July 7, 2021

Before discussing about modulation and demodulation directly, we will consider an interesting example first. Let us consider that you want to send some “parcel” from Pune to Nasik. It is obvious that the parcel cannot move from Pune to Nasik on its own. What all you need to do is, to contact some courier company.

From the examples of communication discussed so far, now we can prepare the model of basic communication system. We know that for any communication to take place, three things are essential. They are, Transmitter (talker) Receiver (listener) and Channel or transmission medium. The above three things are present in any communication system. Whenever two people