Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1991-12-20
1993-12-07
Kuntz, Curtis
Pulse or digital communications
Spread spectrum
Direct sequence
328 55, 369 60, H04L 704
Patent
active
052689352
ABSTRACT:
Improved jitter performance is realized in a desynchronizer for obtaining an asynchronous digital signal, e.g., a DS3 signal, from a received synchronous digital signal, e.g., a SONET STS-1 signal. The improved jitter performance results from the use of a unique dynamic bit leaking arrangement in conjunction with a digital phase locked loop and desynchronizing elastic store. An optimum bit leak interval is obtained by controllably leaking a greater number of shorter interval STS-1 bits than the number of received pointer adjustment bits. Additionally, the affect of random pointer adjustments and the superposition of randomly received pointer adjustments on a periodic sequence of received pointer adjustments is minimized by employing a "static" queue of pointer adjustment bits to be leaked. The queue is dynamically maintained at its "static" count so that there are always bits in the queue to be leaked at the desired optimum bit leak interval even in the presence of randomly received pointer adjustments.
REFERENCES:
patent: 4791652 (1988-12-01), McEachem et al.
patent: 4847875 (1989-07-01), Choi
patent: 4928275 (1990-05-01), Moore et al.
patent: 4996698 (1991-02-01), Nelson
patent: 5052025 (1991-09-01), Duff et al.
patent: 5052031 (1999-09-01), Molloy
patent: 5119406 (1992-06-01), Kramer
patent: 5131013 (1992-07-01), Choi
"A Synchronous Desynchronizer" Contribution to T1 Standards Project, T1X1.6/88-026 Sabit Say, Bellcore-Jul. 25, 1988.
"Design and proformance Verification of Sonet to D53-Desynchronizer" Globe-Comm Conference Record, vol. 2 pp. 761-764 Dec. 2-5, 1991.
Pending U.S. Patent Application Ser. No. 07/727,033, filed Ju. 8, 1991.
Contribution to T1 Standards Project, T1X1.6/89-012, "Sonet Desynchronizers," Andy Reid, British Telecom. Feb. 8, 1989.
Mediavilla Ricardo
Molloy Nicholas J.
AT&T Bell Laboratories
Ghebretinsae T.
Kuntz Curtis
Stafford Thomas
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