Constructing pairs of dual bandlimited framelets with desired time localization

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    Abstract

    For sufficiently small translation parameters, we prove that any bandlimited function ψ, for which the dilations of its Fourier transform form a partition of unity, generates a wavelet frame with a dual frame also having the wavelet structure. This dual frame is generated by a finite linear combination of dilations of ψ with explicitly given coefficients. The result allows a simple construction procedure for pairs of dual wavelet frames whose generators have compact support in the Fourier domain and desired time localization. The construction is based on characteriszing equations for dual wavelet frames and relies on a technical condition. We exhibit a general class of function satisfying this condition; in particular, we construct piecewise polynomial functions satisfying the condition.
    Original languageEnglish
    JournalAdvances in Computational Mathematics
    Volume30
    Issue number3
    Pages (from-to)231-247
    ISSN1019-7168
    DOIs
    Publication statusPublished - 2009

    Keywords

    • non-tight frames
    • dual frames
    • wavelet
    • framelets

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