摘要
在提高信噪比时通常根据信号和噪音的差异选取不同的滤波方法。由于地震记录的复杂性,有时有效波与干扰波在视速度或频率上没有明显差异,为此本文提出一种利用S变换时频滤波的方法,并比较了该方法相对其它滤波方法在时频滤波方面的优势。
In usual different filter methods are selected according to the differences between effective signal and noise for increasing the signal-noise ratio. But for complication of seismic data, sometime the effective signal and noise have no clear difference in apparent velocity and frequency. For this problem a method using S transform to fulfill the time-frequency filtering is presented in this paper, and the advantage of S transform in time-frequency filtering is compared with other filter methods through example.
出处
《西北地震学报》
CSCD
北大核心
2007年第3期224-229,共6页
Northwestern Seismological Journal
关键词
S变换
时频滤波
短时傅立叶变换
F—K滤波
S transform
Time-frequency filtering
Short-time Fourier transform
F-K filtering
