First note that max Im ( t) I = 2; therefore From this we
A plot of the message and the modulated signal is shown in Figure 3 .5.
For the message signal we have
Plots of the spectra of the message and the modulated signal are shown in Figure 3.6.
Note that the scales on the two spectra plots are different. The presence of the two delta functions in the spectrum of the modulated signal is apparent.
3. The power in the message signal can be obtained as