Title :
IIR Digital Filter Design with Novel Stability Criterion Based on Argument Principle
Author :
Jiang, Aimin ; Kwan, Hon Keung
Author_Institution :
Dept. of Electr. & Comput. Eng., Windsor Univ., Ont.
Abstract :
A method for designing IIR digital filters with a novel stability criterion based on the argument principle is proposed in this paper. Unlike the stability criteria used in some design algorithms, this stability condition is both sufficient and necessary. In the paper, the weighted least-squares (WLS) design of IIR filters is first formulated as an iterative quadratic programming (QP) problem without any constraint. Then the stability criterion is incorporated in the quadratic form at each iteration. Two examples are presented to illustrate the effectiveness of the proposed approach.
Keywords :
IIR filters; circuit stability; digital filters; iterative methods; least squares approximations; quadratic programming; IIR digital filter; argument principle; iterative quadratic programming; stability criterion; weighted least-squares design; Algorithm design and analysis; Design methodology; Digital filters; Finite impulse response filter; IIR filters; Iterative algorithms; Quadratic programming; Stability criteria; Sufficient conditions; Transfer functions;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378857
