Question

Using QAM we wish to transmit the following baseband message signals Bcos (w t a) Show the time and frequency domain expression for the transmitted signal. Also, plot the magnitude of the frequency domain representation of the signal. b) On the receiver end, we demodulate the received signal by multiplying with 2cos(Wet +Au). Derive the expression of the demodulated signal in the time domain, before low-pass filtering. c) Derive the Fourier Transform of the demodulated signal.

Answer 1

shifter spectrum-ITAM (t) tw) 2 2 that We 2. -每

agrwtistetuole plot 2 Demodalated Sianal 叶m wet)s lw c. 2 1 2 sAw 2 2-