Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2003-12-22
2008-07-29
Nguyen, Lee (Department: 2618)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C342S367000
Reexamination Certificate
active
07406336
ABSTRACT:
The present invention relates to beamforming in a multi-carrier multi-user communication system applying an adaptive method for determining transmit weights for the various antenna beams. A set of complex transmission weights is adapted in response to appropriate feedback information on transmission quality from receiving units in order to achieve a maximization of a function of said quality indicator and thus optimize the transmission of the pilot signal.
REFERENCES:
patent: 2004/0178954 (2004-09-01), Vook et al.
patent: 1265377 (2002-12-01), None
patent: WO 03077491 (2003-09-01), None
Banister, B.C. et al., “Implementation of Transit Antenna Weight Adaptation Through Stochastic Gradient Feedback”,.2001 pp. 1517-1524, vol. 2, Signals, Systems and Computers, 2001 Conference Record of the Thirty-Fifth Asilomare Conference.
Banister, B.C. et al., “A Stochastic Gradient Algorithm for Transmit Antenna Weight Adaptationi with Feedback”, 2001, pp. 314-317, Wireless Communications, 2001 IEEE Third Workshop on Signal Processing Advances.
Banister, B.C. et al, “A Simple Gradient Sign Algorithm, for Transmit Antenna Weight Adaption with Feedback”, May 2003, pp. 1156-1171, vol. 51, Issue 5, Signal Processing, IEEE Transactions on.
Halle, B., “Algorithms and VLSI Architectures for RLS-Based Time Reference Beamforming in Mobile Communications”, 1998 pp. 29-36, International Zurich Seminar, Broadband Communication 1998.
Swedish Patent office, International Search Report for PCT/SE2003/02071, dated Jul. 23, 2004.
Astely David
Larsson Peter
Burleigh Roger S.
Nguyen Lee
Telefonaktiebolaget L M Ericsson (Publ)
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