what is modulation
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal which typically contains information to be transmitted.odulation in a modem is process of modification one of the parameters of carrier signal(periodical signal; sin/cos wave in this case) with the message signal(random digital signal in this case, string of 0âs and 1âs) so that can be transmitted over the network.