Btech Tuition in Delhi : tejas engineers academy
Saturday: 3 pm to 6 pm
Topic: Introduction and Modulation need
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of Lectures of B.Tech tuitions being
conducted in the academy.
Communication is the process of establishing connection or link between
two points for information exchange.
The electronic equipments which are used for communication purpose are
called communication equipments when assembled tighter form a communication
systems. Typical examples of communication system are line telephony and line
telegraphy, radio telephony and radio telegraphy, radio broadcasting , point to
point communication and mobile communication , computer communication, radar
communication, television broadcasting radio telemetry radio aids to
navigation, radio aids to aircraft landing etc.
The earliest communication system namely line telegraphy originated in
eighteen forties. In addition to this line telephony came a few decades later
whereas radio communication could become possible in the beginning of twentieth
century on invention of triode valve.
Radio communication was further greatly improved during world war 2. It
became more widely used through the invention of transistor, integrated
circuits and other semiconductor devices in the subsequent years. Also in
recent years, communication has become more widespread with the use of
satellites and fiber optics. Today, there has been an increasing emphasis on
the use of computers in communication.
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