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Using MatLab, Simulate BPSK, QPSK, QAM16, QAM64 and StarQAM16 and plot the SER vs SNR curves on the same axes. For each modulation scheme the

Using MatLab, Simulate BPSK, QPSK, QAM16, QAM64 and StarQAM16 and plot the SER vs SNR curves on the same axes. For each modulation scheme the SER rapidly reduces at a particular SNR. Why does this occur? Why does the transition SNR vary between modulation schemes?

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