New lattice structure of M-channel paraunitary filterbanks

Yuhiro Kobayashi, Masaaki Ikehara

    Research output: Contribution to journalArticle

    Abstract

    This paper proposes a new lattice structure for the M-channel paraunitary filterbank. When a filterbank is realized by using a lattice structure, there is an advantage that properties such as phase linearity and the paraunitarity can be retained if the coefficients are quantized. A large number of lattice structures have been proposed, but there remains the problem that the proposed structures contain redundancy. This paper first eliminates the redundancy from the lattice structure and presents a new lattice structure for the generalized filterbank without restrictions such as phase linearity. Based on the proposed structure and restricting the parameters, a pairwise mirror image filterbank structure is presented. Finally, the usefulness of the approach is demonstrated by simulation.

    Original languageEnglish
    Pages (from-to)12-19
    Number of pages8
    JournalElectronics and Communications in Japan, Part III: Fundamental Electronic Science (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Volume88
    Issue number6
    DOIs
    Publication statusPublished - 2005 Jun 1

    Keywords

    • Filterbank
    • Lattice structure
    • Pairwise mirror image
    • Paraunitary

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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