A Subband Adaptive Iterative Shrinkage/Thresholding Algorithm


Bayram I. , SELESNICK I. W.

IEEE TRANSACTIONS ON SIGNAL PROCESSING, vol.58, no.3, pp.1131-1143, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 3
  • Publication Date: 2010
  • Doi Number: 10.1109/tsp.2009.2036064
  • Title of Journal : IEEE TRANSACTIONS ON SIGNAL PROCESSING
  • Page Numbers: pp.1131-1143

Abstract

We investigate a subband adaptive version of the popular iterative shrinkage/thresholding algorithm that takes different update steps and thresholds for each subband. In particular, we provide a condition that ensures convergence and discuss why making the algorithm subband adaptive accelerates the convergence. We also give an algorithm to select appropriate update steps and thresholds for when the distortion operator is linear and time invariant. The results in this paper may be regarded as extensions of the recent work by Vonesch and Unser.