Title :
Adaptive notch filtering in impulsive noise environment
Author_Institution :
Signal Process. Lab., Tampere Univ. of Technol., Finland
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;
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
DOI :
10.1109/SMCIA.1999.782726
