On the Subband Orthogonality of Cosine-Modulated Filter Banks

Kong A. Lee, Woon S. Gan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)

Abstract

In this brief, the second-order characteristics of co-sine-modulated filter banks are formulated and analyzed. We show that, for any type of input spectrum, adjacent subband signals of a cosine-modulated filter bank are properly phase-aligned in such a way that they are nearly orthogonal at zero lag even though they are not mutually exclusive. The orthogonal properties are desirable in reducing the computational complexity of subband processing systems.

Original languageEnglish
Pages (from-to)677-681
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume53
Issue number8
DOIs
Publication statusPublished - Aug 2006
Externally publishedYes

Keywords

  • Cosine-modulated filter banks
  • orthogonal
  • subband processing

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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