Pulse or digital communications – Bandwidth reduction or expansion
Reexamination Certificate
2007-01-23
2007-01-23
Ha, Dac V. (Department: 2611)
Pulse or digital communications
Bandwidth reduction or expansion
C375S263000, C375S290000, C375S298000, C341S052000, C341S068000
Reexamination Certificate
active
11133097
ABSTRACT:
A transmitter of digital data includes a modulator with an input for a carrier signal and an input for a first stream of control symbols. The modulator modulates the carrier signal with a second stream of symbols produced by the modulator. Each symbol of the second stream has a value that corresponds to a sum of the present control symbol and the last K first symbols of the first stream. The integer K is greater than one.
REFERENCES:
patent: 3388330 (1968-06-01), Kretzmer
patent: 5311547 (1994-05-01), Wei
patent: 5543952 (1996-08-01), Yonenaga et al.
patent: 5867534 (1999-02-01), Price et al.
patent: 6366418 (2002-04-01), McEwen et al.
patent: 6426821 (2002-07-01), Price et al.
patent: 6744827 (2004-06-01), Vandenabeele et al.
patent: 6879645 (2005-04-01), Webber et al.
Howson, R.D.IEEE Trans Commun Technol, Com, “An Analysis of the Capabilities of Polybinary Data”, pp. 312-319, 1965.
Kretzmer, E.R.IEEE Communications Convention, “Binary Data Communication By Partial Response Tran”, pp. 451-455, 1965.
B. Skiar,Digital Communications Fundamental and Applications, Formatting and Baseband Transmission, pp. 51-116, 1988.
Ono T et al: “Characteristics of Optical Duobinary Signals in Terabit/S Capacity, High-Spectral Eficiency WDM Systems” Journal of Lightwave Technology, vol. 16, No. 5 (May 1998) pp. 788-797.
Wei, Fang-Lee: “Precoding Technique for Partial-Response Channels With Applications to HDTV Transmission” IEEE Journal on Selected Areas in Communications, vol. 11, No. 1 (1993) pp. 127-135.
Yonenaga K et al:Dispersion-Tolerant Optical Transmission System Using Duobinary Transmitter and Binary ReceiverJournal of Lightwave Technology, vol. 15, No. 8 (Aug. 1997) pp. 1530-1537.
Ha Dac V.
Lucent Technologies - Inc.
McCabe John F.
LandOfFree
Bandwidth-efficient modulation in communication systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bandwidth-efficient modulation in communication systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bandwidth-efficient modulation in communication systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3790261