Title :
Design of IIR digital allpass filters using least pth phase error criterion
Author :
Tseng, Chien-Cheng
Author_Institution :
Dept. of Comput. & Commun. Eng., Nat. Kaohsiung First Univ. of Sci. & Technol., Taiwan
Abstract :
In this paper, the problem of designing a digital IIR allpass filter to have an arbitrarily prescribed phase response is considered. The filter coefficients are determined by using least pth phase error criterion. An iterative reweighted least squares method is used to obtain the optimal filter coefficients by solving a set of linear simultaneous equations in each iteration. Design examples of Hilbert transformer and fractional delay filter are demonstrated to illustrate the effectiveness of the new design method.
Keywords :
IIR filters; all-pass filters; delay filters; digital filters; least squares approximations; Hilbert transformer; IIR digital allpass filters; filter coefficients; fractional delay filter; iterative reweighted least squares method; least pth phase error criterion; linear simultaneous equation; phase response; Computer errors; Design methodology; Digital filters; Equations; Finite impulse response filter; IIR filters; Least squares methods; Minimax techniques; Nonlinear filters; Signal design;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205810
