说明：  MQAM调制方式 本文主要介绍了正交幅度调制(QAM)调制和解调的原理和实现，MQAM与OFDM，MPSK的性能比较，以及MQAM在有扰信道下的性能及其改进方法：信道编码和频域均衡。并在已知特性的通信信道上进行仿
(MQAM modulation This paper mainly introduces the quadrature amplitude modulation (QAM) modulation and demodulation principle and realize, MQAM with OFDM, MPSK Performance Comparison, as well as MQAM in Scrambling channel performance and its improvement: channel coding and frequency domain balanced. And characteristics of the communication channel known for imitation)