Method and apparatus for joint equalization and decoding of multilevel codes

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United States of America Patent

PATENT NO 8189704
APP PUB NO 20090129519A1
SERIAL NO

12359778

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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, PA1737
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD.SINGAPORE, SG22187

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Azadet, Kameran Morganville, US 85 564
Haratsch, Erich Franz Bethlehem, US 30 540

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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National Semiconductor Corporation (4)
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LUCENT TECHNOLOGIES INC. (1)
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ANDREW CORPORATION (1)
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GULA CONSULTING LIMITED LIABILITY COMPANY (1)
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UNIVERSITE DU QUEBEC A MONTREAL (1)
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TEXAS INSTRUMENTS INCORPORATED (1)
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LENOVO (SINGAPORE) PTE. LTD. (1)
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AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (3)
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UNIVERSITY OF SOUTHERN CALIFORNIA (1)
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* Cited By Examiner

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