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Questions
Explain the term demodulation used in a communication system.
With reference to communication systems, what is meant by demodulation?
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Solution
Demodulation is the process of retrieving information from the carrier wave at the receiver end. It is the reverse process of modulation.
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Explain the terms : Transmitter in communication system
Write the functions of the following in communication systems:
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Demodulator
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A 1 KW signal is transmitted using a communication channel which provides attenuation at the rate of – 2dB per km. If the communication channel has a total length of 5 km, the power of the signal received is `["gain in dB" = 10 log ("P"_0/"P"_"i")]`
A basic communication system consists of ______.
- transmitter.
- information source.
- user of information.
- channel.
- receiver.
Choose the correct sequence in which these are arranged in a basic communication system:
Figure shows a communication system. What is the output power when input signal is of 1.01 mW? (gain in dB = 10 log10 (Po/Pi).
