说明：  数字通信调制信号信号模拟系统 信号种类： MASK：2ASK，4ASK，8ASK MPSK：2PSK、4PSK、8PSK MFSK：2FSK、4FSK、8FSK 分连续相位CPFSK和离散相位DPFSK两种 MQAM：16QAM、32QAM、64QAM、128QAM OFDM：子载波数可任意选定，映射方式有BPSK、QPSK、4QAM、16QAM、32QAM、64QAM
(Digital communication system signal-signal analog modulation signals Category: MASK: 2ASK, 4ASK, 8ASK MPSK: 2PSK, 4PSK, 8PSK MFSK: 2FSK, 4FSK, 8FSK sub-CPFSK continuous phase and discrete phase DPFSK two kinds of MQAM: 16QAM, 32QAM, 64QAM, 128QAM OFDM: the number of sub-carriers can be arbitrarily selected, and mapping methods are BPSK, QPSK, 4QAM, 16QAM, 32QAM, 64QAM)