Open AccessOn-line adaptive line frequency noise cancellation from a nuclear power measuring channel
Author(s) -
Javed Qadir,
Masood Iqbal,
Hameed S. Qaiser
Publication year - 2011
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp1103266q
Subject(s) - noise (video) , signal (programming language) , computer science , line (geometry) , noise floor , acoustics , active noise control , adaptive filter , noise power , filter (signal processing) , noise measurement , electronic engineering , line filter , band stop filter , channel (broadcasting) , power (physics) , physics , noise reduction , low pass filter , telecommunications , algorithm , engineering , mathematics , artificial intelligence , computer vision , image (mathematics) , geometry , quantum mechanics , programming language
On-line software for adaptively canceling 50 Hz line frequency noise has been designed and tested at Pakistan Research Reactor 1. Line frequency noise causes much problem in weak signals acquisition. Sometimes this noise is so dominant that original signal is totally corrupted. Although notch filter can be used for eliminating this noise, but if signal of interest is in close vicinity of 50 Hz, then original signal is also attenuated and hence overall performance is degraded. Adaptive noise removal is a technique which could be employed for removing line frequency without degrading the desired signal. In this paper line frequency noise has been eliminated on-line from a nuclear power measuring channel. The adaptive LMS algorithm has been used to cancel 50 Hz noise. The algorithm has been implemented in labVIEW with NI 6024 data acquisition card. The quality of the acquired signal has been improved much as can be seen in experimental results