Title :
Design of IIR group delay equalisers
Author :
Lo Presti, Letizia ; Visintin, Monica
Author_Institution :
Dipartimento di Elettronica, Politecnico di Torino, Italy
Abstract :
The authors describe a method for equalising group delay distortion through a cascade of second-order IIR allpass filters. The filter design is performed using the gradient algorithm, to get the set of poles that minimise the integral of the squared difference between the desired group delay and the group delay of the filter.
Keywords :
all-pass filters; cascade networks; delay circuits; digital filters; equalisers; filtering and prediction theory; network synthesis; poles and zeros; IIR group delay equalisers; cascade; digital filters; filter design; gradient algorithm; poles; second-order IIR allpass filters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900135
