基于S变换的工频干扰压制

英文篇名：THE ATTENUATION OF POWER INTERFERENCE BASED ON S-TRANSFORM
中文刊名：物探与化探
英文刊名：Geophysical and Geochemical Exploration
作者：汪铁望 ; 于相海 ; 刘明乾 ; 胡浩 ; 周夏丽
英文作者：WANG Tie-wang ; YU Xiang-hai ; LIU Ming-qian ; HU Hao ; ZHOU Xia-li (Changqing Branch of Academy ; BGP INC. ; Xi'an 710021 ; China)
中文关键词：工业干扰 ; S变换 ; 时频分析
英文关键词：power interference ; S-transform ; time-frequency analysis
出版日期：2010-08-15
机构：东方地球物理公司研究院长庆分院;
年：2010
期：04
出版单位：物探与化探

摘要

S变换能够提供每一个频率成分的瞬时幅值和瞬时相位的特点,笔者提出在时频域得到工业干扰的幅值和相位,然后用地震记录减去工业干扰,即可达到压制工业干扰的目的。合成地震记录和实际地震数据处理表明,此方法都能取得较好的效果,并且无论是固定幅值和相位的工业干扰,还是幅值和相位随时间变化的工业干扰,此方法都适用。
To tackle power interference in seismic record,the authors use S transform which can provide each frequency with the instantaneous amplitude and instantaneous phase so as to obtain the power interference amplitude and phase by using S transform in the time-frequency domain and get the power interference.In this way,the power interference can be reduced.Synthetic seismogram and actual seismic data processing show that this method can achieve good results,no matter whether the interference is a fixed amplitude and phase of power interference or a time-varying amplitude and phase of power interference.

引文

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