基于MATLAB的QPSK仿真（AWGN高斯信道和瑞利信道），包括系统框图、功率谱密度、星座图。另外还有一个当发生100个错误时的误码率，高斯信道和瑞利信道下仿真的误码率和误比特率与理论值对比。-MATLAB-based simulation of QPSK (AWGN Gaussian channel and Rayleigh channel), including system block diagram, the power spectral density, constellation diagrams. There is also a 100 error occurs when the bit error rate, and the Gaussian channel under Rayleigh channel simulation of BER and bit error rate compared with the theoretical value.