摘要
以实测大地电磁信号为分析对象,对比研究了小波分析和Hilbert-Huang变换在大地电磁(magnetotelluric,MT)信号分解和时频分析上面的特点.给出了小波分析和Hilbert-Huang变换的数学原理,分析了2种方法在MT信号分解中的分解方法及其物理意义,讨论了2种方法在MT信号时频谱表征能力上的异同,为大地电磁信号分析方法的选择提供用了有价值的参考.
Measured magnetotelluric signal is taken as the analysis object,and comparative study of wavelet analysis and Hilbert-Huang transform is applied in magnetotelluric(MT) signal procession from signal decomposition to time-frequency analysis.The mathematical theory of Wavelet analysis and Hilbert-Huang transform are expressed.The decomposition method of two ways and their physical significance for MT signal are analyzed,and the similarities and differences to characterize the spectrum of MT signal are discussed between the two methods.These provide a valuable reference foe the choice of analysis method of magnetotelluric signal procession.
出处
《湖南文理学院学报(自然科学版)》
CAS
2014年第2期29-34,共6页
Journal of Hunan University of Arts and Science(Science and Technology)
基金
国家自然科学基金项目(41304098)
湖南省自然科学基金项目(12JJ4034)
湖南省教育厅青年项目(13B076)
湖南文理学院重点学科建设项目资助-无线电物理
湖南省重点实验室"光电信息集成与光学制造技术"
"湖南省光电信息技术校企联合人才培养基地"
常德市科技局博士创新创业项目(2013BS01)
常德市科技局项目(2011JC02)