Alias reduction: Generalised pseudocirculant conditions

  • Dhuli R
  • Lall B
  • 3


    Mendeley users who have this article in their library.
  • 1


    Citations of this article.


Complete alias cancellation, in an arbitrary nonuniform and/or nonmaximally decimated filter bank structure, is not guaranteed. Also it is well known that the inversion of a linear periodically time varying (LPTV) system is not always guaranteed. In this paper we exploit the ability of uniform filter bank (UFB) framework to provide alternative models for these structures. We propose a simplification by generalising the well known pseudocirculant conditions [1] (Vaidyanathan and Mitra, 1988). UFB can be characterised by the two switching representations of the LPTV systems. The set of linear time invariant (LTI) systems in each representation is uniquely related to the rows and columns of the matrix associated with the UFB. Under the pseudocirculant conditions the UFB reduces to an LTI system. Here we obtain a set of generalised pseudocirculant conditions which reduce the UFB to an LPTV of lower order. ?? 2009 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Alias cancellation
  • Filter banks
  • LPTV systems

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Ravindra Dhuli

  • Brejesh Lall

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free