COMMUNICATION SYSTEMS
Communication is a process of transfer of information bearing signals
from one place to another. The equipment that transmits the information
is the transmitter and the equipment that receives the information is the
receiver. Channel is the medium through which the signal travels from
the transmitter to the receiver. Telegraphy, telephony, facsimile, radio
broadcast, TV transmission and computer communication are a few
examples of communication services.
Block Diagram of Communication System
The basic function of a communication system is to communicate a
message. The block diagram of a communication system is shown
The information to be transmitted is given by the information source. In
most of the cases, the information will be non-electrical in nature. For
example, audio signals in speech transmission and picture signals in
television transmission.
This information in the original form is converted into a corresponding
electrical variation known as the message signal by using a transmitter.
This message signal cannot be directly transmitted due to various reasons.
Hence this message signal is superimposed on a high frequency carrier
signal before transmission. This process is referred to as modulation.
Communication is a process of transfer of information bearing signals
from one place to another. The equipment that transmits the information
is the transmitter and the equipment that receives the information is the
receiver. Channel is the medium through which the signal travels from
the transmitter to the receiver. Telegraphy, telephony, facsimile, radio
broadcast, TV transmission and computer communication are a few
examples of communication services.
Block Diagram of Communication System
The basic function of a communication system is to communicate a
message. The block diagram of a communication system is shown
The information to be transmitted is given by the information source. In
most of the cases, the information will be non-electrical in nature. For
example, audio signals in speech transmission and picture signals in
television transmission.
This information in the original form is converted into a corresponding
electrical variation known as the message signal by using a transmitter.
This message signal cannot be directly transmitted due to various reasons.
Hence this message signal is superimposed on a high frequency carrier
signal before transmission. This process is referred to as modulation.
