You need not derive your answer in detail it will

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Unformatted text preview: d Vth = V /2. 3. [4 points]: For M = 1, what is the corresponding BER now? (You need not derive your answer in detail; it will suffice to explain what modifications you need to make to the earlier BERbipol expression, and why.) BERonoff = 4. [4 points]: For a given M and noise variance, by what factor does V in on-off signaling have to be increased in order to get a BER that matches the case of bipolar signaling under the original V ? V must be increased by a factor of : 5. [2 points]: If V for on-off signaling is increased by the factor you determined in the preceding problem, by what factor does the average power at the transmitter increase? Average power at the transmitter increases by : Page 4 of 17 6.02 Fall 2012, Quiz 2 6. [3 points]: Suppose (for either bipolar or on-off signaling) the probability of a “1” being sent becomes greater than the probability of a “0” being sent. Will Vth have to be increased, decreased, or left unchanged from its previous value for optimum performance, i.e., minimum BER? Circle the correct answer, and e...
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This document was uploaded on 03/17/2014 for the course ELECTRICAL 6.02 at MIT.

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