please help signal and systems!

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Image text transcribed for accessibility: Consider a message signal m(t) with the spectrum shown in Fig.1 The message bandwidth omega m = 2 pi X 103 rad/s. The signal is applied to a product modulator, together with a carrier wave Ac cos(omega c t), producing the DSB-SC modulated signal s(t). The modulated signal is next applied to a coherent detector. Assuming perfect synchronism between the carrier waves in the modulator and detector, determine the spectrum of the detector output when the carrier frequency omega c = 2.5 pi times 103 rad/s and the carrier frequency omega c = 1.5 pi times 103 rad/s. What is the lowest carrier frequency for which each component of the modulated signal s(t) is uniquely determined by m(t)?

Answers (1)

  • Anonymous
    Rating:5 stars

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