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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May 29, 2012
Issued date -
Jan 26, 2009
filing date -
12/359,778
serial no -
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Abstract
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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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 6,038,269 Detection for digital communication receivers | 32 | 1997 | |
| 6,115,418 Simplified equalizer for twisted pair channel | 28 | 1998 | |
| 6,418,172 Look-ahead maximum likelihood sequence estimation decoder | 14 | 1999 | |
| 6,798,828 Full duplex gigabit-rate transceiver front-end and method operation | 16 | 2000 | |
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| 6,178,198 Apparatus for, and method of, processing signals transmitted over a local area network | 20 | 1997 | |
| 6,744,831 Adaptive electronic transmission signal cancellation apparatus for full duplex communication | 39 | 2002 | |
| 2003/0115,061 MPSK equalizer | 14 | 2002 | |
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| 7,012,976 Method for decoding and of joint equalization of a digital signal protected by a code defined by a trellis | 2 | 2000 | |
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| 6,081,562 Implementing reduced-state viterbi detectors | 28 | 1997 | |
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| 5,031,195 Fully adaptive modem receiver using whitening matched filtering | 70 | 1989 | |
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| 6,690,754 Method and apparatus for reducing the computational complexity and relaxing the critical path of reduced state sequence estimation (RSSE) techniques | 15 | 1999 | |
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| 6,377,640 Means and method for a synchronous network communications system | 205 | 1998 | |
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| 6,961,392 Joint equalization and decoding using a search-based decoding algorithm | 5 | 2001 | |
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| 5,546,430 Detector for demodulating a received signal and producing an information data signal with reduced intersymbol interference | 28 | 1995 | |
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| 5,432,821 System and method for estimating data sequences in digital transmissions | 70 | 1992 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
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| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Nov 29, 2015 |
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| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Nov 29, 2023 |
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