On Frame Synchronization of PCM Systems

A new strategy for frame synchronization of PCM muitlplex systems which use pulse stuffing (justification) is proposed. In devising this technique, the compatibility with existing CCITT systems was taken into consideration. Comparisons between the proposed strategy and the CCITT recommended system are made in terms of average holding time, average time for detection of synchronization loss, and average synchronization recovery time. The proposed strategy proved to be significantly better in total synchronization time without sacrificing its holding time capacity.