Spectral Analysis by Stationary Time Series Modeling - Spectral Analysis: Parametric and Non-Parametric Digital Methods - page 156

Figure 6.9 presents the results of Prony modeling on this same signal made up of
three noisy sinusoids. Again, we realize that the three “lines” are better and better
estimated. The interest of the Prony modeling is to provide a “physical
interpretation” of the model by estimating the modal parameters of the analyzed
signal in terms of frequencies, amplitudes, phases and dampings.
Figure 6.8. AR spectrum evolution (compared to the periodogram) according to the order
(from 6 to 50) chosen for a signal made up of 3 sinusoids in a white noise
Figure 6.9. Prony spectra at orders 6, 12 and 20 of the three noisy sinusoids