包含了QPSK、OQPSK调制，QAM调制，以及16QAM调制通信系统仿真，采用格雷码，升余弦滤波，高斯信道-Includes QPSK, OQPSK modulation, QAM modulation, and 16QAM modulation communications system simulation, using Gray code, raised cosine filtering, Gaussian channel

QPSK经格雷码优化后过调制解调后的误码率误信率判决-After QPSK Gray code optimization via modem error rate over the mistaken belief that the rate of post-judgment

信号经过格雷码编码之后qpsk传输，研究信噪比。-After Gray coded signal transmission qpsk, research SNR.