Wireless Radio Communication System Block Diagram

A Radio Communication system is a wireless communication system, where the radio wave or radio signal is used to transfer signal or information or data through the space medium. So there is no need for wires or electrical conductors for transfer signals. You can see the examples of the radio communication system in mobile towers, broadcasting, etc. The radio communication system reduces the hazard of wire connections, facilitates portability, etc. First of let's see the block diagram of radio communication system to understand its working principle.

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As per the above radio communication block diagram, the upper blocks or part is the sending end circuit whereas the lower blocks or lower part is the receiving end circuit. Now let's go to discuss about these parts or blocks, so it will help to understand the working principle of a radio communication system.

Input Transducer

It is a device that converts the physical quantity or physical change into electrical signals. Microphones, cameras, keyboards, etc can be examples of input transducers. So user can input their information to the system through these input transducers. So the input transducer is the first part of any communication system.

Baseband Processor

The baseband processor performs so many tasks but the main function is it helps to convert the normal signal into a high-frequency radio signal. Baseband processors also perform signal processing work. In most of the cases, it is set up with analog to digital converter and digital to analog converter circuits.


The encoder is a device that encodes the signal which means it compresses or reduces the bits for reducing size and safety.


It modulates the signal or mixed the actual signal with a carrier signal.

Up Converter & Power Amplifier

Upconverter is used to increase the frequency of the signal to reduce the chances of data loss during the transmission. The power amplifier amplifies the signal strength so that can be transmitted over a long distance.

Radio Transmitter

It transmits the signal through space using the Antenna.

Radio Receiver

It receives the radio signal through the receiving end antenna. The antenna is a very important device for sending or receiving the radio signals.

Down Converter

It decreases the frequency of the signal to the actual value. At the sending end, the frequency of the signal is increased whereas, at the receiving end, the frequency of the signal is decreased.


It demodulates the signal which means it separates the carrier signal and the actual signal.


It decodes the signal or information to its original format as sent by the sender.

Output Transducer

At the sending end, the physical quantity or information is converted into an electrical signal through the input transducer. The output transducer is opposite to the input transducer it converts the electrical signal into physical form. Display, monitors, speakers, printers are examples of output transducers.

So, you may understand the radio communication system is almost the same as others just the difference is it uses the radio signal for the information transmission purpose.

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Wireless Radio Communication System Block Diagram Wireless Radio Communication System Block Diagram Reviewed by Author on 2/09/2022 Rating: 5
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