Let s(t) be an angle modulated signal: s(t) = A_c cos[w_c t + (t)] Where (t) = {k_p m(t) PM k_f...

Let s(t) be an angle modulated signal: s(t) = A_c cos[w_c t + (t)] Where (t) = {k_p m(t) PM k_f s_-infinity^t m(lambda)d lambda FM and m(t) is the modulating signal. obtain the following expression for narrowband PM and FM signals if | (t)| << |: s(t) = A_c - A_c (t) sin w_c t Sketch the amplitude and phase spectra of s(t) for PM m(t) = sin C (2 w t). Repeat part for FM. Find the bandwidth of the modulated signal in part(c) using carson's rule. Draw a block diagram for a narrowband FM modulated. Draw a block diagram for a coherent narrowband PM demodulator. g) Find the envelope of a narrowband angle modulated signal.