qpsk调制在awgn/rayleigh信道下的误码性能比较，以及信号的功率谱和星座图-QPSK modulation in awgn/Rayleigh Channel Performance Comparison of error, and the signal power spectrum and constellation
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powerspec QPSK_RAYLEIGH_draw.m QPSK_AWGN_draw.m ber QPSK_System_BER_Simulation.m cm_sm32.m cm_sm33.m
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