Title :
Wavelet-packet basis selection for abrupt changes detection in multicomponent signals
Author :
Hitti, Eric ; Lucas, Marie-Francoise
Author_Institution :
Ecole Centrale de Nantes, Univ. de Nantes, Nantes, France
Abstract :
We propose a "best basis" selection method, to detect abrupt changes in noisy multicomponent signals. The basis, selected from a wavelet-packet library with an energetic criterion, separates the different frequency components of the signal while keeping the best possible time localization. From the obtained basis, we reconstruct monocomponent signals in each band. The detector is based on the adequation of this set of signals with an abrupt change model. A performance analysis is realized from synthetic signals, in terms of selected basis and detection results.
Keywords :
discrete wavelet transforms; signal detection; signal reconstruction; signal synthesis; discrete wavelet transform; monocomponent signals reconstruction; multicomponent signal abrupt change detection; synthetic signal; time localization; wavelet packet best basis selection method; Bandwidth; Discrete wavelet transforms; Filter banks; Signal resolution; Time-frequency analysis; Wavelet packets;
Conference_Titel :
Signal Processing Conference (EUSIPCO 1998), 9th European
Conference_Location :
Rhodes
Print_ISBN :
978-960-7620-06-4