摘要
广义S变换继承和发展了S变换的优点,其引入了λ、p两个参数,对S变换中固定的基本小波进行了推广和扩展,使得其时窗更灵活多变,在一定程度上提高了非平稳信号分析处理的时频分辨率。通过线性调频信号模拟测试对比,证实了广义S变换的信号聚焦能力明显优于S变换,能够更好地刻画信号的局部特性。最后,以某区二维单炮地震数据为例进行了地震信号的广义S变换时频分析,取得了良好效果。
In this paper, the generalized S transform（GST） is inherited and developed by taking the advantages of S transform （ST）. Since it is expanded the fixed basic wavelet of ST by introducing 2 and p two parameters, the time window of GST is more flexible, and the time-frequency resolution of non-stationary signal is improved greatly. Through the simulation test of the linear frequency signal, it is proved that the focusing properties of GST is better than that ST, and the local feature of GST is depicted more clearly. Finally, the time-frequency analysis of GST is used to analyze the 2D single shot seismic data, and a good result is achieved.
作者
魏学强
袁洪克
秦晶晶
左莹
Wei Xueqiang Yuan Hongke Qin Jingjing Zuo Ying(Geophysical Exploration Center, China Earthquake Administration, Zhengzhou 450002, Chin)
出处
《震灾防御技术》
CSCD
北大核心
2016年第4期808-813,共6页
Technology for Earthquake Disaster Prevention
基金
中国地震局地球物理勘探中心青年基金资助(YFGEC2014003)
关键词
地震信号
广义S变换
时频分析
Seismic signal
Generalized S transform
Time-frequency analysis
