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

作　　者：许朝阳[1] 刘俊民[1] 范延芳[1] 邱宏茂[1] 

机构地区：[1]禁核试北京国家数据中心,北京100085

出　　处：《核电子学与探测技术》2008年第6期1140-1143,1176,共5页Nuclear Electronics & Detection Technology

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 frequency. It can open out one signal＇s frequency components and their evolvements. It is the new evolvement 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 

分 类 号：TN911.6[电子电信—通信与信息系统]