原子钟两级驾驭算法及在建立GNSS时间基准中的应用

doi:10.3969/j.issn.0372-2112.2016.07.032

电子学报 ›› 2016, Vol. 44 ›› Issue (7): 1742-1750.DOI: 10.3969/j.issn.0372-2112.2016.07.032

原子钟两级驾驭算法及在建立GNSS时间基准中的应用

伍贻威, 龚航, 朱祥维, 刘文祥, 欧钢

国防科技大学电子科学与工程学院, 湖南长沙 410073

收稿日期:2015-05-19 修回日期:2015-12-14 出版日期:2016-07-25
- 通讯作者:
- 朱祥维
- 作者简介:
- 伍贻威 男,1987年出生于上海市,博士生.分别于2009年6月和2011年12月获得国防科技大学工学学士和工学硕士学位.主要研究方向为GNSS时间基准的建立与维持.到目前为止,以第一作者在IEEETransactionsonInstrumentationandMeasurement和Metrologia等国际期刊上发表论文4篇.E-mail:Yiwei_Wu_sh@126.com;龚航男,1984年出生于江苏徐州,博士、讲师.主要研究方向为原子钟与时间频率技术.E-mail:gong_hang@163.com;刘文祥 男,1981年出生于江西宜春,博士、副研究员.主要研究方向为卫星导航定位解算与完好性监测技术.E-mail:liuwenxiang8888@163.com;欧钢男,1969年出生于湖南株洲,博士、教授、博士生导师.主要研究方向为GNSS信号处理、信息处理、接收机技术等.E-mail:ougang1969@163.com

Twice Atomic Clock Steering Algorithm and Its Application in Forming a GNSS Time Reference

WU Yi-wei, GONG Hang, ZHU Xiang-wei, LIU Wen-xiang, OU Gang

School of Electronic Science and Technology, National University of Defense Technology, Changsha, Hunan 410073, China

Received:2015-05-19 Revised:2015-12-14 Online:2016-07-25 Published:2016-07-25

摘要/Abstract

摘要：

本文提出了一种原子钟驾驭算法,方法是使用等价于Kalman滤波器加延迟器的数字锁相环(DPLL).本文完整地推导了DPLL的闭环系统传递函数和闭环误差传递函数,给出了其实现结构,和每次的对于被驾驭原子钟的调整量,并给出了使DPLL输出信号的频率稳定度最优的参数选取方法.在此基础上,提出了使用两个这样的DPLL级联起来的二级驾驭算法.理论分析和仿真实验都表明:该算法相比传统原子钟驾驭算法,参数选取更容易,可以保证输出信号的频率稳定度最优;并保证输出信号与第一级的参考输入保持时间同步.该两级驾驭算法可以应用于设计锁相振荡器,即先用铯钟驾驭氢钟,然后再驾驭数控振荡器(NCO);也可以应用于建立GNSS时间基准,即先用UTC(BSNC)驾驭产生BDT,然后再用BDT驾驭主控站主钟来产生BDT(MC).

关键词: 原子钟驾驭, 数字锁相环, Kalman滤波器, 频率稳定度

Abstract:

An atomic clock steering algorithm is proposed by utilizing a DPLL equivalent to a Kalman filter with a delay.The close-loop system transfer function and the close-loop error transfer function are derived.The implement structure of the DPLL,and the adjustment to the atomic clock to be steered in each time are shown.A method for choosing the parameter such that the output frequency stability is optimal is also carried out.Then,a twice steering algorithm by means of two same DPLLs in the cascade form is proposed.The theoretical analyses and simulations all indicate that it is easier to choose parameters in the algorithm than the traditional algorithms,the output synchronizes to the first input and its frequency stability is optimal.The twice steering algorithm is useful for designing the phase-locked oscillator,where the number-controlled oscillator is first steered to a hydrogen maser and then steered to a cesium clock.The algorithm is also useful for forming a GNSS time.The method first steers BDT to UTC(BSNC),and then steers BDT(MC) to the steered BDT.

Key words: atomic clock steering, digital phase locked loop, Kalman filter, frequency stability

中图分类号:

TP228

伍贻威, 龚航, 朱祥维, 刘文祥, 欧钢. 原子钟两级驾驭算法及在建立GNSS时间基准中的应用[J]. 电子学报, 2016, 44(7): 1742-1750.

WU Yi-wei, GONG Hang, ZHU Xiang-wei, LIU Wen-xiang, OU Gang. Twice Atomic Clock Steering Algorithm and Its Application in Forming a GNSS Time Reference[J]. Acta Electronica Sinica, 2016, 44(7): 1742-1750.

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原子钟两级驾驭算法及在建立GNSS时间基准中的应用

Twice Atomic Clock Steering Algorithm and Its Application in Forming a GNSS Time Reference

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