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Amplitude and Frequency/Phase Modulation Explained

on 20.10.2011 at 09:22 by Michele Zaffalon
I always had difficulties in understanding frequency modulation (FM) and its frequency spectrum. Even for the pure tone modulation, the FM spectrum consists of an infinite number of sidebands whose signs change from one sideband to the next one and whose amplitudes are given by the horrible Bessel functions. I have a pictorial representation of AM/FM that helped me understand the sidebands.

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