Analogical signal analysis method by mean of fast Fourier transforms (FFT)

P.SULMONT, Professeur
D. RAJAONA, Ingénieur de Recherche Laboratoire d’Hydrodynamique Navale -ENSM -Nantes

The proposed analysis method, based on FFT, allows to suppress the leakage effect drawback of a periodic signal, without needing to adapt the sampling frequency to the fundamental frequency of the phenomenon. The analysis of an arbitrary si9nal can be made by separating its periodic elements. A more accurate determination of the signal power, is obtained, using FFT, by numerical integrations with Simpson's method.

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