电子学报2016，Vol.44Issue(7)：1742-1750,9.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
Twice Ato mic CIock Steering AIgorith m and Its AppIication in Forming a GNSS Ti me Reference
伍贻威 1龚航 1朱祥维 1刘文祥 1欧钢1
作者信息
- 1. 国防科技大学电子科学与工程学院，湖南长沙410073
- 折叠
摘要
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 param-eter 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 stabili-ty 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.关键词
原子钟驾驭/数字锁相环/Kalman滤波器/频率稳定度Key words
atomic clock steering/digital phase locked loop/Kalman filter/frequency stability分类
信息技术与安全科学引用本文复制引用
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):1742-1750,9.
