Word identification and synchronization with the 3T4B line code

The author describes the word identification and synchronization capabilities of a new line code called 3T4B. This code is suitable for a medium-speed digital transmission system of more than 1 Mb/s, including optical link. Two versions of the 3T4B line code are presented. In comparison with 1T2B codes, these transcoding formats make it possible to decrease the transmission speed but require more complicated logics. These pulse formats satisfy all conditions required for digital transmission on optical fiber. The good synchronization performance of the proposed versions of the new code is shown