Method for the reduction of phase noise introduced by the SDH ne

Details Method for the reduction of phase noise introduced by the SDH ne Method for the reduction of phase noise introduced by the SDH ne

1994-05-23

1998-06-30

Vo, Don N.

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375376, 375350, 370516, H04L 700, H04L 2536, H04L 2540

Patent

active

057745099

ABSTRACT:
A method and apparatus for reducing the phase noise introduced by pointer justification from a synchronous digital hierarchy network in a transmitted numerical signal. In the method and apparatus, occasional redundancies associated with bit justifications and fixed redundancies are combined with occasional prefiltered redundancies associated with the pointer justifications, and the combined signal is filtered in an analog phase locked loop. The occasional redundancies associated with the pointer justifications and at least part of the fixed redundancies with or without bit justifications are prefiltered in two stages, and the prefiltered signals are combined with the occasional redundancies associated with the bit justifications whenever these occasional redundancies are not prefiltered.

REFERENCES:
patent: 4370749 (1983-01-01), Levy et al.
patent: 4860319 (1989-08-01), Yoshida
patent: 5056054 (1991-10-01), Wong et al.
patent: 5195088 (1993-03-01), Urbansky
British Telecom Contribution to T1 Standards Project T1X1 6/89 012; 2 Feb. 1989 A. Reid, "Sonet Desynchronisers".
Electronics Letters vol. 26, No. 16, 2 Aug. 1990, Stevenage GB, pp. 1227-1228, R. Nawrocki et al.

Affiliated with

Also associated with

Rating

Method for the reduction of phase noise introduced by the SDH ne does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for the reduction of phase noise introduced by the SDH ne, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the reduction of phase noise introduced by the SDH ne will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1868251