Pulse or digital communications – Miscellaneous
Patent
1992-05-29
1996-05-28
Chin, Stephen
Pulse or digital communications
Miscellaneous
375261, 375298, 375340, H04L 2300, H04L 512
Patent
active
055219497
ABSTRACT:
A synchronization scheme for bidirectional data applications where the customer supplies data for transmission at a rate which is customer controlled. In accordance with the present invention, in each transmission direction, the customer data is converted into data symbols in a predetermined constellation. In response to these data symbols, additional symbols are added. In the disclosed embodiment, the additional symbols added are symbols lying outside of the constellation and are not used to represent customer data. The additional symbols added raise the symbol rate in each transmission direction to one higher than that provided by the symbols representative of the customer data alone. This higher symbol rate in each transmission direction is preferably the same, or the higher symbol rate in one direction is related to the higher symbol rate in the other direction by a rational number. At each receiver, the additional symbols are removed and customer data is recovered from its representative data symbols.
REFERENCES:
patent: 3680051 (1972-07-01), Blessin et al.
patent: 3825899 (1974-07-01), Haeberle et al.
patent: 4224473 (1980-09-01), Kaul et al.
patent: 4644537 (1987-02-01), Gitlin et al.
patent: 4651320 (1987-03-01), Thapar
patent: 4941154 (1990-07-01), Wei
patent: 4993046 (1991-02-01), Saito et al.
patent: 5105443 (1992-04-01), Betts et al.
patent: 5134633 (1992-07-01), Werner
patent: 5173900 (1992-12-01), Miller et al.
patent: 5251236 (1993-10-01), Brehmer et al.
"An Asymmetric Encoding Scheme for Word Stuffing", 8010 Bell systems technical journal, Nov. 6, 1969, by M. M. Buchner, Jr., pp. 379-398.
"Synchronization of PCM Channels by the Method of Word Stuffing", IEEE Transactions on Communication Technology, vol. COM-16, No. 2, Apr. 1968, by S. Butman, pp. 252-253.
Huang Gang
Werner Jean-Jacques
AT&T Corp.
Bocure Tesfaldet
Brendzel Henry T.
Chin Stephen
Padnes David R.
LandOfFree
Synchronization scheme for digital communications systems transp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronization scheme for digital communications systems transp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronization scheme for digital communications systems transp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-793276