原子钟的闪变噪声及其小波分析

闪变噪声是无线电元件参量无规则变化引起的具有１／ｆ谱密度分布的噪声。这种噪声究竟是一种基本噪声还是一种数学表象，目前尚无定论。本文根据小波分析的基本原理，从信号的正交分解出发，初步从噪声信号中分离出产生闪变噪声的二分之一阶白噪声。这种噪声分离方法经过陕西天文台国家授时中心实测数据的检验，而且与论述同一问题的其它文献中的方法有所不同，比较简单而切实可行。

On Flicker Noise in an Atomic Clock and Its Wavelet Analysis

Flicker noise, which is of l/f type of spectrum, is caused by the irregular variation of the porameters of efortronic elements- It is not clear whether nicker noise is a kind of fundamental nOise or merely a mathematical idea. According to the wave1et theory, the 1/2th white noise which is the source of nicker noise is separated from the noise in an atomic clock. The methed is tested by us-ing the real data obtained in National Time Center. oUr method is different from those described in the papers avai1able on the same problem, which is simple and practicable. Flicker noise has been put forward mere1y for mathematical symmetry and completeness.