MATLAB simulation of the QPSK signal, respectively, the waveform for the roll-off waveform (carrier frequency 5Hz, the symbol rate for 1Baud) and the waveform is a rectangular wave (carrier frequency of 5Hz, the symbol rate for 1Baud) simulation of the formation of the two waveforms. And bit error rate performance curve, the constellation diagram.

QPSK\gen_rcos_qpsk.m
....\gen_rect_qpsk.m
....\QPSK1.m
....\QPSK1_2.m
....\QPSK2.m
....\QPSK3.m
QPSK

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