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Question
Answer briefly.
Explain the necessity of a carrier wave in communication.
Answer in Brief
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Solution
- Without a carrier wave, the input signals could be carried by very low-frequency electromagnetic waves but it will need quite a bit of amplification in order to transmit those very low frequencies.
- The input signals themselves do not have much power and need a fairly large antenna in order to transmit the information.
- Hence, it is necessary to impose the input signal on the carrier waves as it requires less power in order to transmit the information.
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Communication System
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Chapter 13: Electromagnetic Waves and Communication System - Exercises [Page 241]
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