Digital communications synchronization scheme

Details Digital communications synchronization scheme Digital communications synchronization scheme

1990-11-30

1992-07-28

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 40, 375100, 34082501, 371 682, 455 8, H04K 110, H04L 102

Patent

active

051346338

ABSTRACT:
A synchronization scheme for use in digital communications systems selectively replaces data-representative symbols that would ordinarily be transmitted through a plurality of communications channels with associated replacement symbols that represent the data and provide a synchronization mechanism. In the receiver, the replacement symbols are detected and control circuitry which determines the difference in propagation delay between communications channels. Advantageously, this scheme can provide a determination of the propagation delay difference between communications channels while such channels are being used to transmit customer data and does not alter the timing or format of such data.

REFERENCES:
patent: 3253259 (1966-05-01), Jacoby
patent: 3990009 (1976-11-01), Lentz
patent: 4234956 (1980-11-01), Adderley et al.
patent: 4709278 (1987-11-01), Lagadec
patent: 4734920 (1988-03-01), Betts
patent: 4878228 (1989-10-01), Takahashi

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