煤田地质与勘探Issue(1)：72-77,6.DOI:10.3969/j.issn.1001-1986.2013.01.015
几种重排算法在地震信号处理中的实验分析
Experiments and analysis in seismic data processing with several kinds of reassignment methods
周竹生 1陈高祥1
作者信息
- 1. 中南大学地球科学与信息物理学院，湖南 长沙 410083
- 折叠
摘要
Abstract
The main idea of reassignment method in time-frequency analysis is presented and some expressions used to compute the accurate location of the local energy gravity center are given;then two numerical experiments are presented to show how these reassignment methods work individually as used to process single-trace seismic data. Based on the experiments, some conclusions are drawn that the reassignment methods can not only effectively reduce cross-terms, but also lead to a good time-frequency concentration. Compared with others, the reassignment spectrogram has the best potential for ideal time-frequency concentration, especially when the dominant frequen-cies are required to be underlined. The reassignment smoothing pseudo Wigner-Ville distribution can also achieve perfect effects though it is a little worse than the former one. The pseudo Margenau-Hill distribution is the worst of the three, since it fails to relocate the dispersive energy to the calculated center. A pretty precise instantaneous fre-quency section can be produced when the reassignment method is applied to deal with seismic signals.关键词
时频分析/重排算法/地震信号处理/非平稳信号/双线性Key words
time-frequency analysis/reassignment method/seismic data processing/nonstationary signal/bilinearity分类
天文与地球科学引用本文复制引用
周竹生,陈高祥..几种重排算法在地震信号处理中的实验分析[J].煤田地质与勘探,2013,(1):72-77,6.
