论文部分内容阅读
地震波的频率参数是地震波重要的动力学特征.用希尔伯特变换的方法可以求出地震信号的瞬时频率.但是,希尔伯特变换滤波因子是衰减较慢的无穷序列,这给求取仅持续两三个相位的地震于波的瞬时频率带来困难.本文提出用斜率鉴频的办法求取瞬时频率,给出具有最短滤波因子的鉴频滤波器设计,最后将理论试算的结果和希尔伯特变换算法的结果加以比较.
The frequency parameters of seismic waves are the important dynamic characteristics of seismic waves. The Hilbert transform method can be used to find the instantaneous frequency of seismic signals. However, the Hilbert transform filter factor is a slowly decaying infinite sequence, It is difficult to find the instantaneous frequency of the wave in the earthquakes lasting only two or three phases.In this paper, we propose to calculate the instantaneous frequency by the method of slope frequency discrimination and give the design of the frequency-discriminating filter with the shortest filtering factor. Finally, The results of the Albert transformation algorithm are compared.