时频分析技术在地震信号滤波中的应用
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摘要
时频分析旨在构造一种时间和频率的联合密度函数,继而揭示信号所含频率分量及其演化特性,是传统Fourier分析的新进展乃至于革命。本文针对地震信号的非平稳特性,研究了基于短时Fourier变换的时变滤波方法,并给出了实验结果和结论。
Joint time-frequency analysis is conducted to construct one joint density function of time and fie- quency.It can open out one signal's frequency components and their evolvements.It is the new evolve- ment of Fourier analysis.In this paper,according to the characteristic of seismic signal,one time-variant filtering method based on short-time Fourier transform is introduced,and the results of experiment and conclusion are presented.
Joint time-frequency analysis is conducted to construct one joint density function of time and fie- quency.It can open out one signal's frequency components and their evolvements.It is the new evolve- ment of Fourier analysis.In this paper,according to the characteristic of seismic signal,one time-variant filtering method based on short-time Fourier transform is introduced,and the results of experiment and conclusion are presented.
引文
[1]Qian S,Chen D.Joint Time-Frequency Analysis [M].New York Prentice Hall,1996.
[2]陈汝钧．红外探测系统三重相关峰值检测技术研究[J]．红外与毫米波学报，1998，17(4)：277-282．
[3]张贤达．保铮．非平稳信号分析与处理[M]．国防工业出版社，1998．9．
[2]陈汝钧．红外探测系统三重相关峰值检测技术研究[J]．红外与毫米波学报，1998，17(4)：277-282．
[3]张贤达．保铮．非平稳信号分析与处理[M]．国防工业出版社，1998．9．
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