(a) Show that the following scheme works for converting signals from passband to complex baseband: LPF...

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(a) Show that the following scheme works for converting signals from passband to complex baseband: LPF Si(t) (t)- 2 cos 2 fet LPF sq(t) -2 sin 2 fet (b) Find the complex baseband representation of the real-valued passband signal: s(t) = g(t) cos(2 fet+)+ f(t) sin(2 fet+) where g(t) and f(t) are real-valued signals with bandwidth W that is much smaller than fe. (a) Show that the following scheme works for converting signals from passband to complex baseband: LPF Si(t) (t)- 2 cos 2 fet LPF sq(t) -2 sin 2 fet (b) Find the complex baseband representation of the real-valued passband signal: s(t) = g(t) cos(2 fet+)+ f(t) sin(2 fet+) where g(t) and f(t) are real-valued signals with bandwidth W that is much smaller than fe.