Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels
The space-time whitened matched filter (ST-WMF) maximum likelihood sequence detection (MLSD) architecture has been recently proposed (Maggio et al., 2014). Its objective is reducing implementation complexity in transmissions over nonlinear dispersive channels. The ST-WMF-MLSD receiver (i) drasticall...
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Wiley
2015-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/736267 |
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| author | Gabriel N. Maggio Mario R. Hueda Oscar E. Agazzi |
| author_facet | Gabriel N. Maggio Mario R. Hueda Oscar E. Agazzi |
| author_sort | Gabriel N. Maggio |
| collection | DOAJ |
| description | The space-time whitened matched filter (ST-WMF) maximum likelihood sequence detection (MLSD) architecture has been recently proposed (Maggio et al., 2014). Its objective is reducing implementation complexity in transmissions over nonlinear dispersive channels. The ST-WMF-MLSD receiver (i) drastically reduces the number of states of the Viterbi decoder (VD) and (ii) offers a smooth trade-off between performance and complexity. In this work the ST-WMF-MLSD receiver is investigated in detail. We show that the space compression of the nonlinear channel is an instrumental property of the ST-WMF-MLSD which results in a major reduction of the implementation complexity in intensity modulation and direct detection (IM/DD) fiber optic systems. Moreover, we assess the performance of ST-WMF-MLSD in IM/DD optical systems with chromatic dispersion (CD) and polarization mode dispersion (PMD). Numerical results for a 10 Gb/s, 700 km, and IM/DD fiber-optic link with 50 ps differential group delay (DGD) show that the number of states of the VD in ST-WMF-MLSD can be reduced ~4 times compared to an oversampled MLSD. Finally, we analyze the impact of the imperfect channel estimation on the performance of the ST-WMF-MLSD. Our results show that the performance degradation caused by channel estimation inaccuracies is low and similar to that achieved by existing MLSD schemes (~0.2 dB). |
| format | Article |
| id | doaj-art-42c654fcc4164b6f9c21de3a3a2c3ee5 |
| institution | DOAJ |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-42c654fcc4164b6f9c21de3a3a2c3ee52025-08-20T02:39:18ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552015-01-01201510.1155/2015/736267736267Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical ChannelsGabriel N. Maggio0Mario R. Hueda1Oscar E. Agazzi2Laboratorio de Comunicaciones Digitales, Universidad Nacional de Córdoba, CONICET, Avenida Vélez Sarsfield 1611, Córdoba X5016GCA, ArgentinaLaboratorio de Comunicaciones Digitales, Universidad Nacional de Córdoba, CONICET, Avenida Vélez Sarsfield 1611, Córdoba X5016GCA, ArgentinaClariPhy Communications, Inc., 7585 Irvine Center Drive, Suite 100, Irvine, CA 92618, USAThe space-time whitened matched filter (ST-WMF) maximum likelihood sequence detection (MLSD) architecture has been recently proposed (Maggio et al., 2014). Its objective is reducing implementation complexity in transmissions over nonlinear dispersive channels. The ST-WMF-MLSD receiver (i) drastically reduces the number of states of the Viterbi decoder (VD) and (ii) offers a smooth trade-off between performance and complexity. In this work the ST-WMF-MLSD receiver is investigated in detail. We show that the space compression of the nonlinear channel is an instrumental property of the ST-WMF-MLSD which results in a major reduction of the implementation complexity in intensity modulation and direct detection (IM/DD) fiber optic systems. Moreover, we assess the performance of ST-WMF-MLSD in IM/DD optical systems with chromatic dispersion (CD) and polarization mode dispersion (PMD). Numerical results for a 10 Gb/s, 700 km, and IM/DD fiber-optic link with 50 ps differential group delay (DGD) show that the number of states of the VD in ST-WMF-MLSD can be reduced ~4 times compared to an oversampled MLSD. Finally, we analyze the impact of the imperfect channel estimation on the performance of the ST-WMF-MLSD. Our results show that the performance degradation caused by channel estimation inaccuracies is low and similar to that achieved by existing MLSD schemes (~0.2 dB).http://dx.doi.org/10.1155/2015/736267 |
| spellingShingle | Gabriel N. Maggio Mario R. Hueda Oscar E. Agazzi Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels Journal of Electrical and Computer Engineering |
| title | Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels |
| title_full | Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels |
| title_fullStr | Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels |
| title_full_unstemmed | Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels |
| title_short | Maximum Likelihood Sequence Detection Receivers for Nonlinear Optical Channels |
| title_sort | maximum likelihood sequence detection receivers for nonlinear optical channels |
| url | http://dx.doi.org/10.1155/2015/736267 |
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