EC > GATE 2020 > Modulation and Demodulation
For the modulated signal x(t)=m(t)cos(2πfct), the message signal m(t)=4cos(1000πt) and the carrier frequency fc is 1 MHz. The signal x(t) is passed through a demodulator, as shown in the figure below. The output y(t) of the demodulator is
A
cos(460πt).
B
cos(920πt).
C
cos(1000πt).
D
cos(540πt).

Explanation

Correct : b

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