Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-04-08
2008-04-08
Vo, Don N (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S267000, C375S350000
Reexamination Certificate
active
07356073
ABSTRACT:
A method is disclosed to obtain M final symbol decisions for signals received through N receive antennas that were transmitted in M parallel data layers, using a same spreading code from M transmit antennas. The method includes space-time equalizing the N received signals to generate M output signals from which at least inter-symbol interference is substantially removed and inter-layer interference is suppressed; despreading each of the M output signals for generating M soft symbol estimates; and processing the M soft symbol estimates to derive M final symbol decisions that are made in consideration of modeled residual inter-layer interference present in the space-time equalized M output signals. Processing includes operating a signal-plus-residual-interference (SPRI) detector that operates in accordance with a maximum likelihood (ML) technique, while space-time equalizing employs a linear minimum mean-square error (LMMSE) criterion. Transmitting may occur at a base station having the M transmit antennas, and receiving may occur at a mobile station having the N receive antennas.
REFERENCES:
patent: 6785341 (2004-08-01), Walton et al.
patent: 7010016 (2006-03-01), Margulis et al.
patent: 7218665 (2007-05-01), McElwain
patent: 2006/0291581 (2006-12-01), Onggosanusi et al.
Bauch, Gerhard and Al-Dhahir, Naofal, “Reduced-Complexity Space-Time Turbo-Equalization for Frequency-Selective MIMO Channels”, 2002 IEEE, pp. 819-828.
Holter, Bengt, “On the Capacity of the MIMO Channel”, Norwegian University of Science and Technology, 2001, pp. 1-19.
Luo, Hui, Liu, Ruey-Wen, Lin, Xieting and Li, Xin, “The Autocorrelation Matching Method for Distributed MIMO Communications Over Unknown FIR Channels”, AT&T Labs, University of Notre Dame and Fudan University, 2001 IEEE.
Swindlehurst, A. Lee and Leus, Geert, “A General Framework for Space-Time Coding in MIMO Wireless Communications Systems”, Brigham Young University; May 5, 2003.
Thomas, Timothy A. and Vook, Frederick W., “Broadband MIMO-OFDM Channel Estimation via Near-Maximum Likelihood Time of Arrival Estimation”, Motorola Labs, 2002 IEEE, pp. III-2569 to III-2572.
Chan, Albert M. and Lee, Inkyu, A New Reduced-Complexity Sphere Decoder for Multiple Antenna Systems, MIT and Agere Systems, 2002 IEEE, pp. 460-464.
Harrington & Smith PC
Nokia Corporation
Vo Don N
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