Multirate filterbank design: a relaxed commutant lifting approach

  • Authors:
  • Dzung Du;Wisuwat Bhosri;Arthur E. Frazho

  • Affiliations:
  • School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN;School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN;School of Aeronautics and Astronautics, Purdue University, West Lafayette, IN

  • Venue:
  • IEEE Transactions on Signal Processing
  • Year:
  • 2010

Quantified Score

Hi-index 35.68

Visualization

Abstract

In this paper, we reformulate the design of the IIR synthesis filters in classical multirate systems as an interpolation problem involving a norm called the Pm norm where m is any positive integer. This interpolation problem can be solved using relaxed commutant lifting techniques in operator theory. The Pm norm is actually a tradeoff in handling energy distortion and error peak distortion. Our development allows the designer to select from a family of filters the one which is best suited for a specific application. The well-known H2 and H∞ design methods can be viewed as special cases when m = 1 and m→ ∞ respectively. The computation relies mainly on FFT techniques and a finite section of certain Toeplitz matrices. The resulting filters are given in state space form and maybe useful for practical implementation.