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25 Mb +125 Mb software downloads on line, 1999-06-15

Abstract:

The wavelet transform commands in MIDAS: Introduction + Commands Description TRANSF/WAVE RECONS/WAVE HEADER/WAVE INFO/WAVE EXTRAC/WAVE ENTER/WAVE VISUAL/WAVE VISUAL/CUB VISUAL/CONT VISUAL/SYNT VISUAL/PLAN VISUAL/PERS FILTER/WAVE COMPAR/WAVE PLOT/SNR PLOT/COR DIRECT/WAVE CITTERT/WAVE GRAD/WAVE LUCY/WAVE TUTORIAL/WAVE TRAN1D/WAVE REC1D/WAVE Author's introduction is quoted as follows: "The Fourier transform is a tool widely used for many scientific purposes, but it is well suited only to the study of stationary signals where all frequencies have an infinite coherence time. The Fourier analysis brings only global information which is not sufficient to detect compact patterns. Gabor [13] introduced a local Fourier analysis, taking into account a sliding window, leading to a time frequency-analysis. This method is only applicable to situations where the coherence time is independent of the frequency. This is the case for instance for singing signals which have their coherence time determined by the geometry of the oral cavity. Morlet introduced the Wavelet Transform in order to have a coherence time proportional to the period [26]. " http://npg.dl.ac.uk/MIDAS/download/DataAcqApplications.html http://www.eso.org/sci/data-processing/software/esomidas//doc/user/98NOV/volb/node308.html

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http://www.eso.org/sci/data-processing/software/esomidas//doc/user/98NOV/volb/node308.html

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DataAcqApplications.html

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