原子鐘噪聲的高階譜分析

婁抗震 柯熙政

西安理工大學自動化與信息工程學院,西安710048

摘　要:處理隨機信號通常使用現代譜估計方法，但是這種方法一般只能處理平穩的高斯信號，使用高階譜分析可以克服這些缺陷。利用現代譜估計法和高階譜法分別估計原子鐘數據的功率譜，并對功率譜進行擬合，可分析原子鐘的噪聲特性。理論分析及實驗結果表明，高階譜分析能有效處理實際信號中的非平穩非高斯問題。[著者文摘]

關鍵詞:原子鐘 隨機信號 頻譜 功率譜 噪聲特性

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