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Q#1 Analog Communication GATE EC 2002 MSQ +2 marks -0 marks

A DSBSC modulated signal  is corrupted by an additive white Gaussian noise of power spectral density W/Hz. The message power spectral density  is as shown in Figure and  is uniformly distributed over the range 0 to 2π.        

37.jpg

(a) Express the signal autocorrelation function  in terms of the message autocorrelation function. Clearly state the necessary assumptions.

(b) Determine the signal power spectral density

(c) Find the power of the modulated signal and the noise power in the transmissions bandwidth.

(a)

(b)

(c)
Power of modulated signal = 150 W
Noise power in transmitted. BW = 1.2 W

(c)
Power of modulated signal = 1.2 W
Noise power in transmitted. BW = 150 W

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