Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
Reexamination Certificate
2007-07-03
2007-07-03
Pham, Chi (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via frequency channels
C370S509000, C370S516000
Reexamination Certificate
active
09755339
ABSTRACT:
A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit transmitter generates a master carrier and a master clock signal which are used to transmit downstream data to the remote units. The remote units recover the master carrier and master clock and synchronize local oscillators in each remote unit to these master carrier and master clock signals to generate reference carrier and clock signals for use by the remote unit receiver. These reference carrier and clock signals are also used by the remote unit transmitters to transmit upstream data to the central unit. The central unit receiver detects the phase difference between the reference carrier and clock signals from the remote units periodically and adjusts the phase of the master carrier and master clock signals for use by the central unit receiver to receive the upstream data.
REFERENCES:
patent: 4218654 (1980-08-01), Ogawa et al.
patent: 4460992 (1984-07-01), Gutleber
patent: 4470138 (1984-09-01), Gutleber
patent: 4475208 (1984-10-01), Ricketts
patent: 4553161 (1985-11-01), Citta
patent: 4554579 (1985-11-01), Citta
patent: 4587662 (1986-05-01), Langewellpott
patent: 4635274 (1987-01-01), Kubota et al.
patent: 4688210 (1987-08-01), Eizenhofer et al.
patent: 4723164 (1988-02-01), Nienaber
patent: 4748681 (1988-05-01), Schmidt
patent: 4757460 (1988-07-01), Bione et al.
patent: 4773066 (1988-09-01), Kirkman
patent: 4811365 (1989-03-01), Manno
patent: 4829569 (1989-05-01), Seth-Smith et al.
patent: 4894789 (1990-01-01), Yee
patent: 4912721 (1990-03-01), Pidgeon, Jr. et al.
patent: 4926130 (1990-05-01), Weaver
patent: 4933930 (1990-06-01), Lien et al.
patent: 5072445 (1991-12-01), Nawata
patent: 5090024 (1992-02-01), Vander Mey et al.
patent: 5093718 (1992-03-01), Hoarty et al.
patent: 5130983 (1992-07-01), Heffner, III
patent: 5133079 (1992-07-01), Ballantyne et al.
patent: 5157686 (1992-10-01), Omura et al.
patent: 5164958 (1992-11-01), Omura
patent: 5166952 (1992-11-01), Omura et al.
patent: 5193094 (1993-03-01), Viterbi
patent: 5195092 (1993-03-01), Wilson et al.
patent: 5200993 (1993-04-01), Wheeler et al.
patent: 5214656 (1993-05-01), Chung et al.
patent: 5224122 (1993-06-01), Bruckert
patent: 5229996 (1993-07-01), Backstrom et al.
patent: 5231664 (1993-07-01), Bestler et al.
patent: 5233630 (1993-08-01), Wolf
patent: 5235615 (1993-08-01), Omura
patent: 5235619 (1993-08-01), Beyers, II et al.
patent: 5239557 (1993-08-01), Dent
patent: 5247347 (1993-09-01), Litteral et al.
patent: 5253268 (1993-10-01), Omura et al.
patent: 5280472 (1994-01-01), Gilhousen et al.
patent: 5289501 (1994-02-01), Seshadri et al.
patent: 5295152 (1994-03-01), Gudmundson et al.
patent: 5297162 (1994-03-01), Lee et al.
patent: 5305308 (1994-04-01), English et al.
patent: 5305352 (1994-04-01), Calderbank et al.
patent: 5309474 (1994-05-01), Gilhousen et al.
patent: 5313454 (1994-05-01), Bustini et al.
patent: 5319634 (1994-06-01), Bartholomew et al.
patent: 5325394 (1994-06-01), Bruckert
patent: 5327455 (1994-07-01), De Gaudenzi et al.
patent: 5345439 (1994-09-01), Marston
patent: 5345472 (1994-09-01), Lee
patent: 5347304 (1994-09-01), Moura et al.
patent: 5353300 (1994-10-01), Lee et al.
patent: 5359624 (1994-10-01), Lee et al.
patent: 5363403 (1994-11-01), Schilling et al.
patent: 5363404 (1994-11-01), Kotzin et al.
patent: 5373288 (1994-12-01), Blahut
patent: 5373502 (1994-12-01), Turban
patent: 5390166 (1995-02-01), Rohani et al.
patent: 5394391 (1995-02-01), Chen et al.
patent: 5398258 (1995-03-01), Su et al.
patent: 5404570 (1995-04-01), Charas et al.
patent: 5408465 (1995-04-01), Gusella et al.
patent: 5414699 (1995-05-01), Lee
patent: 5416797 (1995-05-01), Gilhousen et al.
patent: 5418813 (1995-05-01), Schaffner et al.
patent: 5425027 (1995-06-01), Baran
patent: 5440585 (1995-08-01), Partridge, III
patent: 5442625 (1995-08-01), Gitlin et al.
patent: 5442627 (1995-08-01), Viterbi et al.
patent: 5442662 (1995-08-01), Fukasawa et al.
patent: 5442700 (1995-08-01), Snell et al.
patent: 5448555 (1995-09-01), Bremer et al.
patent: 5452328 (1995-09-01), Rice
patent: 5463660 (1995-10-01), Fukasawa et al.
patent: 5467342 (1995-11-01), Logston et al.
patent: 5481533 (1996-01-01), Honig et al.
patent: 5488412 (1996-01-01), Majeti et al.
patent: 5499236 (1996-03-01), Giallorenzi et al.
patent: 5511067 (1996-04-01), Miller
patent: 5512935 (1996-04-01), Majeti et al.
patent: 5533013 (1996-07-01), Leppanen
patent: 5534913 (1996-07-01), Majeti et al.
patent: 5539730 (1996-07-01), Dent
patent: 5550578 (1996-08-01), Hoarty et al.
patent: 5557316 (1996-09-01), Hoarty et al.
patent: 5572517 (1996-11-01), Safadi
patent: 5572528 (1996-11-01), Shuen
patent: 5583853 (1996-12-01), Giallorenzi et al.
patent: 5586121 (1996-12-01), Moura et al.
patent: 5594872 (1997-01-01), Kawano et al.
patent: 5608446 (1997-03-01), Carr et al.
patent: 5608728 (1997-03-01), Ulm et al.
patent: 5610911 (1997-03-01), Ishikawa et al.
patent: 5617410 (1997-04-01), Matsumoto
patent: 5619531 (1997-04-01), Taylor et al.
patent: 5712982 (1998-01-01), Marcel
patent: RE35774 (1998-04-01), Moura et al.
patent: 5737329 (1998-04-01), Horiguchi
patent: 5745484 (1998-04-01), Scott
patent: 5751739 (1998-05-01), Seshadri et al.
patent: 5761198 (1998-06-01), Kojima
patent: 5822359 (1998-10-01), Bruckert et al.
patent: 5828655 (1998-10-01), Moura et al.
patent: 5930235 (1999-07-01), Arai
patent: 0 767 544 (1997-04-01), None
patent: 1 130 919 (2002-04-01), None
patent: PCT/US95/04329 (1995-10-01), None
patent: PCT/US95/10899 (1996-03-01), None
Johansson A.L., et al., “Successive Interference Cancellation in Multiple Data Rate DS/CDMA Systems”,Proceedings of the Vehicular Technology Conference, US, New York, IEEE, vol. CONF. 45, Jul. 25, 1995, pp. 704-708.
Akihiro Kajiwara, et al., “Spread Spectrum Demodulator Using Block Signal Processing”,Proceedings of the International Conference on Communications, US, New York, IEEE, vol. 23, Jun. 1991, pp. 894-898.
Richard D.J. van Nee, “Timing Aspects of Synchronous CDMA,” pp. 439-443.
Ruxandra Lupas et al., “Linear Multiuser Detectors for Synchronous Code-Division Multiple-Access Channels,” Jan. 1989, pp. 123-136, vol. 35, No. 1, IEEE Transactions on Infromation Theory.
R. De Gaudenzi et al., “Performance Evaluation of Quasi-Synchronous Code Division Multiple Access (QS-CDMA) for Satellite Mobile Systems,” 1990, pp. 1800-1804, European Space Research and Technology Center, European Space Agency, Noordwijk, The Netherlands.
Hiroshi Kazama et al., “Semi-Autonomous Synchronization Among Base Stations for TDMA-TDD Communications Systems,” Jul. 1994, pp. 862-866, No. 7, 2334b IEICE Transactions on Communications, Tokyo, Japan.
Kazuhiko Seki et al., “A Wireless Multimedia Network on a Time Division Duplex CDMA/TDMA,” 1995, pp. 441-444, University of Victoria, Department of Electrical and Computer Engineering, Victoria, B.C., Canada.
Azenkot Yehuda
Rakib Selim Shlomo
Brown Thelen Reid
Brown Raysman & Steiner LLP
Pham Chi
Phan Tri H.
Terayon Communication Systems, Inc.
LandOfFree
Apparatus and method for receiving upstream data... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for receiving upstream data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for receiving upstream data... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3722051