3. (10 pts) Consider the standard square 25-QAM signal constellation. We can form another constellation with 25 points b

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3 10 Pts Consider The Standard Square 25 Qam Signal Constellation We Can Form Another Constellation With 25 Points B 1 (39.81 KiB) Viewed 37 times

3. (10 pts) Consider the standard square 25-QAM signal constellation. We can form another constellation with 25 points by taking the union of the standard square 16-QAM and 9-QAM constellations. (a) (4 pts) Sketch the upper right quadrant for each constellation. I.e., plot the points ï in the constellation with Re[x] ≥ 0 and Im[x] ≥ 0. (b) (6 pts) Which constellation has better power efficiency? (You can answer this by computing the power efficiencies in each case, but there is an easier way. If you do decide to compute the efficiencies, it is possible to avoid large sums.)