Analog and Digital Communication

Analog and Digital communication:

Analog communication is that type of communication in which message or information signal to be transmitted is analog in nature. This means that in analog communication the modulation signal is an analog signal. This analog message signal may be obtained from sources as speech, video shooting etc… In analog communication, the analog message signal modulates some high carrier frequency inside the transmitter to produce modulated signal.

In digital communication, the message signal to be transmitted is digital in nature. This means that digital communication involves the transmission of information in digital form.

Advantages of Digital Communication:

1. The digital communication systems are simpler and cheaper compare to analog communication systems because of advances made in IC technologies.
2. In digital communication, the speech, video and other data may be merged and transmitted over a common channel using multiplexing.
3. Using data encryption, only permitted receivers may be allowed to detect the transmitted data.
4. Since the transmission is digital and the channel encoding is used, therefore the noise does not accumulate from repeater or repeater in long distance communications.