Elements of basic communication system
- Information source
In the transmission section, first of all, the source generated information is fed to the input
transducer, which converts energy of one form to another form, usually in the electrical
form. This electrical signal or base band signal is sent to the transmitter.
- Transmitter:
Transmitter modifies the information signal for efficient transmission. It modulates the information signal with a high frequency carrier. After processing the signal transmitter transmits the signal through channel to the receiver.
- Channel:
Channel, media or path implies the medium through which the message travels from the transmitter to the receiver . A channel acts partly as a filter to attenuate the signal and distorts its waveform. The signal attenuation increases with the length of the channel. There are different types of channel exist for different communication system, such as, wire, coaxial cable, wave-guide, optical fiber or radio link through which transmitter output is sent.
- Receiver:
Receiver reprocesses the signal received from the channel by undoing the signal modifications made at the transmitter and the channel . The receiver output is fed to the output transducer, which converts the electrical signal to its original form . By this way, the signal reached to its destination, to which the message is communicated.
- Destination (where the information will be placed)