Discussion on the -3 dB rejection bandwidth of IIR notch filters

Author

Wang, Xiao-Long ; Ge, Yun-Jian ; Zhang, Jian-Jun ; Song, Quan-Jun

Author_Institution

Dept. of Autom., Univ. of Sci. & Technol. of China, China

Volume

1

fYear

2002

fDate

30-30 Aug. 2002

Firstpage

151

Abstract

This paper is concerned with the -3 dB rejection bandwidth of IIR notch filters. First, a general form of infinite impulse response (IIR) notch filters is presented. Then, the relationship between the bandwidths and the convergent speed of filtered signals is discussed. And, the accurate algorithm for this relationship is deduced. The conclusion is: the only factor to determine the convergent speed of filtered signals is the -3 dB rejection bandwidths of the IIR notch filters. Furthermore, an algorithm of practical IIR notch filters is given based on the previous relationship. Important statements are all verified and illustrated by simulations or applications.

Keywords

IIR filters; convergence of numerical methods; notch filters; IIR notch filters; convergent speed; filtered signals; infinite impulse response notch filters; rejection bandwidth; signal processing; Automation; Bandwidth; Digital filters; Finite impulse response filter; Frequency; IIR filters; Interference elimination; Machine intelligence; Paper technology; Signal processing algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing, 2002 6th International Conference on

Conference_Location

Beijing, China

Print_ISBN

0-7803-7488-6

Type

conf

DOI

10.1109/ICOSP.2002.1181011

Filename

1181011