COMMUNICATION

SYSTEMS

BY

VISHAL KUMAR SINHA

IIT KHARAGPUR

.

FATHER OF WIRELESS

TECHNOLOGY

J.C.BOSE

.

.

.

THREE BASIC ELEMENTS OF COMMUNICATION SYSTEM :

TRANSMITTER MEDIUM RECEIVER

TWO BASIC MODES OF COMMUNICATION

POINT TO POINT

EG -TELEPATHY

BROADCAST

EG –RADIO,TELEVISION

.

THERE ARE THREE TYPES OF MODULATION

AMPLITUDE MODULATION

(AM)

FREQUENCE MODULATION

(FM)

PHASE MODULATION

(PM)

C(t) = A ͨsin( w ͨt + Φ ) ͨ

[SIGNAL STRENGTH]