In Problem 8.40, we introduced the concept of quadrature multiplexing, whereby two signa...

In Problem 8.40, we introduced the concept of quadrature multiplexing, whereby two signals are summed after each has been modulated with carrier signals of identical frequency, but with a phase difference of . The corresponding discrete-time multiplexer and demultiplexer are shown in Figure P8.41. The signals and are both assumed to be band limited with maximum frequency tom, so that