• DocumentCode
    1760383
  • Title

    Polyphase Decomposition of Digital Fractional-Delay Filters

  • Author

    Johansson, Hakan ; Harris, Fred

  • Author_Institution
    Dept. of Electr. Eng., Linkoping Univ., Linkoping, Sweden
  • Volume
    22
  • Issue
    8
  • fYear
    2015
  • fDate
    Aug. 2015
  • Firstpage
    1021
  • Lastpage
    1025
  • Abstract
    This letter shows that, for arbitrary M-fold polyphase decompositions, the polyphase components of digital fractional-delay (FD) filters correspond to FD filters as well, but with different delays and gains. For even values of M, the components also have additional and different phase offsets. The letter also discusses the application of these results to the optimization of high-order filters with few unknowns.
  • Keywords
    delay filters; delays; digital filters; optimisation; arbitrary M-fold polyphase decompositions; digital fractional delay filters; high order filters; phase offsets; Approximation methods; Delays; Finite impulse response filters; Frequency response; Information filters; Optimization; FIR filters; fractional-delay filters; high-order filters; polyphase decomposition;
  • fLanguage
    English
  • Journal_Title
    Signal Processing Letters, IEEE
  • Publisher
    ieee
  • ISSN
    1070-9908
  • Type

    jour

  • DOI
    10.1109/LSP.2014.2381603
  • Filename
    6987280
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1760383