摘要
介绍了瞬时频率的概念和瞬态谱的小波包计算方法 ,并结合时间域模拟信号给出了其时频分布 .结果表明 ,小波包变换可准确描述地震信号的时变特征 ,值得推广应用 .
The conception of transient frequency and calculation method of wavelet packet are introduced,and time frequency distribution about simulation and actual seismic signals is given.The results indicates that wavelet packet transform may be used to describe the characteristics of seismic signals at any moment and is worth applying to processing seismic signals.
出处
《西北地震学报》
CSCD
2000年第2期143-146,176,共5页
Northwestern Seismological Journal
基金
国家自然科学基金重点项目!(49734 15 0 )
地震科学联合基金资助项目!(1980 6 1)
关键词
地震数据
小波包变换
瞬时频率
时频分布
Seismic data
Wavelet packet transform
Transient frequency
Time frequency distribution
