说明：  产生2^5的二进制PRBS信号，编码成单极性NRZ,RZ信号并绘制出波形，把2^5的PRBS信息码编码成HDB3码和差分双向码并绘制出波形
(The binary PRBS signal generated by 2^5 is coded into unipolar NRZ, RZ signal, and the waveform is plotted. The PRBS information code of 2^5 is encoded into HDB3 code and differential bidirectional code, and the waveform is plotted)