Q14) The spectrum of a real-valued information signal s(t) was measured and is zero for all frequencies above 4 kHz (see

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Q14 The Spectrum Of A Real Valued Information Signal S T Was Measured And Is Zero For All Frequencies Above 4 Khz See 1 (54.92 KiB) Viewed 23 times

Q14) The spectrum of a real-valued information signal s(t) was measured and is zero for all frequencies above 4 kHz (see Fig. Q14). Suppose s(t) is fed into an AM-DSB-C modulator with carrier frequency fc = 10 kHz to obtain the modulated signal Sam(t) = 10 *(1 +0.5s(t)) cos(21fct). = AS(f) 1 Fig. 214 12 0 2 4 f (kHz) (a) Sketch the magnitude spectrum of Sam(t). (b) Estimate the bandwidth of Sam(t). [3 marks] [3 marks]