Question 4 Given the expression for an AM signal s(t) A.(axm(t)) cos(2) where m(t) cos(2ft) Ac 10V a

Question 4 Given the expression for an AM signal s(t) A.(axm(t)) cos(2) where m(t) cos(2ft) Ac 10V a 0.4 fc 10 kHz fm 2 kHz = (a) Determine Fourier transform and sketch the amplitude and phase spectrum of the AM signal s(f) (b) Calculate the total power of the AM signal s(t) (c) Calculate the power in the message signal m(t) (d) Calculate the efficiency of the AM signal s(i)

 

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