Dynamic powerline interference subtraction from biosignals.
The performance of a previously developed and widely used method for powerline interference subtraction from the ECG is slightly reduced in the presence of continuous well-expressed EMG noise. Applying automatic adaptation of the 'linearity criterion' value in accordance to the ECG/noise ratio, the best conditions for application of the procedure can be obtained. The proposed method allows for reduction of possible distortions when applied on noise-free ECG and enhances its efficiency in the presence of non-powerline noise. Apart from ECG, it is applicable to impedance-cardiogram, plethysmogram, EEG and other biosignals.
Christov
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II
Centre of Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria.
D016477:Artifacts; D002307:Cardiography, Impedance / Q000379:methods*; D011211:Electric Power Supplies; D004562:Electrocardiography / Q000379:methods*; D004569:Electroencephalography / Q000379:methods*; D008955:Models, Cardiovascular; D012815:Signal Processing, Computer-Assisted