.

Similarly one may ask, why do we need demodulation?

So we must separate the higher carrier frequency. As the extra signals are mixed with message signal , it must be filtered. In the channel, it is also possible to add some noise to the modulated wave which should be rejected. That is why demodulation is needed.

why digital modulation is required? Digital modulation is used to transfer a digital bit stream over an analog channel at a high frequency. This enables us to transmit signals generated in a digital circuit across a physical medium. This is because digital signals can be handled with higher security and digital systems are readily and widely available.

In this way, what is meant by modulation and demodulation?

Modulation is the process of encoding information in a transmitted signal, while demodulation is the process of extracting information from the transmitted signal.

What are the advantages of modulation?

Advantages of Modulation Antenna size gets reduced. No signal mixing occurs. Communication range increases. Multiplexing of signals occur.