这是一个基于system view的数字基带传输系统。构造了数字基带的系统模型，可以分析数字信源的频谱特性，还可以观察输出信号的眼图-This is the one based on the system. View digital baseband transmission system. Digital baseband system model is constructed to analyze the spectral characteristics of the digital source, you can also observe the eye diagram of the output signal