【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。更多还原

【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.更多还原