Adaptive notch filtering in impulsive noise environment

Author

Vainio, Olli

Author_Institution

Signal Process. Lab., Tampere Univ. of Technol., Finland

fYear

1999

fDate

1999

Firstpage

152

Lastpage

155

Abstract

An adaptive digital notch filter is considered for 50/60 Hz line frequency signal processing. An adaptive algorithm allows tracking of the main frequency component such that the notch frequency is the only changing parameter. Since the power line frequency is known to within a narrow tolerance band, it is possible to apply soft or hard limiting on the notch frequency. Soft and hard limiting are compared for Laplacian noise, and the effect of filtering is investigated for a signal with strong harmonic contents

Keywords

adaptive filters; adaptive signal processing; impulse noise; notch filters; tracking; 50 Hz; 50 Hz line frequency signal processing; 60 Hz; 60 Hz line frequency signal processing; Laplacian noise; adaptive algorithm; adaptive digital notch filter; hard limiting; impulsive noise environment; main frequency component tracking; notch frequency; power line frequency; soft limiting; strong harmonic contents; tolerance band; Adaptive filters; Adaptive signal processing; Digital filters; Digital signal processing; Filtering; Frequency; Limiting; Power harmonic filters; Signal processing algorithms; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Soft Computing Methods in Industrial Applications, 1999. SMCia/99. Proceedings of the 1999 IEEE Midnight-Sun Workshop on

Conference_Location

Kuusamo

Print_ISBN

0-7803-5280-7

Type

conf

DOI

10.1109/SMCIA.1999.782726

Filename

782726