摘要
S变换(ST)被广泛应用于时频分析,但受海森堡不确定性原理制约,其分辨率有限。同步挤压S变换(SSST)是一种正反无损可逆变换,通过对S变换时频谱在频率方向上进行挤压,使能量聚集到信号的真实瞬时频率上,显著地压制了虚假频率成分、提高了信号的时频谱的分辨率。将SSST方法应用于合成信号和实际地震资料处理,所得结果表明SSST比ST具有明显的提高地震信号时频分辨率的能力,有利于薄层识别和储层描述。
The S transform(ST)is a one of widely used time-frequency analysis methods,but affected by the Heisenberg uncertainty principle,its resolution is limited.A new time-frequency transform called synchro-squeezing S transform(SSST)is proposed in this paper,which effectively eliminates false frequency components and improves the time-frequency resolution by squeezing the result of S transform in the frequency direction,and the inverse transformation of SSST is lossless.Tests on synthetic data and seismic data show that the proposed transform yields time-frequency results with higher resolution than the ST and preserves signal frequency characteristics,which helps thin bed reservoir identification.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2017年第4期689-695,共7页
Oil Geophysical Prospecting
基金
国家自然科学基金项目(41230318
41074077)
高等学校博士学科点专项科研基金课题(20130132110023)联合资助
关键词
同步挤压S变换
时频分析
时频分辨率
薄层
地震资料
synchro-squeezing S transform(SSST)
time-frequency analysis
time-frequency resolution
thin bed
seismic data
