HW5 - ECEN 661 - Modulation Theory Homework #5 Assignment...

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ECEN 661 - Modulation Theory Homework #5 Assignment Date: 2/25/08 Due Date: 3/3/08 1. (Text 5-4, 4th edition - modified) A binary digital communication system employs the signals , , , . This is called on-off keying (OOK). The demodulators creates the decision statistic , where is the received signal. It then compares this number with a threshold to determine which signal was sent. (a) Determine the optimum decision threshold assuming the two waveforms are equally likely to be sent. (b) Determine the probability of error as a function of . How does OOK compare with antipodal signalling? 2. (Text 5.11, 4th edition) The two equivalent low-pass signals shown in the figure are used to transmit a binary information sequence. The trans- mitted signals, which are equally probable, are corrupted by additive zer- mean Gaussian white noise having an equivalent low-pass representation, , with an autocorrelation function . (a) What is the average transmitted signal energy per bit, .
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HW5 - ECEN 661 - Modulation Theory Homework #5 Assignment...

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