Pulse or digital communications – Receivers
Reexamination Certificate
2008-01-04
2011-10-25
Wang, Ted (Department: 2611)
Pulse or digital communications
Receivers
C375S285000, C375S340000, C375S346000
Reexamination Certificate
active
08045645
ABSTRACT:
A device that estimates information from a signal includes a receiver for receiving an input signal and electronic processing circuitry. The electronic processing circuitry generates a matrix associated with the input signal and determines an approximation of an inverse of the matrix based on the adjoint of the matrix and a scaling factor associated with the determinant of the matrix. This approximation avoids possible mathematical difficulties that may be encountered in certain situations when a typical matrix inversion is calculated. The approximated inverse matrix is applied to the input signal to transform the input signal into an output signal. Information associated with the input signal is then determined based on the output signal.
REFERENCES:
patent: 5680419 (1997-10-01), Bottomley
patent: 5796788 (1998-08-01), Bottomley
patent: 7003542 (2006-02-01), Devir
patent: 7852951 (2010-12-01), Kalluri et al.
patent: 2003/0053524 (2003-03-01), Dent
patent: 2005/0201447 (2005-09-01), Cairns et al.
patent: 2007/0076805 (2007-04-01), Kalluri et al.
J.G. Proakis, “Equalization Techniques for High-Density Magnetic Recording,” IEEE Sig. Proc. Mag., vol. 15, pp. 73-82, Jul. 1998.
T. Uyematsu, et al., “An optimization of the Stable Tap-Adjustment Algorithm for the Fractionally Spaced Equalizer,” in Proc. IEEE ICC, Jun. 12-15, 1988, pp. 366-370.
M. Barton, “Performance of SVD-based Fractionally Spaced Equalizers in Data Transmission Systems,” IEEE Trans. Sig. Proc., vol. 42, No. 9, pp. 2499-2501, Sep. 1994.
G.W. Stewart, “On the Adjoint Matrix,” Technical Report, University of Maryland Computer Science Department; CS-TR-3864 UMIACS; UMIACS-TR-98-02, Oct. 15, 1998.
A. Akritas et al., “Computation of the Adjoint Matrix,” Proceedings of the 6thInternational Conference on Computational Science (ICCS 2006), Reading, UK, May 28-31, 2006, Part II, Editors: Vassil Alexandrov et al., Lecture Notes in Computer Science (LNCS), Springer Verlag Berlin/Heidelberg, vol. 3992, pp. 486-489, 2006.
Simon Haykin, “Adaptive Filter Theory” Second Edition, 1991.
Gerstacker, “On Prefilter Computation for Reduced-State Equalization”, IEEE Transactions on Wireless Communications, vol. 1, No. 4, Oct. 2002, pp. 793-800.
U.S. Appl. No. 11/739,126, filed Apr. 24, 2007, Caines et al., “Robust Multicode Detection for HSDPA”.
U.S. Appl. No. 11/739,924, filed Apr. 25, 2007, Wang et al., “Efficient Computation of a Waveform Correlation Matrix”.
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (publ)
Wang Ted
LandOfFree
Signal processor for estimating signal parameters using an... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal processor for estimating signal parameters using an..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal processor for estimating signal parameters using an... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4283569