Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2007-02-13
2007-02-13
Ha, Dac (Department: 2634)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S346000, C375S229000, C375S231000
Reexamination Certificate
active
10101505
ABSTRACT:
Error contributions in a DMT system where a received DMT-signal is effected by intersymbol interference, intercarrier interference and additive noise are minimized. Intersymbol interference average power, intercarrier interference average power, and additive noise average power are calculated. A cost function is determined by adding the intersymbol interference average power, the intercarrier interference average power, and the additive noise average power. A constraint is introduced which avoids a trivial solution where a time domain equalizer (TEQ) vector is equal to zero. The cost function is minimized by optimizing the TEQ vector.
REFERENCES:
patent: 5285474 (1994-02-01), Chow et al.
patent: 6882619 (2005-04-01), Gerakoulis
patent: 2002/0131537 (2002-09-01), Storm et al.
patent: 0 838 928 (1998-04-01), None
patent: 0 913 973 (1999-05-01), None
patent: 2 330 499 (1999-04-01), None
Acker et al.; “Improved Time Domain Equalization for ADSL”.
IEEE Transactions on Communications, vol. 44, No. 1, 1996, pp. 56-64, XP000549644, New York, USA, ISSN: 0090-6778, Naofal Al-Dhahir et al., “Optimum Finite-Length Equalization for Multicarrier Transceivers”.
IEEE, Communication Theory Mini-Conference, Singapore, Nov. 14-16, 1995, New York, US, pp. 172-176, XP000773406, ISBN: 0-7803-2510-9, B. Farhang-Boroujeny, “Channel Memory Truncation for Maximum Likelihood Sequence Estimation”.
Conference Record of Thirtieth Asilomar Conference on Signals, Systems and Computers, (Cat. No. 96CB36004), Nov. 2-6, 1996, pp. 669-673, vol. 1, XP002173279, IEEE Comput. Soc. Press, Los Alamitos, CA, USA, ISBN: 0-8186-7646-9, Mark Webster et al., “Adaptive Channel Truncation for FFT Detection in DMT Systems—Error Component Partioning”.
IEEE Global Telecommunications Conference(GLOBECOM), US, New York, IEEE, Nov. 14, 1995, pp. 2069-2074, XP000633651, ISBN: 0-7803-2510-9, E. Viterbo et al., “How to combat long echoes in OFDM transmission schemes: Sub-channel equalization or more powerful channel coding”.
Baldemair Robert
Frenger P{dot over (a)}l
Ha Dac
Joseph Jaison
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (Publ)
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