这个程序是有关通信系统的仿真，调制、解调、加噪、滤波以及统计误码率，和星座图的绘制，包含很多个独立的小函数以及一个主函数！-This program is a simulation of the communication system , modulation, demodulation , adding noise, filtering and statistical BER, and constellation mapping, contains many independent func

实现绘制信号的功率谱，两重自相关，滤波后时域，滤波器，频谱图，信号时域图以及自相关函数图等功能(The functions of drawing signal power spectrum, double correlation, filtering time domain, filter, spectrum, signal time domain and autocorrelation function diagram are realized.)