Frequency shift of two-dimensional real coefficient zero phase FIR digital filters

Author

Zahradník, Pavel ; Unbehauen, Rolf

Author_Institution

Dept. of Circuits Theory, Czech Tech. Univ., Prague, Czech Republic

Volume

1

fYear

1995

fDate

30 Apr-3 May 1995

Firstpage

331

Abstract

The paper concerns the frequency shift of the frequency response of two-dimensional (2-D) real coefficient zero phase finite impulse response (FIR) digital filters. Three types of the frequency shift are considered. The frequency shift allows one to move the passband of the filter in the frequency plane. By this way useful frequency transformations, e.g. lowpass to bandpass or lowpass to high-pass filter are easily achievable. The frequency shift is performed in purely analytical form. Formulas describing the mutual relation between the original impulse response and the transformed one are derived. The frequency shift is used in fast (re)design of 2-D FIR filters. The application in adaptive filtering is advantageous. Some examples are included. Side-effects of the frequency shift are mentioned

Keywords

FIR filters; adaptive filters; frequency response; two-dimensional digital filters; FIR digital filters; adaptive filtering; frequency response; frequency shift; frequency transformations; real coefficient filters; two-dimensional digital filters; zero phase filters; Adaptive filters; Band pass filters; Circuit theory; Digital filters; Filtering theory; Finite impulse response filter; Frequency response; Passband; Shape; Two dimensional displays;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

0-7803-2570-2

Type

conf

DOI

10.1109/ISCAS.1995.521518

Filename

521518