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    Design of Variable Fractional Delay Filter with Fractional Delay Constraints

    Access Status
    Fulltext not available
    Authors
    Dam, Hai Huyen Heidi
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Dam, H.H.H. 2014. Design of Variable Fractional Delay Filter with Fractional Delay Constraints. IEEE Signal Processing Letters. 21 (11): pp. 1361-1364.
    Source Title
    IEEE Signal Processing Letters
    DOI
    10.1109/LSP.2014.2336662
    ISSN
    1070-9908
    School
    Department of Mathematics and Statistics
    URI
    http://hdl.handle.net/20.500.11937/28928
    Collection
    • Curtin Research Publications
    Abstract

    This letter develops an efficient computational procedure for the design of an odd-order variable fractional delay (VFD) digital filter with minimum peak variable fractional delay error subject to restrictions on the peak variable frequency response error. An iterative algorithm is developed to solve the formulated non-linear optimization problem where a first order linear approximation is employed for the variable fractional delay error. This results in a second-order cone programming (SOCP) problem with linear constraints. Design examples show that the peak fractional delay error can be reduced significantly from the minimax solution while maintaining approximately the same peak frequency response error. In addition, for a fixed level of peak variable frequency response error, approximately 1.61-2.09 dB improvement for the peak variable delay error can be obtained over existing methods.

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