Title :
Use of oversampled Sigma - Delta modulator for analogue adaptive FIR filters based on LMS algorithm
Author :
Huang Qiuting ; Moschytz, G.S.
Author_Institution :
Sch. of Inf. Syst., East Anglia Univ., Norwich, UK
fDate :
4/9/1992 12:00:00 AM
Abstract :
An adaptive FIR filter configuration which uses a Sigma - Delta modulator as a front end is proposed for implementing the LMS algorithm in analogue form. The oversampled Sigma - Delta modulator converts the filter input into a binary sequence, which can be readily delayed and multiplied with a shift register and on/off switching. Computer simulations show very good performance for such a hardware efficient configuration.
Keywords :
active filters; adaptive filters; least squares approximations; modulators; switched capacitor filters; LMS algorithm; SC filters; analogue adaptive FIR filters; binary sequence; hardware efficient configuration; oversampled Sigma - Delta modulator; shift register; sigma-delta modulator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920475
