Math @ Duke

Publications [#287129] of Ingrid Daubechies
Papers Published
 Daubechies, I, Wavelet transform, timefrequency localization and signal analysis, vol. 25 n 13
(1988),
pp. 42
(last updated on 2017/12/14)
Abstract: Summary form only given, as follows. Two different procedures are studied by which a frequency analysis of a timedependent signal can be effected, locally in time. The first procedure is the shorttime or windowed Fourier transform; the second is the wavelet transform, in which highfrequency components are studied with sharper time resolution than lowfrequency components. The similarities and the differences between these two methods are discussed. For both schemes a detailed study is made of the reconstruction method and its stability, as a function of the chosen timefrequency density. Finally the notion of timefrequency localization is made precise, within this framework, by two localization theorems.


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