Question

Explain the role of modulation and demodulation in communication system.

Answer 1

Answer:

Modulation is the process of combining the low-frequency signal with a very high-fre- quency radio wave called carrier wave (CW). The resultant wave is called modulated carrier wave. ... Demodulation is the process of separating or recovering the signal from the modulated carrier wave.At the broadcasting station, modulation is done to transmit the audio signal over larger distances to a receiver. When the modulated wave is picked up by the radio receiver, it is necessary to recover the audio signal from it. This process is accomplished in the radio receiver and is called demodulation.