国防科技大学学报2017，Vol.39Issue(5)：26-31,6.DOI:10.11887/j.cn.201705005
Huber加权的频率稳定度非相关差分抗差估计方法
Uncorrelated differential robust estimation of frequency stability based on Huber weight function
摘要
Abstract
The atomic clock's frequency stability estimated by Allan variance will significantly deviate from its true value if anomalies occur.An uncorrelated differential robust estimation method based on Huber weight function was proposed.Firstly,a difference estimation model of Allan variance was established,and the computation complexity of noise identification and whitening introduced by correlated difference was analyzed on the basis of the statistical property of the clock difference sequence.In order to solve this problem,a construction model of uncorrelated difference sequence was established to avoid complex noise identification and whitening computation effectively.Based on this,the uncorrelated difference robust estimation method of Allan variance was derived,followed by a counteracted technique of error accumulation introduced by robust estimation.Finally,the integrated robust estimation solution was given,and its effectiveness was verified by experiment.The results show that the method has significance robustness for phase outliers and phase jumps,and the relative deviation introduced by anomalies can be reduced from almost 200％ to less than 10％.关键词
频率稳定度/Allan方差/抗差估计/非相关差分/Huber权函数Key words
frequency stability/Allan variance/robust estimation/uncorrelated difference/Huber weight function分类
信息技术与安全科学引用本文复制引用
龚航,朱祥维,刘增军,李井源,孙广富..Huber加权的频率稳定度非相关差分抗差估计方法[J].国防科技大学学报,2017,39(5):26-31,6.基金项目
国防科技项目基金资助项目(3101121) （3101121）
国家自然科学基金资助项目(61403413) （61403413）
