节点文献
时频分析技术在地震信号滤波中的应用
Application on technique of joint time-frequency analysis of seismic signal filtering
【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。
【Abstract】 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.
【关键词】 短时Fourier变换;
联合时频分析;
三重相关;
时变滤波;
【Key words】 short-time Fourier transform; joint time-frequency analysis; triple correlation; time-variant filtering; seismic signal;
【Key words】 short-time Fourier transform; joint time-frequency analysis; triple correlation; time-variant filtering; seismic signal;
- 【文献出处】 核电子学与探测技术 ,Nuclear Electronics & Detection Technology , 编辑部邮箱 ,2008年06期
- 【分类号】TN911.6
- 【被引频次】2
- 【下载频次】189