A redundant subspace weighting procedure for clock ensemble  

作　　者：徐海 陈煜 刘默驰 王玉琢 Hai Xu;Yu Chen;Mo-Chi Liu;Yu-Zhuo Wang(National Institute of Metrology,Beijing 100029,China;Key Laboratory of State Administration for Market Regulation,Beijing 100029,China;China National Intellectual Property Administration,Beijing 100088,China)

机构地区：[1]National Institute of Metrology,Beijing 100029,China [2]Key Laboratory of State Administration for Market Regulation,Beijing 100029,China [3]China National Intellectual Property Administration,Beijing 100088,China

出　　处：《Chinese Physics B》2024年第4期435-442,共8页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China (Grant No.2021YFB3900701);the Science and Technology Plan Project of the State Administration for Market Regulation of China (Grant No.2023MK178);the National Natural Science Foundation of China (Grant No.42227802)。

摘　　要：A redundant-subspace-weighting(RSW)-based approach is proposed to enhance the frequency stability on a time scale of a clock ensemble.In this method,multiple overlapping subspaces are constructed in the clock ensemble,and the weight of each clock in this ensemble is defined by using the spatial covariance matrix.The superimposition average of covariances in different subspaces reduces the correlations between clocks in the same laboratory to some extent.After optimizing the parameters of this weighting procedure,the frequency stabilities of virtual clock ensembles are significantly improved in most cases.

关 键 词：weighting method redundant subspace clock ensemble time scale 

分 类 号：TH714[机械工程—测试计量技术及仪器]