Prony´s method versus FFT for analyzing power converters signals

This paper compares the Prony´s method and the fast Fourier transform (FFT), for analyzing signals of power electronic devices, particularly power converters. The theoretical features of both techniques are analyzed and their differences are highlighted. The two techniques have been applied to synthetic signals that emulate converter signals. The results show that Prony is a good alternative when one is dealing with short-time windows of analyzed signals although is sensitive to noise