engineering recuitment GATE ECE 2023-24 Test Series Communication Systems Amplitude Modulation Double Sideband Suppressed Carrier(DSB-SC) Modulation
For the modulated signal x(t) = m(t) cos (2πfct), the message signal m(t) = 4 cos (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
1
cos(460πt)
2
cos(920πt)
3
cos(1000πt)
4
cos(540πt)