT OF BIPM CIRCULAR T,” 2017. ftp://ftp2.bipm.org/pub/tai/publication/notes/explanatory_supplement_v0.1.pdf [11] Z. Jiang, D. Matsakis, V. S. Zhang, H. Estoban, D. Piester and S.-Y. Lin, “A TWSTFT calibration guideline and the use of a GPS calibrator for UTC TWSTFT link calibration,” in Proc. 2016 PTTI, Monterey, CA, USA, 2016. [12] CCTF WGMRA Guideline 8: Contribution of time laboratories to UTC, 2015. [13] Circular T 337. ISSN 1143-1393, Bureau international des poids et mesures, Sèvres, France, 2016. [14] TL Annal report, 2016. [15] S.-Y. Lin, W.-H. Tseng, H.-T. Lin, Y.-J. Huang and K.-M. Feng, “Long-term inconsistency between TWSTFT and GPS time transfer results in PTB-TL and NICT-TL time links,” in Proc. 24th EFTF, Noordwijk, Netherlands, 13-16 Apr. 2010, 2010. [16] M. Fujieda, D. Piester, T. Gotoh, J. Becker, M. Aida and A. Bauch, “Carrier-phase two-way satellite frequency transfer over a very long baseline,” Metrologia, vol. 51, pp. 253–262, 2014. [17] Z. Jiang, A. Czubla, J. Nawrocki, W. Lewandowski and E. F. Arias, “Comparing a GPS time link calibration with an optical fibre self-calibration with 200 ps accuracy,” Metrologia, vol. 52, pp. 384–391, 2015. [18] P. Delva, F. Meynadier, C. Le Poncin-Lafitte, P. Laurent and P. Wolf, “Time and frequency transfer with a MicroWave Link in the ACES/PHARAO mission,” in Proc. EFTF 2012, Gothenburg, Sweden, Apr. 2012. [19] K. Senior et al., “Developing an IGS Time Scale,” IEEE Trans. UFFC, vol. 50, no. 6, pp. 585–593, Jun. 2003. [20] G. Petit, A. Kanj, S. Loyer, J. Delporte, F. Mercier and F. Perosanz, “1 × 10−16 frequency transfer by GPS PPP with integer ambiguity resolution”, Metrologia, vol. 52, pp. 301–309, 2015. [21] J. Yao, I. Skakun, Z. Jiang and J. Levine, “A detailed comparison of two continuous GPS carrier-phase time transfer techniques,” Metrologia, vol. 52, no. 5, pp. 666-676, 2015. [22] W. Lewandowski, D. Matsakis, G. Panfilo and P. Tavella, “The evaluation of uncertainties in UTC-UTC(k),” Metrologia, vol. 43, pp. 278-286, 2006. [23] D. Piester, A. Bauch, L. Breakiron, D. Matsakis, B. Blanzano and O. Koudelka, “Time transfer with nanosecond accuracy for the realization of International Atomic Time,” Metrologia, vol. 45, pp. 185-198, 2008. [24] International Telecommunication Union 2015 “The operational use of two-way satellite time and frequency transfer employing pseudorandom noise codes,” Recommendation ITU-R TF.1153-4 (Geneva: International Telecommunication Union) [25] D. Kirchner, “Two-Way Time Transfer via Communication Satellites,” Proceedings of the IEEE, vol. 79, no. 7, pp. 983-990, 1991. [26] F. G. Ascarrunz, S. R. Jefferts and T. E. Parker, “Earth Station Errors in Two-Way Time and Frequency Transfer,” IEEE Trans. IM, vol.46, no. 2, pp. 205-208,Apr. 1997. [27] T. E. Parker and V. S. Zhang, “Source of instabilities in two-way satellite time transfer,” in Proc. Joint 2005 IEEE IFCS and 37th PTTI Meeting, pp. 745-751, 2005. [28] M. Fujieda, M. Aida, H. Maeno, L. Q. Tung and J. Amagai, “Delay Difference Calibration of TWSTFT Earth Station Using Multichannel Modem,” IEEE Trans. IM, vol. 56, no. 2, pp. 346-350, Apr. 2007. [29] M. Fujieda, T. Gotoh, M. Aida, J. Amagai, H. Maeno, D. Piester, A. Bauch and S. H. Yang, “Long-Baseline TWSTFT between Asia and Europe,” in Proc. of the 38th PTTI Meeting, 5-7 Dec. 2006, Reston, Virginia, USA, pp. 499-504. [30] D. Piester, A. Bauch, M. Fujieda, T. Gotoh, M. Aida, H. Maeno, M. Hosokawa, and S. H. Yang, “Studies on Instabilities in Long-Baseline Two-Way Satellite Time and Frequency Transfer (TWSTFT) Including a Troposphere Delay Model,” in Proc. 39th PTTI Meeting, 27-29 Nov. 2007, Long Beach, California, USA, pp. 211-222. [31] M. Fujieda, D. Piester, T. Gotoh, J. Becker, M. Aida and A. Bauch, “Carrier-phase two-way satellite frequency transfer over a very long baseline,” Metrologia, vol. 51, pp. 253–262, 2014. [32] D. A. Howe, “Time Tracking Error in Direct-Sequence Spread-Spectrum Networks Due to Coherence Among Signals”, IEEE Trans. Comm., vol. 38, no. 12, pp. 2103 - 2105, Dec. 1990. [33] G. Hejc and W. Schaefer, “Tracking Biases Caused By Imperfections in DLL Receivers,” in Proc. 41st PTTI Meeting, Santa Ana Pueblo, New Mexico, Nov. 2009, pp. 551–558. [34] J. K. Holmes, Spread Spectrum Systems for GNSS and Wireless Communications. Boston, USA: Artech House, 2007. [35] S. Zhang, X. Wang, H. Wang, H. Wang, Y. Yuan and K. Feng, “A new modem for two way satellite time and frequency transfer,” in Proc. 2015 Joint Conference of the IEEE IFCS and EFTF, Denver, CO, 2015, pp. 250-253. doi: 10.1109/FCS.2015.7138834 [36] M. Wouters and L. Marais, “Time-transfer over optical fibre using pseudo-random noise ranging,” in Proc. 2014 EFTF, Neuchâtel, Switzerland, 23-26 June 2014, pp. 308–311, 2014. [37] M. Imae, “Basic Measurement Techniques on Time and Frequency Transfer,” Journal of the NICT, vol. 50, no. 1/2, pp. 105–112, 2003. [38] Timetech GmbH, SATRE modem specification ( http://www.timetech.de/datasheet/10139_Datasheet.pdf ) [39] Y.-J. Huang and H.-W. Tsao, “Design and Evaluation of an Open-Loop Receiver for TWSTFT Applications,” IEEE Trans. IM, vol. 64, no. 5, pp. 1553–1558, 2015. [40] F.-D. Chu, W.-H. Tseng, W.-C. Hsu and P.-Y. Ting, “A study of antenna multipath instabilities in two-way satellite time and frequency transfer,” in Proc. 2014 IEEE IFCS, Taipei, Taiwan, 19-22 May 2014, pp. 1–4, 2014. [41] A. J. van Dierendonck, P. Fenton and T. Ford, “Theory and Performance of Narrow Correlator Spacing in a GPS Receiver,” Navigation, Vol. 39, No. 3, pp 265-283, 1992. [42] G. A. McGraw and M. S. Braasch, “GNSS Multipath Mitigation Using Gated and High Resolution Correlator Concepts,” in Proc. National Technical Meeting of the Satellite Division of the Institute of Navigation, San Diego, USA, January 1999. [43] USRP N210 specification, Ettus Research (www.ettus.com/product/details/UN210-KIT) [44] Nitsuki Model 9270 (VSSP32), Japan Communication Equipment Co., Ltd., http://www.nitsuki.com/products/microwave/9270_sampler.html [45] J. Sherman and R. Jördensb, “Oscillator metrology with software defined radio,” Review of Scientific Instruments 87, 054711 (2016); doi: http://dx.doi.org/10.1063/1.4950898 [46] CUDA, Nvidia ( https://developer.nvidia.com/cuda-zone ) [47] N. Levanon and E. Mozeson, Radar Signals, Wiley-IEEE Press, June 2004. [48] Y.-J. Huang, H.-W. Tsao, H.-T. Lin and C.-S. Liao, “Multiple Access Interference Suppression for TWSTFT Applications,” IEEE Trans. IM, vol. 66, issue 6, pp. 1337–42, June 2017. DOI: 10.1109/TIM.2016.2624900 [49] P. Patel, and J. Holtzman. “Analysis of a simple successive interference cancellation scheme in a DS/CDMA system.” IEEE journal on selected areas in communications 12.5 (1994): 796-807. [50] Y. Saito, Y. Kishiyama, A. Benjebbour, T. Nakamura, A. Li and K. Higuchi, “Non-orthogonal multiple access (NOMA) for cellular future radio access,” in Proc. IEEE Vehicular Technology Conference, Dresden, Germany, Jun. 2013. [51] Y.-J. Huang, M. Fujieda, H. Takiguchi, W.-H. Tseng and H.-W. Tsao, “Stability improvement of an operational two-way satellite time and frequency transfer system,” Metrologia, vol, 53, no. 2, pp. 881–890, 2016. [52] W. J. Riley, “Handbook of Frequency Stability Analysis,” National Institute of Standards and Technology Special Publication 1065. [53] Y.-J. Huang, W.-H. Tseng, S.-Y. Lin, S. Yang and M. Fujieda, “Introduction of Software-Defined Receivers in Two-Way Satellite Time and Frequency Transfer,” in Proc. 2016 IEEE IFCS, New Orleans, LA, USA, 9-12 May 2016 [54] Y.-J. Huang, W.-H. Tseng, S.-Y. Lin, S. Yang and M. Fujieda, “TWSTFT Results by Using Software-Defined Receiver Data,” in Proc. 2016 EFTF, York, UK, 4-7 Apr. 2016. [55] V. S. Zhang and T. E. Parker, “A Study of the Diurnal in the Transatlantic TWSTFT Difference,” in Proc. 2013ATF Workshop,2013 [56] V. S. Zhang, T. E. Parker, J. Achkar, D. Piester, Y.-J. Huang, S.-Y. Lin and Z. Jiang, “A Study on Using SDR Receivers for the Europe-Europe and Transatlantic TWSTFT Links,” in Proc. ITM/PTTI 2017, Monterey, CA, USA, 30 Jan. - 2 Feb. 2017. [57] Linear-feedback shift register ( https://en.wikipedia.org/wiki/Linear-feedback_shift_register ) [58] D. Piester, A. Bauch, J. Becker, E. Staliuniene and C. Schlunegger, “On Measurement Noise in the European TWSTFT Network,” IEEE Trans. UFFC, vol. 55, no. 9, Sep. 2008. [59] V. S. Zhang, T. E. Parker, D. Matsakis, J. Achkar, D. Rovera, D. Piester, A. Bauch and L. Lorini, “Two-Way Satellite Time and Frequency Transfer Using 1 MChips/s Codes,” in Proc. 41st PTTI Meeting, 16-19 Nov. 2009, Santa Ana Pueblo, New Mexico, USA, pp. 371-382. [60] T. Gotoh, J. Amagai, T. Hobiger, M. Fujieda and M. Aida, “Development of a GPU-based two-way time transfer modem,” IEEE Trans. IM, vol. 60, no. 7, pp. 2495–2499, Jul. 2011. [61] H.-T. Lin, Y.-J. Huang, W.-H. Tseng, C.-S. Liao and F.-D. Chu, “Recent Development and Utilization of Two-Way Satellite Time and Frequency Transfer,” MAPAN - Journal of Metrology Society of India, vol. 27, issue. 1, pp 13-22, Mar. 2012. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68198 | - |
| dc.description.abstract | 國際度量衡局(Bureau international des poids et mesures, BIPM)根據各國家計量機構(National Metrology Institute, NMI)所維持原子鐘的穩定性，權衡產生國際協調時(Coordinated Universal Time, UTC)，是時間的國際標準。雙向衛星時頻傳遞(Two-Way Satellite Time and Frequency Transfer, TWSTFT)能夠測量國際之間兩個NMI標準時間差，是國家標準時間同步UTC的方法之一。周日效應是TWSTFT主要的測量誤差，會導致測量值以日為週期有數百皮秒的起伏變化，在文獻上，其原因可能來自衛星地面站設備延遲的變化、信號雙向傳播時間延遲的變化、以及TWSTFT接收機的測量誤差等，然而確切的原因並未明朗。
TWSTFT的運作為，兩個NMI藉由衛星通訊發射擬似亂(Pesudo-Random Noise, PRN)碼信號，並測量對方信號的抵達時間(Time of Arrival, TOA)。鎖延遲迴路(Delay-Locked Loop, DLL)是現有接收機的測量TOA的方法，可能造成穩態誤差和拉回誤差，另外，多路徑干擾和多重接取干擾也可能造成測量誤差。為了避免這些誤差，本論文使用軟體無線電(Software-Defined Radio, SDR)搭配GPU平行運算單元設計PRN碼接收機，使用開路測量取代DLL；另外，藉由SDR接收機更高的取樣速率，實現了窄距相關器以抑制多路徑干擾；再者，藉由SDR接收機豐富的資源，實現即時繼次干擾消除(Successive Interference Cancellation, SIC)以抑制多重接取干擾。 為了測試SDR接收機是否能降低TWSTFT測量誤差，在中華電信研究院(Telecommunication Laboratories, TL)測量兩台原子鐘的時間差，結果現有接收機呈現周日效應，而SDR接收機則無；接著測試SDR是否能提升國際時頻傳遞穩定性，在日本情報通信研究機構(National Institute of Information and Communications Technology, NICT)以及韓國標準科學研究院(Korea Research Institute of Standards and Science, KRISS)現有的TWSTFT系統上附加SDR接收機，測量NICT-TL和KRISS-TL的時間差，現有接收機呈現了明顯的周日效應，而SDR接收機則無，另外，KRISS-TL啟動了SIC抑制多重接取干擾進而提升了短期穩定性。有鑒於SDR接收機能改善周日效應，BIPM與時頻諮議會(Consultative Committee for Time and Frequency, CCTF)為了提升UTC的準確性，成立了先鋒研究團隊 (Pilot Study Group, PSG)，在國際上十餘個NMI的現有TWSTFT系統上附加SDR接收機，根據數個月的測量結果，使用SDR接收機都能提升短期穩定性，特別在幾個時頻傳遞結果上，明顯看出SDR接收機改善了周日效應。 | zh_TW |
| dc.description.abstract | The Bureau international des poids et mesures (BIPM) generates Coordinated Universal Time (UTC) by weighting the atomic clocks in several National Metrology Institutes (NMIs). This relies on time transfer techniques to obtain the time differences between atomic clocks in different places. Two-way satellite time and frequency transfer (TWSTFT) is a time transfer technique that has been used for several NMIs to synchronize their local realizations with UTC. However, as atomic clocks become more stable, the stability of TWSTFT must improve. The time-difference fluctuations with a period of one day, which are known as the diurnal effect, make it difficult to increase this stability. Previous studies have shown that this effect may be caused by unstable radio-frequency (RF) components, unequal propagation delays between two paths, or inaccurate measurement in TWSTFT receivers. However, the dominant factor has not been identified.
This dissertation focuses on the measurement algorithm for TWSTFT receivers. During TWSTFT, each NMI receives pseudo-random noise codes that are transmitted from the others via a satellite link and then measures the times of arrival (TOAs) using a receiver. The conventional algorithm uses two correlators and a delay-locked loop (DLL). Using the DLL, the dynamic behavior of the TOA can produce steady-state and pull-in errors that make the measurement inaccurate. The multipath error and multiple access interference (MAI) are difficult to mitigate due to that limitations of hardware resources. Therefore, a TWSTFT receiver that uses a software-defined radio (SDR) technique is proposed. The receiver comprises an analog-to-digital conversion sampler and a computer with a graphic processing unit (GPU) board. The SDR receiver implements the algorithm, including the multiple correlator and the open-loop scheme. The high-resolution correlator and the successive interference cancellation (SIC) respectively mitigate multipath effect and MAI use parallel computation that is provided by the GPU board. For evaluation purposes the SDR receivers are installed in three Asia-Pacific NMIs – TL in Taiwan, NICT in Japan, and KRISS in South Korea – for comparison with currently used receivers. There is clear suppression of the diurnal effect in the TWSTFT between TL and KRISS. The multichannel property of the SDR receiver is enabled a two-by-two TWSTFT for TL and NICT and an unstable amplifier is identified. When the amplifier is removed, the stability of time transfer between TL and NICT is improved. Because of this improvement, the BIPM and the Consultative Committee for Time and Frequency (CCTF) working group on TWSTFT launched a project to install the SDR receivers in NMIs in Asia, Europe and the USA to generate UTC. Twelve NMIs, which have a total weight of about 40% in UTC, are operating the receiver. Most TWSTFT results show an improvement in short-term stability. In particular, some exhibit clear mitigation of the diurnal effect. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T02:14:35Z (GMT). No. of bitstreams: 1 ntu-106-D02942009-1.pdf: 3365343 bytes, checksum: 0d41fd3c5f9ed800b7c58ae596cf0bf1 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 摘要 II
Abstract IV List of Figures VIII List of Tables XII Acronyms XIII Chapter 1: An Introduction to Standard Time 1 1.1 Standard Time and Time Transfer 1 1.2 Stable Time Transfer for Synchronizing UTC 5 1.3 Maintenance of the UTC(k) by International Time Transfer 7 Chapter 2: Two-Way Satellite Time and Frequency Transfer 11 2.1 Two-Way Time Transfer 11 2.2 The Operation of TWSTFT 13 2.3 TWSTFT Earth Stations 14 2.4 The Diurnal Effect 16 2.5 Considerations on Improving TWSTFT Stabilities 20 Chapter 3: Currently Used TWSTFT Receivers 22 3.1 Signal Model 22 3.2 The Delay-Locked Loop in Currently Used Receivers 24 3.3 Steady-State and Pull-in Errors in the DLL 25 3.4 Multipath Effect 31 3.5 Multiple Access Interference 35 Chapter 4: Design for a SDR TWSTFT Receiver 39 4.1 Data Receiver vs Time Transfer Reciver 39 4.2 The Software-Defined Radio Receiver 41 4.3 RF Front-End Configurations 43 4.4 The Proposed Algorithm for Accuracy Improvement 45 4.5 The Effect of Random Noises on Accuracy 49 4.6 Signal Acquisition 51 4.7 The Suppression of MAI 54 4.8 Parallel Compulation for Multiple Reception Channels 56 Chapter 5: Evaluation of the SDR Receiver 59 5.1 TWSTFT with Co-Located Stations [39] 59 5.2 Asia-Pacific TWSTFT 62 5.2.1 NICT-TL [51] 63 5.2.2 KRISS-TL [48] 67 5.3 Europe-USA TWSTFT 70 5.4 Europe-Asia TWSTFT 74 Chapter 6: Conclusion and Prospects 77 Reference 80 Appendix A: Characterization of Phase Fluctuations 84 Appendix B: Pseudo-Random Noise Codes for TWSTFT 87 Appendix C: The Modified HRC 89 | |
| dc.language.iso | en | |
| dc.subject | 信號抵達時間測量 | zh_TW |
| dc.subject | 分碼多工 | zh_TW |
| dc.subject | 衛星通訊 | zh_TW |
| dc.subject | 鎖延遲迴路 | zh_TW |
| dc.subject | 時間傳遞 | zh_TW |
| dc.subject | 軟體定義無線電 | zh_TW |
| dc.subject | 校正 | zh_TW |
| dc.subject | Time of arrival estimation | en |
| dc.subject | Calibration | en |
| dc.subject | Time dissemination | en |
| dc.subject | Delay lock loops | en |
| dc.subject | Code division multiaccess | en |
| dc.subject | software-defined radio | en |
| dc.subject | Satellite communication | en |
| dc.title | 一種用於雙向衛星時頻傳遞之軟體定義無線電接收機 | zh_TW |
| dc.title | Design of a Software-Defined Radio Receiver for Two-Way Satellite Time and Frequency Transfer Applications | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 106-1 | |
| dc.description.degree | 博士 | |
| dc.contributor.oralexamcommittee | 吳靜雄(Jingshown Wu),蔡志宏(Zsehong Tsai),朱延祥(Yen-Hsyang Chu),楊文豪(Wen-Hao Yang),廖嘉旭(Chia-Shu Liao) | |
| dc.subject.keyword | 信號抵達時間測量,校正,時間傳遞,分碼多工,鎖延遲迴路,衛星通訊,軟體定義無線電, | zh_TW |
| dc.subject.keyword | Time of arrival estimation,Calibration,Time dissemination,Code division multiaccess,Delay lock loops,Satellite communication,software-defined radio, | en |
| dc.relation.page | 90 | |
| dc.identifier.doi | 10.6342/NTU201704354 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-11-13 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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