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Signals and Systems

What is Signal and System?
•To be transmitted, datamust be transformed intoElectromagnetic signals.

 What is Signal? 
•Signal is a function of independent variables that carry some information.

Incommunication system, a transmitter encodes a message into a signal, which is carried to a receiver by the communications channel.

What is System?

System is any physical set of components or devices that take a signal, and produces a signal.

Example1 :
  • Communication system ( Messaging, VOIP,...)
  • Electrical system (turbine in dam,..)
  • Mechanical system(pulley, wheel,..)
Example2 :

    System in the electric circuit :







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