About Hammerstein-Wiener model.

Hello All,

Is the linear part of the Hammerstein-Wiener model an output error (OE) model?

If i use the wavenet as nonlinearity estimator in both input-output model, how does the linear part will be estimated? what is the algorithm used by Matlab?

I've read the tutorial on the site, but I could not understand. Can anyone help me?