Let us suppose that we have modeled signal using AR model, and suppose we have following model:
I used spectral estimation function from MATLAB
Now frequencies are given in normalized frequencies and I would like to know how to convert them back to real frequencies? From there it is clear that we have four deterministic model and also plus some white noise, actually I want to know approximate frequencies in each deterministic model. I can of course determine this frequencies using FFT, periodogram and so on, but I am studying application of the AR/ARMA model. So in my case, I have such frequencies on following figures, how can I determine actual frequencies? Thanks in advance.