matlab_assign_4

matlab_assign_4 - ECE 561 Digital Communications Systems...

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ECE 561 – Digital Communications Systems MATLAB Assignment #4 Part 1. Create a Simulink model that will generate a raised cosine waveform for a binary data stream. a. Generate a waveform for 20 randomly generated bipolar binary values with a data rate of 10Kbps. Plot both the original binary data and the raised cosine waveform. Assume that the rolloff factor r = 1. b. Plot the spectrum of the raised cosine pulse with a rolloff factor of 1. Compare your results to the theoretical bandwidth. Run the simulation long enough so that the spectrum (and bandwidth) is displayed clearly. c. Repeat a and b for r = 0.5. Part 2. Create a Simulink model that will generate a “modified” duobinary pulse of the form: p DB ( t ) = A sinc t T A sinc t 2 T T Note that the second sinc pulse is delayed by two bit durations and that it is subtracted rather than added, as it was for the duobinary pulse. a.
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This document was uploaded on 02/27/2010.

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matlab_assign_4 - ECE 561 Digital Communications Systems...

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