线路编码方案(Line coding schemes) Unipolar NRZ Polar NRZ,RZ,and biphase(Manchester, and differential Manchester) Line coding Bipolar AMI and pseudoternary Multilevel 2B/1Q,8B/6T,and 4D-PAM5 Multitransition MLT-3 4.15 Figure 4.4 Line coding schemes 4.15 Figure 4.4 Line coding schemes 线路编码方案(Line coding schemes)