Answer Happy

Problem 2) You are asked to design a DSB-SC modulator to generate a modulated signal km(t)cos(at), where m(t) is a signal band-limited to B Hz. The figure below shows a DSB-SC modulator available in the stock room. The carrier generator available generates not cos(1) but cos' (t). Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. a) What kind of filter is required in the figure below? b) Determine the signal spectra at points b and c, and indicate the frequency bands occupied by these spectra. c) What is the minimum usable value of @? d) Would this scheme work if the carrier generator output were cos (1)? Explain. e) Would this scheme work if the carrier generator output were cos ? m(t) cos (w₂1) Filter cos" (1) for any integer n ≥ 2 I km(t) cos(w_t) -2B M(w) 0 (b) 2TB