Method for frame synchronization of an exchange of a PCM time mu

Details Method for frame synchronization of an exchange of a PCM time mu Method for frame synchronization of an exchange of a PCM time mu

1987-09-22

1989-09-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370105, H04J 306

Patent

active

048645656

ABSTRACT:
A frame start word derived by superframe formation is found by testing for the presence of a correct binary value combination each bit position in a time window having the length of as many bits as framing bits are spaced apart, with the inclusion of so many overframes that a decision can be reached on the possibility of a relationsip to the frame start word. If this is to be excluded the corresponding bit position is flagged and thereafter no longer taken into consideration. Otherwise, the next binary value of the corresponding bit position is inferred from the binary value present. The procedure is continued, always including the same number of overframes until only one unflagged bit position remains.

REFERENCES:
patent: 4125745 (1978-11-01), Steidl
patent: 4467469 (1984-08-01), Krikor
patent: 4507780 (1985-03-01), Perry
patent: 4531210 (1985-07-01), Perry
patent: 4797678 (1989-01-01), Tsuji et al.

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