U18ECI5201 - Communication Engineering – I
Module 1 - Introduction to Communication Systems
Topic 1 - Electronic Communication Systems
Dr.S.Sasikala
Associate Professor
Department of Electronics and
Communication Engineering
Have you ever pictured
yourself living in a world
without any communication
system?
What is communication?
• Transfer of information from one place to another.
• Should be efficient, reliable and secured
Ways to Communicate
• Communication between Human Beings
• Form of hand gestures and facial expressions
• Verbal grunts and groans
• Long Distance Communications
• Smoke signals
• Telegraph
• Telephone
• Wireless Radio Signals
• Commercial Radio Broadcasting
Brief History for Communication
Year
1844
1876
1904
1923
1936
1962
1966
1972
1989
Events
Telegraph
Telephone
AM Radio
Television
FM Radio
Satellite
Optical links using laser and fiber optics
Cellular Telephone
Internet
What is a communication System?
• Components / Subsystems act together to accomplish
information transfer / exchange
What is an Electronic communication System?
• Transmission, Reception and Processing of information between
two or more locations using electronic circuits
Basic Requirements of Communication System
• Rate of information transfer
• How fast the information can be transferred
• Purity of the signal
• Whether the signal received is the same as the signal being transmitted.
• Simplicity
• Reliability
Building Blocks or Elements of a
Communication System
Summary
Communication
Communication system
Building blocks of a communication system