Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-01-03
2006-01-03
Tran, Khai (Department: 2637)
Pulse or digital communications
Receivers
Interference or noise reduction
Reexamination Certificate
active
06983030
ABSTRACT:
An approach for processing data received from a communications channel in finite precision arithmetic applications generally involves equalizing received data in the time domain prior to demodulation using finite impulse response (FIR) filtering. FIR coefficients used in FIR filtering are selected to minimize SNR degradation attributable to ISI and roundoff errors due to finite precision arithmetic, thereby maximizing channel capacity. The approach considers the communications channel noise attributable to crosstalk, white noise and analog to digital converter quantization noise, ISI attributable to failure of the equalizer coefficients to completely eliminate ISI, round off noise due to the use of finite precision arithmetic in the equalizer and roundoff noise due to the use of finite precision arithmetic in the FFT algorithm.
REFERENCES:
patent: 4179696 (1979-12-01), Quesinberry et al.
patent: 5068873 (1991-11-01), Murakami
patent: 5111481 (1992-05-01), Chen et al.
patent: 5432816 (1995-07-01), Gozzo
patent: 5432821 (1995-07-01), Polydoros et al.
patent: 5703903 (1997-12-01), Blanchard et al.
patent: 5715280 (1998-02-01), Sandberg et al.
patent: 5926455 (1999-07-01), Allpress
patent: 6295326 (2001-09-01), Tonissen et al.
patent: 6388513 (2002-05-01), Wright et al.
patent: 6788752 (2004-09-01), Andre
patent: 2002/0001355 (2002-01-01), Tore
patent: 2002/0044014 (2002-04-01), Wright et al.
patent: 2002/0131537 (2002-09-01), Storm et al.
patent: 0 795 985 (1997-09-01), None
patent: 0 912 023 (1999-04-01), None
patent: 1 043 875 (2000-10-01), None
patent: WO 97/40587 (1997-10-01), None
patent: WO 98/59450 (1998-12-01), None
patent: WO 00/54472 (2000-09-01), None
Melsa, P., et al., “Impulse Response Shortening for Discrete Multitone Transceivers”, IEEE Transactions on Communications, vol. 44, No. 12, Dec. 1996.
Al-Dhahir, N., et al., “Optimum Finite-Length Equalization for Multicarrier Transceivers”, IEEE Transactions on Communications, vol. 44, No. 1, Jan. 1996.
Chow, J., et al., “A Discrete Multitone Transceiver System for HDSL Applications”, IEEE Journal on Selected Areas in Communications, vol. 9, No. 6, Aug. 1991.
Bellanger, M. G., “Adaptive Digital Filters and Signal Analysis”, 1987, XP002169514, pp. 4-12 and 179-183.
Dalle Mese, et al., “Fixed-Lag Smoother for Digital Channel Equalisation”, Electronic Letters, IEE Stevenage, vol. 13, No. 12, Jun. 9, 1977, p. 366-367, XP0000761143, ISSN: 0013-5194.
Chen, W. Y., “DSL: Simulation Techniques and Standards Development for Digital Subscriber Line Systems”, 1988, XP002169513, pp. 8, 9, 11, 149-159.
Van Bladel, Mark and Moeneclaey, Marc, “Time-domain Equalization for Multicarrier Communication,” IEEE Global Telecommunications Conference, Nov. 14, 1995, pp. 167-171.
Lashkarian, Navid and Kiaei, Sayfe, “Fast Algorithm for Finite-Length MMSE Equalizers with Application to Discrete Multitone Systems,” IEEE International Conference on Acoustics, Speech, and Signal Processing, Mar. 15, 1999, pp. 2753-2756.
Skafidas Efstratios
Storm Andrew
Tonissen Shane Michael
Bandspeed, Inc.
Becker Edward A.
Hickman Palermo & Truong & Becker LLP
Tran Khai
LandOfFree
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