Modulated jitter attenuation filter

Details Modulated jitter attenuation filter Modulated jitter attenuation filter

2007-01-03

2008-10-21

Tran, Khai (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C370S505000

Reexamination Certificate

active

07440533

ABSTRACT:
A system and modulation method are provided for reducing jitter in the mapping of information into Synchronous Payload Envelopes (SPEs), in a data tributary mapping system. The method comprises buffering data from a plurality of tributaries, and generating buffer-fill information responsive to the buffered data being written and read. The buffer-fill information is filtered, producing rate control information. The rate control information is modulated, and the modulated rate control information is used in controlling the mapping of buffered tributaries into a SPE. The rate control information can be modulated with periodic signals, such as a sine or square wave, and pseudorandom signals with an average value of about zero.

REFERENCES:
patent: 7023942 (2006-04-01), Roberts et al.
patent: 7227876 (2007-06-01), Cochran et al.
patent: 7369578 (2008-05-01), Roberts et al.

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