Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2007-08-07
2007-08-07
Vo, Don N. (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S350000
Reexamination Certificate
active
10608329
ABSTRACT:
A channel in a multiple carrier communication system is equalized by computing a target spectral response, shortening the impulse response of the channel so that a significant part of an energy of the impulse response is confined to a region that is shorter than a target length and filtering the signal based on the target spectral response.
REFERENCES:
patent: 5285474 (1994-02-01), Chow et al.
patent: 5521908 (1996-05-01), Younce et al.
patent: 6035000 (2000-03-01), Bingham
patent: 6047020 (2000-04-01), Hottinen
patent: 6069917 (2000-05-01), Werner et al.
patent: 6075816 (2000-06-01), Werner et al.
patent: 6097763 (2000-08-01), Djokovic et al.
patent: 0 768 778 (1997-04-01), None
patent: WO 93/26096 (1993-12-01), None
Melsa et al., Optimal Impulse Response Shortening, Proceedings of the Thirty-third Annual Allerton Conference on Communication, Control and Computing, pp. 431-439.
Chow et al., “A Cost-Effective Maximum Likelihood Receiver for Multicarrier Systems,” Proceedings of the Int'l Conference on Communication, 1992, pp. 333.7.1-333.7.5.
Worthen et al., Simulation of VDSL Test Loops, Technical Report T1E1.4/97-288, ANSI, 1997.
Harikumar et al., “Shortening the channel impulse response of VDSL loops for multicarrier applications,” Technical Report T1E1.4/97-289, ANSI 1997.
Harikumar et al., “Minimizing noise bleeding in DMT systems with a TEQ,” Technical Report T1E1.4/98-181, ANSI 1998.
Chow et al., A Discrete Multitone Transceiver System for HDSL Applications, IEEE Journal on Selected Areas in Communications, vol. 9, No. 6, Aug. 1991, pp. 895-908.
VDSL Alliance SDMT VDSL Draft Standard Proposal, Technical Report T1E1.4/98-172, ANSI 1998.
DMT Group VDSL PMD Draft Standard Proposal, Technical Report T1E1.4/96-32R2, ANSI 1997.
Very-high-speed Digital Subscriber Lines, Draft Technical Report-Revision 9, T1E1.4/97-131, ANSI 1997.
Cimini, Jr., Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing, IEEE Transactions on Communications, vol. COM-33, No. 7, Jul. 1985, pp. 665-675.
Peter J. W. Melsa et al.,Impulse Response Shortening for Discrete Multitone Transceivers, Dec. 1995, vol. 44, No. 12, IEEE Transactions on Communications.
Naofal Al-Dhahir,Joint Channel and Echo Impulse Response Shortening on Digital Subscriber Lines, Oct. 1996, vol. 3, No. 10, IEEE Signal Processing Letters.
D. D. Falconer et al.,Adaptive Channel Memory Truncation for Maximum Likelihood Sequence Estimation, Nov. 1973, vol. 52, No. 9, The Bell System Technical Journal.
International Preliminary Examination Report, Aug. 13, 1999.
Harikumar Gopal
Marchok Daniel
Fish & Richardson P.C.
Tellabs Operations Inc.
Vo Don N.
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