Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2006-06-13
2006-06-13
Corrielus, Jean B. (Department: 2637)
Pulse or digital communications
Equalizers
Automatic
C375S234000, C375S235000, C455S203000, C455S204000
Reexamination Certificate
active
07061977
ABSTRACT:
An apparatus and method is disclosed for using adaptive algorithms to exploit sparsity in target weight vectors in an adaptive channel equalizer. An adaptive algorithm comprises a selected value of a prior and a selected value of a cost function. The present invention comprises algorithms adapted for calculating adaptive equalizer coefficients for sparse transmission channels. The present invention provides sparse algorithms in the form of a Sparse Least Mean Squares (LMS) algorithm and a Sparse Constant Modulus Algorithm (CMA) and a Sparse Decision Directed (DD) algorithm.
REFERENCES:
patent: 4027257 (1977-05-01), Perreault
patent: 4141072 (1979-02-01), Perreault
patent: 5526378 (1996-06-01), Knutson et al.
patent: 6426972 (2002-07-01), Endres et al.
patent: 6477200 (2002-11-01), Agazzi et al.
patent: 2002/0086707 (2002-07-01), Struhsaker et al.
patent: 0717559 (1996-06-01), None
patent: 1014635 (2000-06-01), None
Myeong-Hwan Lee et al An adativre Channel Equalizer Based on Sign Permutation Filtering Framework, IEEE 1988, Multimedia Technology Center, Samsung Information Systems America Inc.
Sato, “A Method of Self-Recovering Equalization for Multilevel Amplitude-Modulation”, IEEE Communications Society Feb. 11, 1975.
“Trellis-Coded Modulation with Redundant Signal Sets Part 1: Introduction”, by Gottfried Ungerboeck, Feb. 1987, vol. 25, No. 2.
“Exponentiated Gradient versus Gradient Descent for Linear Predictors”, by J. Kivinen et al., Information & Computation vol. 132, pp. 1-63.
“Riemannian Structure of Some New Gradient Descent Learning Algorithms”, by Robert E. Mahony et al.
“Exploiting Sparsity in Equalization Algorithms”, by Richard Martin et al, Aug. 15, 2000.
“Convergence of Exponentiated Gradient Algorithms”, by Simon I. Hill et al.
“An Analysis of the Exponentiated Gradient Descent Algorithm” by Hill et al.; Fifth International Symposium on Signal Processing and its Applications, ISSPA '99, Brisbane, Australia, Aug. 22-25, 1999.
International Search Report dated Dec. 28, 2001.
Martin Richard K.
Sethares William A.
Williamson Robert C.
Corrielus Jean B.
Ghulamali Qutub
Koninklijke Philips Electronics , N.V.
Liberchuk Larry
LandOfFree
Apparatus and method for using adaptive algorithms to... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for using adaptive algorithms to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for using adaptive algorithms to... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3674281