US Patent No: 8,189,704

Number of patents in Portfolio can not be more than 2000

Method and apparatus for joint equalization and decoding of multilevel codes

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ALSO PUBLISHED AS: 20090129519
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Abstract

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A method and apparatus are provided for joint equalization and decoding of multilevel codes, such as the Multilevel Threshold-3 (MLT-3) code, which are transmitted over dispersive channels. The MLT-3 code is treated as a code generated by a finite-state machine using a trellis having state dependencies between the various states. A super trellis concatenates the MLT-3 trellis with a trellis representation of the channel. Joint equalization and decoding of the received signal can be performed using the super trellis. A sequence detector is disclosed that uses the super trellis or a corresponding reduced-state trellis to perform joint equalization and decoding of the received signal to decode the MLT-3 coded data bits. The sequence detector may be embodied using maximum likelihood sequence estimation that applies the optimum Viterbi algorithm or a reduced complexity sequence estimation method, such as the reduced-state sequence estimation (RSSE) algorithm.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
AGERE SYSTEMS INC.ALLENTOWN, PA2646

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Azadet, Kameran Morganville, NJ 104 287
Haratsch, Erich Franz Bethlehem, PA 51 293

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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BROADCOM CORPORATION (3)
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ANDREW CORPORATION (1)
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CIF LICENSING, LLC (1)
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GULA CONSULTING LIMITED LIABILITY COMPANY (1)
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HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. (1)
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LENOVO (SINGAPORE) PTE LTD. (1)
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LUCENT TECHNOLOGIES INC. (1)
6,690,754 Method and apparatus for reducing the computational complexity and relaxing the critical path of reduced state sequence estimation (RSSE) techniques 19 1999
 
STANFORD SYNCOM INC. (1)
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TEXAS INSTRUMENTS INCORPORATED (1)
6,961,392 Joint equalization and decoding using a search-based decoding algorithm 5 2001
 
UNIVERSITE DU QUEBEC A MONTREAL (1)
5,546,430 Detector for demodulating a received signal and producing an information data signal with reduced intersymbol interference 28 1995
 
UNIVERSITY OF SOUTHERN CALIFORNIA (1)
5,432,821 System and method for estimating data sequences in digital transmissions 75 1992

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