Title :
Design of equiripple stopband even and odd order linear phase IIR filters
Author :
Takebe, Tsuyoshi ; Matsumoto, Toyoji ; Matsumura, Shuitsu ; Kato, Kyoko
Author_Institution :
Kanazawa Inst. of Technol., Ishikawa, Japan
Abstract :
This paper presents a method for designing even and odd order, equiripple stopband, arbitrary passband amplitude, perfect linear phase IIR transfer functions with mirror image pole pairs around the unit circle in the z-plane. Starting from a suitable nonlinear phase subfilter, the perfect linear phase transfer function is derived using an auxiliary allpass function in the transformed frequency domain. Design examples of passband flat amplitude lowpass filters are also shown
Keywords :
IIR filters; band-stop filters; filtering theory; linear phase filters; poles and zeros; transfer functions; arbitrary passband amplitude; auxiliary allpass function; equiripple stopband IIR filters; even order IIR filters; filter design method; linear phase IIR filters; mirror image pole pairs; nonlinear phase subfilter; odd order IIR filters; perfect linear phase IIR transfer functions; transformed frequency domain; Clocks; Design methodology; Educational institutions; Frequency domain analysis; IIR filters; Mirrors; Nonlinear filters; Passband; Poles and zeros; Transfer functions;
Conference_Titel :
Electronics, Circuits and Systems, 1998 IEEE International Conference on
Conference_Location :
Lisboa
Print_ISBN :
0-7803-5008-1
DOI :
10.1109/ICECS.1998.814049
