Asynchronous Multiplexing in Terms of Hunting-Free Reframing

摘要

Application of multipled block codes (MBC) for realizing asynchronous multiplexing in terms of hunting-free reframing is investigated. First, the principles of MBC are overviewed to show the capability of filterless clock recovery. Then it is shown that modification of simple frame structure of MBC line code can be used for attaining hunting-free reframing for multiplexing systems. Two types of MBCs are illustrated. While the one uses header blocks for hunting-free reframing, the other uses no headers. Finally, after the overview of systematic design methods for hunting-free reframing, it is shown that variable frame lengths can be accommodated by MBCs with header type framing blocks. Several types of formats for asynchronous multiplexing are investigated.