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

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Redundancy
Mirrors

Keywords

  • Filterbank
  • Lattice structure
  • Pairwise mirror image
  • Paraunitary

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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AB - 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.

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