中国物理B ›› 2021, Vol. 30 ›› Issue (8): 80601-080601.doi: 10.1088/1674-1056/ac05a6

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Real-time frequency transfer system over ground-to-satellite link based on carrier-phase compensation at 10-16 level

Hui-Jian Liang(梁慧剑)1,2, Shi-Guang Wang(王时光)2,3,†, Yu Bai(白钰)2,3, Si-Chen Sun(孙思忱)2,3, and Li-Jun Wang(王力军)1,2,3,4,‡   

  1. 1 Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
    2 State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China;
    3 Department of Precision Instruments, Tsinghua University, Beijing 100084, China;
    4 Department of Physics, Tsinghua University, Beijing 100084, China
  • 收稿日期:2021-04-06 修回日期:2021-05-20 接受日期:2021-05-27 出版日期:2021-07-16 发布日期:2021-08-02
  • 通讯作者: Shi-Guang Wang, Li-Jun Wang E-mail:wangsg@tsinghua.edu.cn;lwan@tsinghua.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302101) and the Initiative Program of State Key Laboratory of Precision Measurement Technology and Instruments.

Real-time frequency transfer system over ground-to-satellite link based on carrier-phase compensation at 10-16 level

Hui-Jian Liang(梁慧剑)1,2, Shi-Guang Wang(王时光)2,3,†, Yu Bai(白钰)2,3, Si-Chen Sun(孙思忱)2,3, and Li-Jun Wang(王力军)1,2,3,4,‡   

  1. 1 Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;
    2 State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China;
    3 Department of Precision Instruments, Tsinghua University, Beijing 100084, China;
    4 Department of Physics, Tsinghua University, Beijing 100084, China
  • Received:2021-04-06 Revised:2021-05-20 Accepted:2021-05-27 Online:2021-07-16 Published:2021-08-02
  • Contact: Shi-Guang Wang, Li-Jun Wang E-mail:wangsg@tsinghua.edu.cn;lwan@tsinghua.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0302101) and the Initiative Program of State Key Laboratory of Precision Measurement Technology and Instruments.

摘要: We demonstrate a novel and stable frequency transfer scheme over ground-to-satellite link based on real-time carrier-phase detection and compensation. We performed a zero-baseline measurement with the designed system, an uninterrupted frequency standard signal is recovered in the reception station without additional post-correction of delay error caused in the route, which is because the phase error of the entire route is tracked and compensated continuously in real-time. To achieve this goal, we employed two carriers in the system and the differential signal is transferred in order to eliminate the instability results from the local oscillator at the satellite transponder as well as the common-mode noise induced in the transfer route and microwave components. The stability of 3×10-16 with an integration time of 1 day was achieved and the time fluctuation during one day was measured to be about ±20 ps. Error sources and possible solutions are discussed. Our zero-baseline method shows a promising result for real-time satellite-based time and frequency transfer and deserves further research to find whether it works between long-baseline stations.

关键词: frequency transfer, ground-to-satellite link, carrier-phase compensation

Abstract: We demonstrate a novel and stable frequency transfer scheme over ground-to-satellite link based on real-time carrier-phase detection and compensation. We performed a zero-baseline measurement with the designed system, an uninterrupted frequency standard signal is recovered in the reception station without additional post-correction of delay error caused in the route, which is because the phase error of the entire route is tracked and compensated continuously in real-time. To achieve this goal, we employed two carriers in the system and the differential signal is transferred in order to eliminate the instability results from the local oscillator at the satellite transponder as well as the common-mode noise induced in the transfer route and microwave components. The stability of 3×10-16 with an integration time of 1 day was achieved and the time fluctuation during one day was measured to be about ±20 ps. Error sources and possible solutions are discussed. Our zero-baseline method shows a promising result for real-time satellite-based time and frequency transfer and deserves further research to find whether it works between long-baseline stations.

Key words: frequency transfer, ground-to-satellite link, carrier-phase compensation

中图分类号:  (Time and frequency)

  • 06.30.Ft
07.50.-e (Electrical and electronic instruments and components) 06.20.fb (Standards and calibration)