Question

Draw a labeled block diagram of the radio communication system

Answer 1

Hint: A communication system is a mode of information transfer (usually from the sender to the receiver via a suitable channel). Communication equipment are the various types of electrical equipment that are assembled to form a communication system. A radio communication system makes the use of radio waves to transfer information across space.

Complete step by step answer:

The communication system starts with an input signal (which is the information to be transmitted to the receiver) at the sender’s end. The information/signal to be communicated is generally in digital form, so to be transmitted across space, it needs to be converted to radio frequency signals. This is what the baseband processor does for us. A modulator is a device that embeds the signal waveform with a carrier waveform. Modulation aims to transfer the digital data over a limited radio frequency band. At the receiver’s end, there’s a demodulator which again separates the signal waveform from the carrier waveform. We can also use a modem (modulator-demodulator) which is a device capable of both the functions. While transmitting, the signal is converted into a higher frequency to prevent loss in intensity due to atmospheric obstructions. This is achieved using an upconverter. On the receiver’s end, a down converter is used to again reduce the frequency of the signal before it is demodulated. A power amplifier increases the magnitude of the power of a given input signal so that multiple output devices can be driven at the same time. The modulated, amplified signal is now transmitted through the antenna into space, the receiver antenna catches these signals and it is then demodulated and processed to extract information.

Note: A few of the many advantages of radio communication include its affordability and wide reach. The setup to transmit a radio signal is very economical and anyone with a receiver setup may receive the information. Some examples of the radio communication system are mobile communication, radar communication, television broadcasting, etc.