A new method for reducing signal-overlapping noise in standard electrocardiogram

A new method is developed for reducing signal-overlapping noise in the standard electrocardiogram, which has so far been difficult with a traditional filter based on the frequency method. The new method, called signal decomposition method, first separates the input signal into a noise-free part and a noise-overlapping part with a zero-phase low-pass filter. It then restores the signal components from the noise-overlapping part and adds the signal components to the noise-free part so as to eliminate distortion of the original signal. An experimental study with clinical ECG data shows that this method is very effective in reducing signal-overlapping noise and power interference, with little signal distortion