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

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W Q14 The Spectrum Of A Real Valued Information Signal S T Was Measured And Is Zero For All Frequencies Above 4 Khz S 1 (25.59 KiB) Viewed 41 times

w 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 fe = 10 kHz to obtain the modulated signal Sam(t) = 10 x (1 + 0.5s(t)) cos(2nfet). AS 1 Fig. Q14 12 01 2 f (kHz) (a) Sketch the magnitude spectrum of Sam(t). (b) Estimate the bandwidth of Sam(t). [3 marks] [3 marks]