对一个2PSK数字通信系统运用MATLAB编程实现2PSK调制解调过程，输出调制解调后的相应波形，讨论其调制和解调效果，并用相关优化函数优化系统性能。-The modulation and demodulation of a 2PSK digital communication system is realized by using MATLAB programming. The corresponding waveforms of the output modulation and demodulation are discussed, and the modulation and demodulation effect are discussed.