Monitoring unit for optical burst mode signals

Details Monitoring unit for optical burst mode signals Monitoring unit for optical burst mode signals

2006-04-18

2006-04-18

Payne, David C. (Department: 2638)

Optical communications

Transmitter and receiver system

Including synchronization

C398S154000, C398S202000, C398S210000

Reexamination Certificate

active

07031616

ABSTRACT:
The invention has for its object to provide a monitoring unit, particularly for optical burst mode signals in asynchronous optical networks based on, e.g., Internet or ATM (ATM=asynchronous transfer mode). The monitoring unit for burst mode signals comprises a detector for performing a Q-factor measurement in dependence on at least one variable and at least one fixed amplitude threshold value and on at lest one variable and at least one fixed phase value. This detector contains a burst mode amplitude detector for generating a fixed amplitude threshold value for each burst, a burst mode clock recovery circuit for generating a fixed phase value for each burst, a burst detector for detecting the beginning of each burst, and a control logic for generating a variable amplitude threshold value and a variable phase value for each burst.

REFERENCES:
patent: 5040194 (1991-08-01), Tjahjadi et al.
patent: 5365516 (1994-11-01), Jandrell
patent: 5585954 (1996-12-01), Taga et al.
patent: 5617237 (1997-04-01), Bogdan et al.
patent: 0999670 (2000-05-01), None
patent: WO 0120452 (2001-03-01), None

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