MATLAB: Correlation between mother wavelet and ECG signal

Question

Hi all,

I am doing wavelet denoising for my ECG signal. In order to choose best mother wavelet for my signal, i have to correlate it first with my input signal.

How can i correlate a mother wavelet and ECG signal in Matlab? I can correlate two ECG signals, but not a mother wavelet and a ECG signal.

This due to the fact that i cannot get mother wavelet in an array. All i get is "db4" or "db8" as a character. How can i get a mother wavelet into an array and correlate with my signal?

Answer 1

The results for wavelet denoising should not be that heavily dependent on the choice of wavelet.

For EEG data, I would recommend starting with one of Daubechies' least asymmetric wavelets with at least 4 vanishing moments, 'sym4' for example.