A binary PAM signal is generated by exciting a raised cosine roll-off filter with a 50 percent roll-off factor and is then DSB/SC amplitude-modulated on a sinusoidal carrier as illustrated in Figure P9.21. The bit rate is 2400 bits/s.
a. Determine the spectrum of the modulated binary PAM signal and sketch it.
b. Draw the block diagram illustrating the optimum demodulator/detector for the received signal, which is equal to the transmitted signal plus additive white Gaussian noise.