中南大学学报（自然科学版）2009，Vol.40Issue(5)：1399-1405,7.
Hilbert-Huang变换与大地电磁信号的时频分析
Hilbert-Huang transform and time-frequency analysis of magnetotelluric signal
摘要
Abstract
Hilbert-Huang transform was proposed as a method of time?frequency analysis in magnetotelluric (MT) signals processing. Firstly, the time-frequency analysis method of Hilbert-Huang transform and conception of transient frequency were introduced, and the empirical mode decomposition and time?frequency distribution of a simulative signal was carried out. Then the actual MT data series were analyzed and processed based on Hilbert-Huang transform (HHT) spectrum. The results show that Hilbert energy spectrum can clearly show the energy distribution with time and frequency in detail and has strong ability to analyze non-stationary signal. In HHT spectrum, time and frequency resolving power is strong and not restricted by Heisenberg principle. Hilbert-Huang transform can be used to precisely describe the nonlinear and non-stationary characteristics of MT signals, and it is an effective tool of time-frequency analysis in MT signals processing.关键词
Hilbert-Huang变换/经验模态分解/大地电磁信号/时频分析Key words
Hilbert-Huang transformation/ empirical mode decomposition/ magnetotelluric signal/ time-frequency analysis分类
天文与地球科学引用本文复制引用
汤井田,蔡剑华,任政勇,化希瑞..Hilbert-Huang变换与大地电磁信号的时频分析[J].中南大学学报（自然科学版）,2009,40(5):1399-1405,7.基金项目
国家高技术研究发展计划("863"计划)项目(2006AA06Z105) （"863"计划）
