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Does anyone know if digital signals (e.g. WIFI) are sent by frequency
modulation or amplitude modulation or something else? I read in
Wikipedia something about the phase difference between two or more
carrier frequencies encoding the ones and zeros but that sounds to me
like basically FM. I know the transmission frequencies are much
higher than AM or FM which makes sense if you want to send lots of
information. I need some simple (simplistic) explanation to follow a
simple explanation of AM and FM for my intro class.