I have done a power spectrum density estimate using Bartlett's method. However, I was wondering if it is also possible to get a sense of the variation of the averaged spectra.
Unfortunately, I have not found a method for this problem, so any reference is most welcome!
I have plotted the mean and std of the DFT amplitudes (no normalisation), which at least does not look completely off.
However, I am not sure how I would normalise the std values for the power spectrum. Also, is there any useful interpretation of these values?
Thanks in advance!