In Section 8.3, we discussed the use of sinusoidal modulation for frequency division mul...

In Section 8.3, we discussed the use of sinusoidal modulation for frequency division multiplexing whereby several signals are shifted into different frequency bands and then summed for simultaneous transmission. In the current problem, we explore another multiplexing concept referred to as quadrature multiplexing. In this multiplexing procedure, two signals can be transmitted simultaneously in the same frequency band if the two carrier signals are out of phase. The multiplexing system is shown in Figure P8.40(a) and the demultiplexing system in Figure P8.40(b) are both assumed to be band limited with maximum frequency so that . The carrier frequency w, is assumed to be greater than . Show that