Question:
The modulation index of amplitude modulation system is limited to unity because
The modulation index of amplitude modulation system is limited to unity because
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An important characteristic of amplitude modulation is that it works well for modulation index below 1, which prevents distortion during envelope detection.
Updated On: Feb 27, 2025
- transmission requires higher power for higher values of modulation index
- modulated signal bandwidth is higher for higher values of modulation index
- demodulated signal is distorted while coherent receiver is used
- demodulated signal is distorted while envelop detector is used as receiver
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The Correct Option is D
Solution and Explanation
The modulation index in amplitude modulation (AM) is limited to unity because if it exceeds 1, it leads to overmodulation and distortion of the signal in a standard envelope detector. This distortion makes the demodulated signal at the receiver unreliable, making it difficult to recover the intended signal.
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