From cardinal spline wavelet bases to highly coherent dictionaries

Andrle, Miroslav and Rebollo-neira, Laura (2008). From cardinal spline wavelet bases to highly coherent dictionaries. Journal of Physics A: Mathematical and Theoretical, 41 (17),

Abstract

Wavelet families arise by scaling and translations of a prototype function, called the mother wavelet. The construction of wavelet bases for cardinal spline spaces is generally carried out within the multi-resolution analysis scheme. Thus, the usual way of increasing the dimension of the multi-resolution subspaces is by augmenting the scaling factor. We show here that, when working on a compact interval, the identical effect can be achieved without changing the wavelet scale but reducing the translation parameter. By such a procedure we generate a redundant frame, called a dictionary, spanning the same spaces as a wavelet basis but with wavelets of broader support. We characterize the correlation of the dictionary elements by measuring their 'coherence' and produce examples illustrating the relevance of highly coherent dictionaries to problems of sparse signal representation.

Publication DOI: https://doi.org/10.1088/1751-8113/41/17/172001
Divisions: Engineering & Applied Sciences > Mathematics
Engineering & Applied Sciences > Systems analytics research institute (SARI)
Additional Information: ©2008 IOP Publishing Ltd. After the Embargo Period, the full text of the Accepted Manuscript may be made available on the non-commercial repository for anyone with an internet connection to read and download. After the Embargo Period a CC BY-NC-ND 3.0 licence applies to the Accepted Manuscript, in which case it may then only be posted under that CC BY-NC-ND licence provided that all the terms of the licence are adhered to, and any copyright notice and any cover sheet applied by IOP is not deleted or modified.
Uncontrolled Keywords: wavelet families,prototype function,mother wavelet,cardinal spline spaces,multi-resolution analysis scheme,Mathematical Physics,Modelling and Simulation,Statistics and Probability,Physics and Astronomy(all),Statistical and Nonlinear Physics
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://iopscien ... 1/41/17/172001/ (Publisher URL)
Published Date: 2008-05-02
Authors: Andrle, Miroslav
Rebollo-neira, Laura ( 0000-0002-7420-8977)

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