Spectrally constrained impulse shortening filter for a...

Details Spectrally constrained impulse shortening filter for a... Spectrally constrained impulse shortening filter for a...

2007-06-07

2008-09-30

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

07430242

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: 5909465 (1999-06-01), Bottomley et al.
patent: 6018317 (2000-01-01), Dogan 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: 6631175 (2003-10-01), Harikumar et al.
patent: 7254178 (2007-08-01), Harikumar 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.

Affiliated with

Also associated with

Rating

Spectrally constrained impulse shortening filter for a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spectrally constrained impulse shortening filter for a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrally constrained impulse shortening filter for a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3984424