I am doing a project on ECG arrythmia analysis using matlab.
I have designed notch filter for removing 50 Hz noise but don't know how to add a 50 Hz powerline interference noise to a clean ECG signal?
Also, I want to check whether noise is reduced in the filtered signal. Will Power spectral density using modified welch periodogram indicate whether noise is filtered or not?
How can I compare which wavelet (e.g. db6) is best suited for ECG analysis?