AMI/HDB3 Line Code

Bipolar and High Density Bipolar

Real-World Applications

E1 (2.048Mbps) and T1 (1.544Mbps) transmission lines in telecom core networks use HDB3 or AMI codes. These encodings have no DC component, making them ideal for transformer-coupled long-distance copper cable transmission.

Experiment Steps

1. AMI Rule: 1 uses alternating positive/negative pulses
2. HDB3: Replace 4 consecutive 0s with special code

Simulation Experiment