Design of two IIR digital filters using a single complex filter

Author

Tokuda, Hirokuni ; Takahashi, Satoshi

Author_Institution

Dept. of Electr. Eng., Keio Univ., Tokyo

Volume

1

fYear

1996

fDate

26-29 Nov 1996

Firstpage

394

Abstract

It is shown that two properties of rational transfer functions with real coefficients are realized by means of a single complex IIR digital filter. Equivalently, the real and imaginary parts of output from a complex filter for a real input sequence correspond to real coefficient transfer function respectively. In a real signal processing, a delay operator z^-1 corresponds to a real operation. In this case, a complex transfer function is formed by connecting two real transfer functions with an imaginary unit. These real functions are approximated to the desired properties and are expressed by a complex coefficient transfer function

Keywords

Chebyshev approximation; IIR filters; delays; digital filters; filtering theory; sequences; signal processing; transfer functions; IIR digital filters design; complex Chebyshev approximation; complex IIR digital filter; complex coefficient transfer function; delay operator; imaginary part; rational transfer functions; real coefficient transfer function; real input sequence; real operation; real part; real signal processing; Approximation methods; Delay; Digital filters; Equations; Fourier transforms; Frequency response; IIR filters; Joining processes; Signal processing; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON '96. Proceedings., 1996 IEEE TENCON. Digital Signal Processing Applications

Conference_Location

Perth, WA

Print_ISBN

0-7803-3679-8

Type

conf

DOI

10.1109/TENCON.1996.608847

Filename

608847