Title :
Group delay approximation of allpass digital filters by transforming the desired response
Author :
Matsunaga, Tatsuya ; Ikehara, Masaaki
Author_Institution :
Dept. of EEE, Keio Univ., Yokohama, Japan
Abstract :
In this paper, we present a new design method of allpass digital filters with equiripple group delay response. This method is based on solving a least squares solution iteratively. At each iteration, the desired group delay response is transformed so as to have equiripple error. By this method, an equiripple solution is obtained very quickly with less computational complexity.
Keywords :
all-pass filters; delay estimation; digital filters; equiripple filters; iterative methods; least squares approximations; allpass digital filters; computational complexity; equiripple error; group delay approximation; group delay response; iteration; least squares solution; Chebyshev approximation; Computational complexity; Delay; Design methodology; Digital filters; Equalizers; Least squares approximation; Least squares methods; Polynomials; Signal design;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354087
