›› 2011, Vol. 31 ›› Issue (4): 23-29.doi: 10.3780/j.issn.1000-758X.2011.04.004

• 第二届中国卫星导航学术年会论文 • 上一篇    下一篇

双向时间同步系统的设备时延校准技术研究

李星1, 耿淑敏2, 李垣陵3   

  1. (1 北京跟踪与通信技术研究所,北京 100094)(2 63999部队,北京 100094)
    (3 国防科学技术大学电子科学与工程学院,长沙 410073)
  • 收稿日期:2011-03-21 修回日期:2011-04-11 出版日期:2011-08-25 发布日期:2011-08-25
  • 作者简介:李 星 1980年生,2009年获国防科学技术大学信息与通信工程专业博士学位,工程师。主要研究方向为卫星导航。

Equipment Delay Calibration Technique for Two-way Time Synchronization System

 LI  Xing1, GENG  Shu-Min2, LI  Yuan-Ling3   

  1. (1 Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094)
    (2 Army 63999, Beijing 100094) (3 National University of Defense Technology, Changsha 410073)
  • Received:2011-03-21 Revised:2011-04-11 Online:2011-08-25 Published:2011-08-25

摘要: 设备时延校准误差是卫星导航系统中伪码测距实现双向时间同步的重要误差因素,其精确校准是实现时间同步的关键技术。针对设备时延问题展开研究,提出了一种物理含义清晰、易于测量的设备时延的新定义。设计实现了一种双向时间同步系统的设备时延校准方案,基于时间同步站硬件平台验证了设备时延校准的有效性,试验结果表明时延校准的精度与准确度达到了亚纳秒量级。

关键词: 伪码测距, 设备时延校准, 双向时间同步, 卫星导航

Abstract: Equipment delay error is an important factor to implement two-way time synchronization in pseudo-noise code ranging system. And the accurate calibration is the key technology to reach a good time synchronization. Regarding to  the equipment time delay, a new  definition of equipment time delay with clear physical meaning was proposed. A scheme implementing delay calibration in two-way time synchronization was designed. The delay calibration technique was validated on the hardware platform of time synchronization station. And the experiment results show that the precision and accuracy of delay calibration reaches sub-nanosecond level.

Key words: Pseudo-noise code ranging, Equipment delay calibration, Two-way time synchronization, Satellite navigation