固体潮时频分析新方法
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摘要
对传统时频分析方法的特点和局限性作了介绍。采用Huang-H ilbert Transform ation方法分析了固体潮数据,即利用经验模态分解,将复杂信号分解成有限个本征模态函数之和,求取三维时频空间的H ilbert谱。仿真实验和重力固体潮实例分析表明,该方法适用于调频调幅信号特征的提取。
On the basis of analyzing the feature and limits of the conventional time-frequency analysis methods,we use Huang-Hilbert Transformation(HHT) to analyze solid tide data,i.e.,use empirical mode decomposition to decompose complicated signal into the sum of finite intrinsic mode functions,and construct a 3D energy-frequency-time Hibert spectra of the data.The emulational signals and the gravity tide signal are analyzed using the HHT method,which turns out that the method is suited for the analysis of AM-FM signal.
引文
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