宇航计测技术 ›› 2025, Vol. 45 ›› Issue (1): 73-78.doi: 10.12060/j.issn.1000-7202.2025.01.13

• 精密测试技术 • 上一篇    下一篇

卫星双向链路辅助计算的光纤时频传递链路噪声计算方法

李启增2，李骁逸1,*，张耀宗1，晏行伟2，3，崔星1   

  1. 1.中国北方车辆研究所，北京 100071；

    2.天津先进技术研究院，天津 300459；

    3.国防科技大学，长沙 410073
  • 出版日期:2025-03-15 发布日期:2025-03-27
  • 作者简介:李启增(1996-)，男，工程师，学士，主要研究方向：时间频率传递技术。
  • 基金资助:
    国家部委技术预研项目（LZY2023043022）资助。

A Noise Correction Method For Fiber Optic Time-frequency Transfer Link Assisted by Two-way Satellite Transfer

LI Qizeng2，LI Xiaoyi1,*，ZHANG Yaozong1，YAN Xingwei2,3,CUI Xing1   

  1. 1.China North Vehicle Research Institute，Beijing 100073，China;

    2.Tianjin Institute of Advanced Technology，Tianjin 300459，China;

    3.National University of Defense Technology,Changsha 410073,China

  • Online:2025-03-15 Published:2025-03-27

PDF (PC)

摘要： 包含链路噪声的原子钟钟差数据总和噪声序列加权平均的链路噪声计算方法对于具有往复波动特征的链路噪声，理论上具有百分之百的校正效果。但对于不具有这一特征，或波动周期极长的链路噪声，该方法不能有效校正。因此该方法无法直接用于计算光纤时频传递链路的链路噪声。但若通过卫星双向时频传递链路，求得异地站之间的氢原子钟初始相位差、频差和频漂，即可解决这一问题，从而通过该方法求得光纤时频传递链路的链路噪声。仿真计算表明，将链路噪声计算偏差降低至0.1 ns以下，需要每个地面站中至少6台氢原子钟参与计算。该方法可以通过增加参与计算的原子钟数目，使计算偏差无限趋近于零。

关键词: 光纤, 时间传递, 噪声

Abstract: The link noise computing method of total noise weighted average has realized the 100% correction of link noises which have reciprocating fluctuation characteristics in theory.For link noises without such characteristics or those with extremely long fluctuation periods，the method cannot provide effective correction.Therefore，this method cannot be directly used to calculate the link noise of fiber optic time-frequency transfer link.But this method could be used for fiber optic time-frequency transfer link，if the initial phase difference，frequency difference，and frequency drift difference between the atomic clocks in different station had been calculated out by two-way satellite time-frequency transfer.Through simulation，reduce the calculation deviation of link noise to 0.1 ns，at least 6 atomic clocks are required.By increasing the number of atomic clocks involved in the calculation，this method can infinitely approach zero in calculation bias.

Key words: Fiber optic, Time transfer, Noise

中图分类号: 

京ICP备09048426号-4　 京公网安备 11010602060144号　版权所有 © 《宇航计测技术》编辑部