Group frame synchronization system

Details Group frame synchronization system Group frame synchronization system

1975-08-11

1977-01-18

Stewart, David L.

H04J 306

Patent

active

040041000

ABSTRACT:
A group frame synchronization system establishes the frame synchronization to a plurality of time-division multiplexed digital signals by the use of a common synchronization code pattern. The common synchronization code pattern and mutually time-shifted codes of identical pattern are respectively inserted at the transmitting end into vacant time slots of the respective digital signals. At the receiving end, the group frame synchronization signals are extracted and fed to an exclusive OR circuit whose output signal is applied to the group frame synchronization circuit.

REFERENCES:
patent: 3537069 (1970-10-01), Van de Houten
patent: 3571516 (1971-03-01), Ohyama
patent: 3736507 (1973-05-01), Wolejsza
patent: 3763318 (1973-10-01), Ross
patent: 3766316 (1973-10-01), Hoffman
patent: 3809817 (1974-05-01), Gill
patent: 3854011 (1974-12-01), Mallory
patent: 3883729 (1975-05-01), DE Cremiers

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