Homework 12
Reading
 Chapter 3 in the Anderson text
Problems

Consider the 4QASK Yconstellation described
bits symbol 0 0 1 0 0 1 1 1  Sketch the constellation.
 Compute the average symbol energy in terms of .
 Determine the value of so that the average symbol energy is .
 Sketch the decision region boundaries for this constellation.

Assuming a unitenergy NRZ pulse, the basis functions are

Determine the estimated bit sequence for the following sampled
matched filter outputs:

Suppose the ML receiver uses a bank of filters matched to the
signal pulses
and
and that the
matched filter outputs are:
 What is the probability of making a symbol error? Express your answer in terms of .
 How does this constellation compare with QPSK in terms of probability of symbol error and bandwidth?
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