Systematic design of frame patterns for hunting-free reframing

An application of multiple block codes (MBC) for realizing new digital transmission schemes that features in 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 the simple frame structure of MBC line code can be used for attaining hunting-free refraining for multiplexing systems. Two types of MBC are developed to this end. While the one uses header blocks for hunting-free refraining, the other uses no headers. Finally, systematic design of MBC format for hunting-free refraining is investigated. It is shown that variable frame lengths can be accommodated by MBC with header type framing blocks