Telephonic communications – Transmission line conditioning – Interference suppression
Reexamination Certificate
2006-04-25
2006-04-25
Tieu, Binh K. (Department: 2643)
Telephonic communications
Transmission line conditioning
Interference suppression
C379S392010, C379S416000, C379S001030, C370S201000, C370S298000, C375S222000, C375S227000
Reexamination Certificate
active
07035400
ABSTRACT:
An improved system and method for communicating information on a transmission medium is disclosed. The disclosed system and method provide improved communications on the transmission medium in the presence of interference, which may take the form of uncorrelated interference from different services on neighboring transmission mediums. In one embodiment, the communications system includes a subscriber modem, a central office modem; and a communications channel coupled between the subscriber modem and the central office modem. The communications channel transports uplink signals from the subscriber modem to the central office modem, and downlink signals from the central office modem to the subscriber modem. At frequencies below a selected frequency ME2F, the power spectral density of the transmitted uplink signals is proportional to the power spectral density of the transmitted downlink signals by a positive scale factor, and at frequencies above ME2F, the power spectral density of the uplink signals is limited to one or more uplink frequency bands and the power spectral density of the downlink signals is limited to one or more downlink frequency bands that are disjoint from the uplink frequency bands. Preferably, the total bandwidth of the uplink frequency bands above ME2Fis proportional to the total bandwidth of the downlink frequency bands above ME2Fby the same positive scale factor.
REFERENCES:
patent: 4450555 (1984-05-01), Pays
patent: 4870657 (1989-09-01), Bergmans et al.
patent: 5063351 (1991-11-01), Goldthorp et al.
patent: 5181198 (1993-01-01), Lechleider
patent: 5479447 (1995-12-01), Chow et al.
patent: 5519731 (1996-05-01), Cioffi
patent: 5561686 (1996-10-01), Kobayashi et al.
patent: 5668802 (1997-09-01), Chalmers et al.
patent: 5673290 (1997-09-01), Cioffi
patent: 5781541 (1998-07-01), Schneider
patent: 5887032 (1999-03-01), Cioffi
patent: 5953700 (1999-09-01), Kanevsky et al.
patent: 6055297 (2000-04-01), Terry
patent: 6061427 (2000-05-01), Ryoo
patent: 6069922 (2000-05-01), Dyke
patent: 6101172 (2000-08-01), van Bavel et al.
patent: 6226356 (2001-05-01), Brown
patent: 6246716 (2001-06-01), Schneider
patent: 6292559 (2001-09-01), Gaikwad et al.
patent: 6317495 (2001-11-01), Gaikwad et al.
patent: 6330462 (2001-12-01), Chen
patent: 6339613 (2002-01-01), Terry
patent: 6549512 (2003-04-01), Wu et al.
patent: 6549520 (2003-04-01), Gross et al.
patent: 6647058 (2003-11-01), Bremer et al.
patent: 6658010 (2003-12-01), Enns et al.
patent: 6839429 (2005-01-01), Gaikwad et al.
patent: WO 98/34351 (1998-01-01), None
patent: 98/27154 (1998-12-01), None
patent: WO 99/33215 (1998-12-01), None
Spectral Optimization And Joint Signaling Techniques For Communication In The Presence Of Crosstalk,U.S. Appl. No. 09/107,975, filed Jun. 30, 1998.
Spectral Optimization And Joint Signaling Techniques With Upstream/Downstream Separation For Communication In the Presence Of Crosstalk,U.S. Appl. No. 09/145,349, filed Sep. 1, 1998.
Spectral Optimization And Joint Signaling Techniques With Multi-Line Separation For Communication In The Presence of Crosstalk,U.S. Appl. No. 09/144,934, filed Sep. 1, 1998.
Spectral Optimization For Communication In The Presence Of Crosstalk Under A Peak Frequency-Domain Power Constraint And With Optimally Grouped Spectral Bands,U.S. Appl. No. 09/266,413, filed Mar. 10, 1999.
Architecture and performance simulation of single pairH, W. Y. Chen, Converging Technologies for Tomorrow's Applications, 1996 IEEE Inter Conference, vol. 3, pp. 1421-1425.
Evaluation of Near-End Crosstalk Noise Affecting ADSL Systems,M. Carbonelli et al, Singapore ICCS Conference 1994, 0-7803-2046-8/94 1994 IEEE, pp. 630-634.
Joint Signaling Strategies for Approaching the Capacity of Twisted-Pair Channels,A. Sendonaris et al., IEEE Transactions On Communications, vol. 46, No. 5 May 1998, pp. 673-685.
Joint Signaling Strategies for Maximizing the Capacity of Twisted Pair Loops,A Sendonaris et al., (10 p.).
Performance and Spectral Compatibility of MONET-PAM HDSL2 with Ideal Transmit Spectra—Preliminary Results,McCaslin et al., T1E1.4/97-307, Sep. 1997, pp. 1-5.
A Proposal for DHSL2 Transmission: OPTIS,Rude et al., T1E1.4/97-238, Jun. 1997, pp. 1-3.
OPTIS Performance and Spectral Compatibility,Rude et al., T1E1.4/97-239, Jun. 1997, pp. 1-4.
Performance and Spectral Compatibility of MONET(R1)HDSL2 with Ideal Transmit Spectra—Preliminary Results,McCaslin et al., T1E1.4/97-412, Dec. 1997, pp. 1-6.
Updated OPTIS PSD Mask and Power Specification for HDSL2,Girardeau et al., T1E1.4/97-435, Dec. 1997, pp. 1-6.
Multicarrier Modulation for Data Transmission: An Idea Whose Time Has Come,Bingham, IEEE Communications Magazine, May 1990, pp. 5-15.
Full-Duplex 2B1Q Single-Pair HDSL Performance and Spectral Compatibility,Kerpez, T1E1.4/95-127, Nov. 1995, pp. 1-8.
Normative Text for Spectral Compatibility Evaluations,Zimmerman, T1E1.4/97-180R1, Jun. 1997, pp. 1-10.
Optimization of Discrete Multitone to Maintain Spectrum Compatibility with Other Transmission Systems on Twisted Copper Pairs,Barton et al., IEEE Journal on Selected Areas in Communications, vol. 13, No. 9, Dec. 1995, pp. 1558-1563.
Near-End Crosstalk is Almost Gaussian,Kerpez, IEEE Transactions on Communications, vol. 41, No. 1, Jan. 1993, pp. 670-672.
The Multitone Channel,Kalet, IEEE Transactions on Communications, vol. 37, No. 2, Feb. 1989, pp. 119-124.
Achievable Information Rates on Digital Subscriber Loops: Limiting Information Rates with Crosstalk Noise,Aslanis, Jr., et al., IEEE Transactions on Communications, vol. 40, No. 2 Feb. 1992, pp. 361-372.
A Practical Discrete Multitone Transceiver Loading Algorithm for Data Transmission over Spectrally Shaped Channels,Chow et al., IEEE Transactions on Communications, vol. 43, No. 2/3/4, Feb./Mar./Apr. 1995, pp. 773-775.
On the Capacity of a Twisted-Wire Pair: Gaussian Model,Kalet et al., IEEE Transactions on Communications, vol. 38, No. 3, Mar. 1990, pp. 379-383.
The HDSL' Environment,Werner, IEEE Journal on Selected Areas in Communications, vol. 9, No. 6, Aug. 1991, pp. 785-800.
Digital Communication, Second Edition,Lee et al., Kluwer Academic Publishers 1994, pp. 489-491.
Performance and Spectral Capability of OPTIS HDSL2,Zimmerman, T1E1.4/97-237, Jun. 1997, pp. 1-7.
Performance Evaluation of OPTIS for HDSL2,Takatori et al., T1E1.4/97-240, Jun. 1997, pp. 1-4.
Baraniuk Richard G.
Gaikwad Rohit V.
Conley & Rose, P.C.
Tieu Binh K.
Wm. Marsh Rice University
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