Find out the amplitude ,frequency and phase displacement for given QPSK signal (a) 100 cos(25t+π/4). (b)...

Find out the amplitude ,frequency and phase displacement for given QPSK signal

(a) 100 cos(25t+π/4).

(b) 33.33 sin (350t+ 3π/4) .

Solutions

Expert Solution

A standard trigonometric signal is represented as Acos(2f t + ) or Asin(2f t + ), where A is amplitude f is frequency and is phase displacement

Now from the given signals

a) 100cos(25t + /4) comparing with sandard cosine signal

Amplitude = 100

frwquency = 2f = 25 => f = 25/(2) = 3.98 Hz

phase displacement = /4 rad

b) 33.33sin(350t + 3/4) comparing with sandard sine signal

Amplitude = 33.33

frequency = 2f = 350 => f = 350/(2) = 50.704 Hz

phase displacement = 3/4 rad

Manojponduru answered 1 year ago

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