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प्रश्न
Answer briefly.
Explain the necessity of a carrier wave in communication.
थोडक्यात उत्तर
उत्तर
- 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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Introduction to Communication System
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पाठ 13: Electromagnetic Waves and Communication System - Exercises [पृष्ठ २४१]
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