Digital communications system

  Definition of digital communication system :  Digital communication is the physical transfer of data over Point-To-Point or Point-To-Multipoint communication channel. It is transfer of discrete messages. Digital communication plays a vital role in today’s electronic world. In digital communication the data transfer rate depends upon it’scharacterictics. Digital communication can be done over large distances through internet and other things. Block diagram of digital communication system:   Elements of Digital Communications System: Input transducer Source encoder Channel encoder Digital modulator Channel Digital demodulator Channel decoder Source decoder Output transducer 1. Input transducer This is a transducer which takes a physical input and converts it to an electrical signal . This block also consists of an analog to digital converter where a digital signal is needed for further processes. A digital signal is generally represented by a binary sequence.  2 . Source encoder :  Th