Analog-to-digital conversion controller, optical receiving...

Details Analog-to-digital conversion controller, optical receiving... Analog-to-digital conversion controller, optical receiving...

2008-02-04

2009-10-13

Nguyen, Linh V (Department: 2819)

Coded data generation or conversion

Converter compensation

C341S119000, C341S120000, C341S121000, C341S139000, C341S155000

Reexamination Certificate

active

07602322

ABSTRACT:
An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero (RZ) pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital (AD) converter. A control-value calculating unit subsequent to the AD converter digitally processes the digital signals, retrieves an absolute value of the digital signals or a value corresponding one-to-one with the absolute value of the digital signals, estimates errors from an appropriate timing of a sampling timing in the AD converter based on the absolute value of the digital signals or the value corresponding one-to-one with the absolute value of the digital signals, and calculates a control value controlling the sampling timing based on the estimated errors. Based on the control value, a phase of a pulse regulating the sampling timing of AD conversion can be compensated.

REFERENCES:
patent: 5671253 (1997-09-01), Stewart
patent: 5705949 (1998-01-01), Alelyunas et al.
patent: 5796358 (1998-08-01), Shih et al.
patent: 6198416 (2001-03-01), Velazquez
patent: 6438163 (2002-08-01), Raghavan et al.
patent: 6483447 (2002-11-01), Eglit
patent: 6621862 (2003-09-01), Dabell
patent: 6678319 (2004-01-01), Jamali
patent: 6795494 (2004-09-01), Phanse et al.
patent: 6941078 (2005-09-01), Onaka
patent: 7224911 (2007-05-01), Dai et al.
patent: 7330141 (2008-02-01), Temerinac et al.
patent: 7336729 (2008-02-01), Agazzi
patent: 2004/0120433 (2004-06-01), Duda et al.
patent: 2007/0223570 (2007-09-01), Goto
patent: 0 812 075 (1997-12-01), None
patent: 06-053906 (1994-02-01), None
patent: 8-163027 (1996-06-01), None
patent: 08-163027 (1996-06-01), None
patent: 2000-292263 (2000-10-01), None
patent: 2002-171203 (2002-06-01), None
patent: 2002-198906 (2002-07-01), None
patent: 2002-261692 (2002-09-01), None
patent: 2003-258606 (2003-09-01), None
patent: 2004-080701 (2004-03-01), None
patent: 2005-159553 (2005-06-01), None
patent: 2005/117285 (2005-12-01), None
patent: 2007/132503 (2007-11-01), None
patent: 2008-038337 (2008-04-01), None
Tanimura et al. U.S. Appl. No. 11/967,394, filed Dec. 31, 2007 “Analog-to-Digital conversion controller, optical Receiving Device, Optical Receiving Method, and Waveform-Distortion Compensating Device”.
Notice of Rejection for corresponding Japanese Application 2007-037184; mailed Jan. 27, 2009.
Dany Sebastien et al., “Unrepeated 210-km Transmission with Coherent Detection and Digital Signal Processing of 20-Gb/s QPSK Signal”, Optical Fiber Communication Conference & Exposition 2005. (3 pages).
Timo Pfau et al., “1.6 Gbit/s Real-Time Synchronous QPSK Transmission with Standard DFB Lasers”, European Conference on Optical Communication 2006. (2 pages).
“20 Msymbol/s, 64 and 128 QAM coherent optical transmission over 525 km using heterodyne detection with frequency-stabilised laser”; M. Nakazawa, M. Yoshida, K. Kasai, J. Hongou; vol. 42, No. 12, pp. 57-58; Jun. 8, 2006.
Bogoni et al.; “OTDM-based optical communications networks at 160 Gbit/sand beyond”; Dec. 9, 2006; Optical Fiber Technology, Academic Press, London, US; pp. 1-12.
Extended European Search Report for corresponding European Application 08000030.0-2206; mailed Jul. 28, 2008.
Partial European Search Report for corresponding European Application 08000030.0-2206.

Affiliated with

Also associated with

Rating

Analog-to-digital conversion controller, optical receiving... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Analog-to-digital conversion controller, optical receiving..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analog-to-digital conversion controller, optical receiving... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4112866