光纤时间传递系统中时钟驯服模块的设计和实现Design and realization of a disciplined clock module used in time transfer system with optical fiber
朱少华;卢麟;张宝富;朱勇;吴传信;
摘要(Abstract):
提出了一种基于光纤时间传递系统的时钟驯服模块设计方案。介绍了系统硬件的组成。在对信道特性和压控晶振进行理论和实验分析的基础上,设计实现了适用于光纤信道特性的卡尔曼滤波算法以及驯服流程控制程序。实验测试表明:该模块能结合恒温晶振短期稳定度好和光纤时间传递系统秒脉冲长期稳定度好的优点,时间传递的精度优于0.25ns(1σ),输出的秒脉冲的长期稳定度优于10-14。
关键词(KeyWords): 光纤时间传递;时钟驯服;卡尔曼滤波
基金项目(Foundation): 国家自然科学基金资助项目(61174199)
作者(Author): 朱少华;卢麟;张宝富;朱勇;吴传信;
Email:
DOI: 10.13875/j.issn.1674-0637.2011.02.004
参考文献(References):
- [1]IMAOKA A,KIHARA M.Time signal distribution in communication networks based on synchronous digital hierarchy[J].IEEETransactions on Communications,1997,45(2):247-253.
- [2]张大元,谢毅,孟艾立,等.利用光纤数字同步传送网2.048Mbit/s支路传送高精度标准时间信号[J].现代电信技术,2006,12:17-25.
- [3]IMAOKA A,KIHARA M.Accurate time/frequency transfer method using bidirectional WDM transmission[J].IEEE Transactionon Instrumentation and Measurement,1998,47(2):537-542.
- [4]AMEMIYA M,IMAE M.Time and frequency transfer and dissemination methods using optical fiber network[J].IEEJ Transactionson Fundamentals and Materials,2006,126(6):458-463.
- [5]WELCH G,BISHOP G.An introduction to the Kalman filter[R].Carolina:Proc of SIGGRAPH,2004.