Adaptive IIR filtering of delta-sigma modulated signals

  • Authors:

  • Anees S. Munshi;David A. Johns

  • Affiliations:

  • University of Toronto, Department of Electrical Engineering, Toronto, ON, Canada;University of Toronto, Department of Electrical Engineering, Toronto, ON, Canada

  • Venue:
  • ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: digital speech processing - Volume III
  • Year:
  • 1993

Quantified Score

Hi-index 0.00

Visualization

Abstract

In this paper we present an alternative method for constructing adaptive recursive digital filters. The proposed filters operate at the oversampled rate directly on the bitstream produced by Delta-Sigma (ΔΣ) analog-to-digital converters. Thus, these filters obviate the need for the decimation and interpolation circuitry required by Nyquist-rate filters. In addition, these adaptive filters -- based on a variant of the familiar LMS algorithm -- utilize only simple hardware components such as adders and registers, making the scheme hardware-efficient and a viable alternative to conventional, Nyquist-rate LMS adaptive filters.