Question

The signal m(t) = cos 2000πt + 2 cos 4000t is multiplied by the carrier c(t) = 100 cos 2π fct
where fc = 1 MHz to produce the DSB signal. The expression for the upper-side band (USB)
signal is
(a) 100 cos(2π(fc +1000)t) + 200 cos(2π(fc +200)t)
(b) 100 cos(2π(fc – 1000)t) + 200 cos(2π(fc - 2000)t)
(c) 50 cos(2π(fc + 1000)t) + 100 cos(2π(fc + 2000)t)
(d) 50 cos(2π(fc - 1000)t) - 100 cos(2π(fc - 100)t)​

Answer 1

Answer:

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