Electronics Engineering · Communication Systems
A sinusoidal carrier wave with amplitude Ac and frequency fc is amplitude modulated with a message signal m(t) having frequency 0 < fm << fc to generate the modulated wave s(t) given by: s(t) = Ac [1 + m(t)] cos(2πfct) The message signal that can be retrieved completely using envelope detection is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1m(t) = 2 cos(4πfmt)
- 2m(t) = 2 sin(4πfmt)
- 3m(t) = 1.5 sin(2πfmt)
- 4m(t) = 0.5 cos(2πfmt)✓
Correct answer
m(t) = 0.5 cos(2πfmt)
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