The message signal m(t) = 3 cos (260t) + 6 cos(27120t) along with the carrier signal...

 

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The message signal m(t) = 3 cos (2π60t) + 6 cos(27120t) along with the carrier signal c(t) = 4 cos(271200t) are applied to a modulator that generates the double sideband suppressed carrier signal s(t). The demodulator is as shown in the figure below. It consists of a multiplier followed by a low pass filter, where the locally generated signal is c'(t) = 2 cos(2π1200t + π/4) and the bandwidth of the low pass filter is 100 Hz. s(t) X v(t) c'(t) = 2 cos(2π1200t + π/4) Low pass filter B.W 100 Hz - a. Find the bandwidth of m(t). b. Find the time-domain expression of the modulated signal s(t). c. Find the total average transmitted power. d. Find the signal at the demodulator output. y(t) The message signal m(t) = 3 cos (2π60t) + 6 cos(27120t) along with the carrier signal c(t) = 4 cos(271200t) are applied to a modulator that generates the double sideband suppressed carrier signal s(t). The demodulator is as shown in the figure below. It consists of a multiplier followed by a low pass filter, where the locally generated signal is c'(t) = 2 cos(2π1200t + π/4) and the bandwidth of the low pass filter is 100 Hz. s(t) X v(t) c'(t) = 2 cos(2π1200t + π/4) Low pass filter B.W 100 Hz - a. Find the bandwidth of m(t). b. Find the time-domain expression of the modulated signal s(t). c. Find the total average transmitted power. d. Find the signal at the demodulator output. y(t)

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Solutions Step 1 Lets solve each part of this problem step by step a Find the bandwidth of mt The message signal mt is given as mt3cos260t6cos2120t The bandwidth of a signal is defined as the differen... View the full answer