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In: Electrical Engineering

For each of the baseband signals: (i) ?(?) = cos 1000?; (ii) ?(?) = 2 cos...

For each of the baseband signals: (i) ?(?) = cos 1000?; (ii) ?(?) = 2 cos 1000? + cos 2000?

(a) Sketch the spectrum of m(t).

(b) Sketch the spectrum of the DSB-SC signal ?(?) cos 10000?.

(c) Identify the upper sideband (USB) and the lower sideband (LSB) spectra.

(d) Identify the frequencies in the baseband, and the corresponding frequencies in the DSB-SC, USB, and LSB spectra. Explain the nature of frequency shifting in each case.

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