Question

Q2 The output signal of an angle modulator is given as V(t) = 6 cos(2000000net + 40 cos(2000xt) + 15cos (400nt)) (v) Determine the following: The average power of the signal. b) The carrier frequency of the signal. The instantaneous frequency of the signal. d) The instantaneous maximum frequency deviation of the signal. e) The wavefom of the message signal, assuming a frequency modulation (FM). f) The modulation index, assuming a FM. Is it a broadband FM or narrowband FM signal following f)? h) The effective bandwidth of the signal following f). i) If this is a phase modulation, what is the instantaneous maximum phase g)

Answer 1

as as follows compicue the signal vet) = Ac cosi[2nitet +mct)) (t) = Am cos 21Tf mt average power p = Ž Ac? so x 62 = 18 b) camer frequency f 1000000 = coo H2 instantaneous frequency filt) 2 fet en met)

filt) 1000000 + (:40C0S (2000 TTJ+ IS COS (4.00TL)) ins taneous maar frequency frequency denation = ßem of 3 40x10 of .40 kHz