物探与化探2011，Vol.35Issue(4)：546-552,7.
非平稳地震信号匹配追踪时频分析
MATCHING PURSUIT TIME-FREQUENCY ANALYSIS OF NON-STATIONARY SEISMIC SIGNALS
摘要
Abstract
In this paper, the authors made Ricker wavelet-based adaptive matching pursuit decomposition of seismic signals and discussed the method of time-frequency representation by matching wavelets. Since the time-frequency information of matching wavelet's Wigner-Ville distribution is limited, this paper proposes a time-frequency representation based on adjustable window Short Time Fourier Transform. Furthermore, by using the complex spectrum of matching wavelets, this paper introduces a new time-frequency representation , which not only has the same resolution and energy concentration properties as Wigner-Ville method, but also retains the most basic time-frequency characteristics of the original signal without cross term and window truncation effects. Compared with time-frequency characteristics of Short Time Fourier transform and S-transform, the matching pursuit time-frequency representation and instantaneous spectral parameters have higher resolution. Real data application also shows that the matching pursuit time-frequency analysis is very suitable for seismic signal with non-stationary characteristics.关键词
匹配追踪/时频分析/匹配子波/非平稳信号Key words
matching pursuit/ time-frequency analysis/ matching wavelet/ non-stationary signal分类
天文与地球科学引用本文复制引用
张繁昌,李传辉..非平稳地震信号匹配追踪时频分析[J].物探与化探,2011,35(4):546-552,7.基金项目
国家863(2006AA09A102)资助项目 （2006AA09A102）
