中文说明：通信的基本功能是传递信息，即由信源产生的信息，通过一定的媒介(即信道)传输，最后被信宿(收信暂)接收。基于MATLAB编码的数字通信系统设计，含调制、加性信道、解调系统等单元。实现已调信号的波形和功率谱密度函数
English Description：
Communication of the basic function is to transmit information, namely, the source of information, through a certain channel transmission media, the last being the destination (receiver temporarily) receiving. Design of digital communication system based on MATLAB code, including modulation, additive channel, demodulation system and so on. Waveform and power spectral density function of modulated signal is realized.