原子钟噪声的高阶谱分析

娄抗震 柯熙政

西安理工大学自动化与信息工程学院,西安710048

摘　要:处理随机信号通常使用现代谱估计方法，但是这种方法一般只能处理平稳的高斯信号，使用高阶谱分析可以克服这些缺陷。利用现代谱估计法和高阶谱法分别估计原子钟数据的功率谱，并对功率谱进行拟合，可分析原子钟的噪声特性。理论分析及实验结果表明，高阶谱分析能有效处理实际信号中的非平稳非高斯问题。[著者文摘]

关键词:原子钟 随机信号 频谱 功率谱 噪声特性

The Higher-Order Spectral Analysis of Atom Clock NoiseLOU Kang-Zhen, KE Xi-ZhengInstitute of Automation ＆ Information Engineering, Xi＇an University of Technology, Xi＇an 710048Abstract:Modern spectral estimate is generally used to process the random signal. But only stationary Gaussian signal can be processed by this method. Using the higher order spectral analysis can overcome these defects. The modern spectral estimate and higher order spectral analysis are utilized to estimate the spectrum of the atom clock data respectively, and the noise characteristic is analysed by fitting to the spectrum of the atom clock. Theory analysis and experimental result indicate that the higher order spectral analysis can deal effectively with nonstationary and non-Gaussian problems in the actual signal.[著者文摘]

Key words:Atomic clock Random signal Frequency spectrum Power spectrum Noise characteristic