信号调制和解调的函数，用matlab实现。内涵两个函数：sig_modulation与sig_demodulation。可实现MPSK,MPAM，4QAM，16QAM,64QAM的调制与解调。每个函数只需输入 信息比特，调试方式和调制阶数，即可使用。-Function of signal modulation and demodulation using matlab. Connotation the two functions: sig_modulation, and sig_demodulation. MPSK, MPAM, 4QAM, 16QAM, 64QAM the modulation and demodulation. Each function is simply input information bits, the debug mode, and the modulation order can be used.