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  • Title: [The algorithm based on wavelet for canceling muscle electricity and wide range frequency of power line hum in ECG].
    Author: Zhao J, Hua M.
    Journal: Space Med Med Eng (Beijing); 2004 Jun; 17(3):224-8. PubMed ID: 15920849.
    Abstract:
    OBJECTIVE: To develop a wavelet noise canceller that cancels muscle electricity and power line hum in wide range of frequency. METHOD: 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. RESULT: By using the canceller, muscle electricity and power line interference between 49 Hz and 61 Hz were eliminated from the ECG signals. CONCLUSION: 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.
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