Communication miscellaneous
- Signal x(t) = 5 (1 + 2 cos 2000 πt) can be recovered by
(i) envelop detector
(ii) synchronous detector
(iii) square law
-
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The given signal
x(t) = 5 (1 + 2 cos 2000 πt) cos 106t
On comparing this equation with standard AM modulated wave equation
x(t)=Ac (1 + μ cos ωmt) cos ωct
we get, μ = 2, which is > 1
Hence it cannot be recovered by the envelop detector.
Therefore, choice (C) is the correct choice.Correct Option: C
The given signal
x(t) = 5 (1 + 2 cos 2000 πt) cos 106t
On comparing this equation with standard AM modulated wave equation
x(t)=Ac (1 + μ cos ωmt) cos ωct
we get, μ = 2, which is > 1
Hence it cannot be recovered by the envelop detector.
Therefore, choice (C) is the correct choice.
