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Engineering · Electrical Engineering
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We want to transmit two sound signals, each with bandwidth 5 KHz over a channel operating in the range of (200KHz-220KHz) Draw the block diagram for the transmitter that uses amplitude modulation to multiplex these two signals. Specify the necessary carrier frequencies for the two baseband signals. Illustrate the spectrum of the signals before and after multiplexing (you can assume an arbitrary shape for the spectrum of the original sound signals, e.g. rectangular or triangular within its bandwidth, but use different shapes for the two signals) Draw the block diagram for the receiver to demultiplex the two signals and bring back each signal to its baseband. Specify the cut-off frequencies of any filter used. Illustrate the spectrum of the signals after each step in (c). a. b. c. d.

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