基于动态Allan方差法的时钟噪声非平稳性跟踪  

Tracking Nonstationarity in Atomic Clock Noise Based on Dynamic Allan Variance Approach

作　　者：姚娅川[1] 

机构地区：[1]四川理工学院自动化与电子信息学院,四川自贡643000

出　　处：《科技通报》2016年第8期133-136,共4页Bulletin of Science and Technology

基　　金：2012年四川省教育厅重点项目(12ZA093);四川理工学院重大培养项目(2014PY15);2014酿酒生物技术及应用四川省重点实验室项目(NJ2014-14);2014企业信息化与物联网测控技术四川省高校重点实验室开放项目(2014WYJ05);2014自贡市科技局项目(2014DZ10)

摘　　要：原子钟为整个控制系统提供振动频率基准,其振动频率的平稳性关系到整个系统的精确性,因此分析原子钟频率信号的平稳性具有重要意义;本文首先分析了Allan方差法和动态Allan方差法的原理,然后仿真出了两种信号分别用Allan方差法和动态Allan方差法进行处理,结果表明:动态Allan方差法可以跟踪信号的非平稳性;最后用动态Allan方差法处理了铷原子钟的频率信号,结果表明:其频率信号是非平稳过程,而且信号中还存在频率跳跃。Atomic clock can supply benchmark of vibration frequency for the whole system, and itsstationary concerns the accuracy of the system, so it is great meaning to analyze stationary of clockfrequency. Firstly this essay analyzes the principle of the Allan Variance and the Dynamic AllanVariance, then two kinds of nonstationarity data are simulated and processed by the Allan Variance andthe Dynamic Allan Variance, which shows that the Dynamic Allan Variance can track nonstationarity insignal. At last, frequency signal of Rubidium clock is processed by the Dynamic Allan Variance, theresult of which indicates frequency signal of Rubidium clock is non-stationary and a frequency jumpexists in the signal caused by the insurgence of long term noise.

关 键 词：原子钟 非平稳性 动态Allan方差 频率跳跃 

分 类 号：TN75[电子电信—电路与系统]