QPSK 调至，基于BPSK的算法进行改进，实现了四项位调制，比原有调至方式更加准确无误-QPSK adjusted to improve the BPSK-based algorithm, to achieve the four bit modulation, and more accurate than the original adjusted

信号在高斯信道下的仿真，本人自己编的，已经经过验证是正确的-The simulation signal under the Gauss channel, I own, has been verified to be correct

本程序是QPSK信号在瑞利衰落信道下的仿真，已经过本人验证，适合初学者-This procedure is QPSK signal simulation in Rayleigh fading channel, I have been verified, suitable for beginners