let the modulating signal mt be a sinusoid of the

Question

Let the modulating signal m(t) be a sinusoid of the form m(t) = cos 2πf_mt, f_m << f_c, and let the carrier signal be cos(2πf_ct + φc).

(a) Determine the conventional AM signal, its upper and lower sidebands, and its spectrum if the modulation index is α.

(b) Determine the DSB SC AM signal, its upper and lower sidebands, and its spectrum for m(t) = α cos 2πf_mt, fm << f_c.

(c) Determine the two possible SSB AM signals and their spectra.