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_demodula

MPSK MQAM MPAM理论误码曲线对比-MPSK MQAM MPAM theoretical BER curve comparison

M-ary PAM BER performance through additive wight Gaussian noise

MPAM在瑞利衰落信道下误码率和误比特率分析-MPAM BER analysis in Rayleigh fading channels