[The algorithm based on wavelet for canceling muscle electricity and wide range frequency of power line hum in ECG].
OBJECTIVE
To develop a wavelet noise canceller that cancels muscle electricity and power line hum in wide range of frequency.


METHODS
According to the feature that the QRS complex has higher frequency components, and the T, P wave have lower frequency components, the biorthogonal wavelet was selected to decompose the original signals. An interference-eliminated signal ECG was formed by reconstruction from the changed coefficients of wavelet.


RESULTS
By using the canceller, muscle electricity and power line interference between 49 Hz and 61 Hz were eliminated from the ECG signals.


CONCLUSIONS
This canceller works well in canceling muscle electricity, and basic and harmonic frequencies of power line hum. The canceller is also insensitive to the frequency change of power line, the same procedure is good for both 50 and 60 Hz power line hum.
Zhao
Jie
J
School of Physics and Electronics Shangdong Normal University, Jinan, China. zhaojie@beelink.com
Hua
Mei
M
D000465:Algorithms; D004560:Electricity; D004562:Electrocardiography; D009132:Muscles / Q000502:physiology; D012815:Signal Processing, Computer-Assisted