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M
(In this paper, the principle and implementation of quadrature amplitude modulation (QAM) modulation and demodulation are introduced, and the performance comparison between QAM and OFDM,MPSK is introduced, as well as M)