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