For the modulated signal x(t) m(t) = 4cos(1000rt) and the carrier frequency f, is 1 MHz. The signal x(t) is passed through a demodulator, as shown in the figure below. The output yt) of the m(t) cos{2nf t), the message signal %3D demodulator is

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For the modulated signal x(t) = m(t) cos{2nf_t), the message signal
m(t) = 4cos(1000rt) and the carrier frequency f, is 1 MHz. The signal x(t) is passed
through a demodulator, as shown in the figure below. The output yt) of the
demodulator is
Ideal LPF with cut-off 510 Hz
1
y(t)
x(t)
-f(Hz)
510
-510
cos(27(f, + 40)t)
(a) cos(1000rt)
(c) cos(920t)
(b) cos(540t)
(d) cos(460t)
Transcribed Image Text:For the modulated signal x(t) = m(t) cos{2nf_t), the message signal m(t) = 4cos(1000rt) and the carrier frequency f, is 1 MHz. The signal x(t) is passed through a demodulator, as shown in the figure below. The output yt) of the demodulator is Ideal LPF with cut-off 510 Hz 1 y(t) x(t) -f(Hz) 510 -510 cos(27(f, + 40)t) (a) cos(1000rt) (c) cos(920t) (b) cos(540t) (d) cos(460t)
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