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Unformatted text preview: baseband. Specify the cut-off frequencies of any filter used. d. Illustrate the spectrum of the signals after each step in (c ). 2. For the same two signals as in Prob. (1), we now have to transmit them within a channel operating in the range of (200-210KHz). a. Draw the block diagram for the transmitter that uses quadrature amplitude modulation to multiplex these two signals. Specify the necessary carrier frequencies for the two baseband signals. b. Illustrate the spectrum of the signals before and after multiplexing c. Draw the block diagram for the receiver to demultiplex the two signals and bring back each signal to its baseband (through QAM demodulation). Specify the cut-off frequencies of any filter used. d. Illustrate the spectrum of the signals after each step in (c ). e. Which method of multiplexing (that in prob (1) vs. that in Prob. (2)) is more efficient in channel usage?...
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This note was uploaded on 01/22/2012 for the course EE 3414 taught by Professor Wang during the Spring '06 term at NYU Poly.
- Spring '06