Title :
Group delay approximation of allpass digital filters by transforming the desired response
Author :
Matsunaga, Tatsuya ; Ikehara, Masaaki
Author_Institution :
Dept. of Electron. & Electr. Eng., 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; signal processing; allpass digital filters; computational complexity; design method; digital signal processing; equiripple error; equiripple group delay response; group delay approximation; 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 :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1201701
