Analog and Digital communication systems
Analog Communication System
Analog communication is that types of communication in which the message or information signal i.e transmitted is analog in nature. This means that in analog communication the modulating signal (i.e base-band signal) is an analog signal. This analog message signal may be obtained from sources such as speech, video shooting etc.
Digital Communication System
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.
Advantage of digital communication over analog communication system are
Increased immunity to channel noise and external interference.
Flexible operation of the system.
A common format for the transmission of different kinds of message signal (e.g voice signal, video signal , computer data ).
Improved security of communication through the use of encryption.
The advantage are attend however at the cost of increased transmission bandwidth and increased system complexity.
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