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On the stability preserving property of the double bilinear transformation on a class of 2-D transfer functions

  • Sandra A. Yost
  • Peter H. Bauer
  • Kasyapa Balemarthy
Article
  • 25 Downloads

Abstract

This paper addresses the BIBO (bounded-input bounded-output) stability of a class of discrete 2-D quarter-plane filters in the presence of nonessential singularities of the second kind (NSSK's) on the unit bidisk. Conditions under which the double bilinear transformation (DBT) preserves stability are derived. The results presented here also extend the class of systems whose stability can be predicted. Use of the inverse DBT to produce a continuous equivalent of the discrete 2-D transfer function allows easy application of a continuous-domain equivalent of a criterion developed by Dautov. The necessary and sufficient condition for stability derived in this work provides a simple check for the class of systems under consideration. From this class of systems, it is also possible to construct stable pairs of mutually inverse transfer functions.

Keywords

BIBO stability discrete two-dimensional systems NSSK's double bilinear transformation 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Sandra A. Yost
    • 1
  • Peter H. Bauer
    • 1
  • Kasyapa Balemarthy
    • 2
  1. 1.Laboratory for Image and Signal Processing, Department of Electrical EngineeringUniversity of Notre DameNotre Dame
  2. 2.School of Electrical and Computer EngineeringGeorgia Institute of TechnologyAtlanta

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