说明：  利用Matlab建立仿真系统，对HDB3编码原理进行仿真测试，要求对输入的二进制代码进行HDB3编码，画出解码波形与原波形。
(The simulation system is established by MATLAB, and the HDB3 coding principle is simulated and tested. The input binary code is required to be HDB3 coded, and the decoding waveform and the original waveform are drawn)