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a) What is the role of an envelope detector in AM communication system? Briefly describe its operation. b)What is modulation index? How should we design

a) What is the role of an envelope detector in AM communication system? Briefly describe its operation.

b)What is modulation index? How should we design the modulation index to avoid distortion?

c)Two requirements are needed to ensure proper modulation and avoid distortion in the process of amplitude modulation. What are the two requirements?

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