实现QPSK调制,很好的显示了调制后的波形，且可通过改变相应参数来变换图形-Realize QPSK modulation, good show the modulated waveform, and by changing the corresponding parameter to transform graphics

QPSK调制后产生QPSK信号，QPSK信号分别通过AWGN信道、Rayleigh衰减信道和Rician衰减信道，分别通过QPSK解调出数字信号，通过输入与输出数字信号的对比计算出仿真过程中的传输误比率，并将其与各衰减信道的理论误比率进行对比-Generate QPSK signal QPSK modulation, QPSK signals through AWGN channel, Rayleigh fading channel and Rician fading channel, resp

4-QAM,8PSK,QAM,QPSK +AWGN : Ps-Es/N0 and Pb-Eb/N0 We can plot 2 fig. to show that the 4 modulation situation-4-QAM,8PSK,QAM,QPSK +AWGN : Ps-Es/N0 and Pb-Eb/N0 We can plot 2 fig. to show that the 4 modulation situation