Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis
A number of simplified models, based on perturbation theory, have been proposed for the fiber-optical channel and have been extensively used in the literature. Although these models are mainly developed for the low-power regime, they are used at moderate or high powers as well. It remains unclear to...
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| Format: | Article |
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MDPI AG
2019-08-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/21/8/760 |
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| author | Kamran Keykhosravi Giuseppe Durisi Erik Agrell |
| author_facet | Kamran Keykhosravi Giuseppe Durisi Erik Agrell |
| author_sort | Kamran Keykhosravi |
| collection | DOAJ |
| description | A number of simplified models, based on perturbation theory, have been proposed for the fiber-optical channel and have been extensively used in the literature. Although these models are mainly developed for the low-power regime, they are used at moderate or high powers as well. It remains unclear to what extent the capacity of these models is affected by the simplifying assumptions under which they are derived. In this paper, we consider single-channel data transmission based on three continuous-time optical models: (i) a regular perturbative channel, (ii) a logarithmic perturbative channel, and (iii) the stochastic nonlinear Schrödinger (NLS) channel. To obtain analytically tractable discrete-time models, we consider zero-dispersion fibers and a sampling receiver. We investigate the per-sample capacity of these models. Specifically, (i) we establish tight bounds on the capacity of the regular perturbative channel; (ii) we obtain the capacity of the logarithmic perturbative channel; and (iii) we present a novel upper bound on the capacity of the zero-dispersion NLS channel. Our results illustrate that the capacity of these models departs from each other at high powers because these models yield different capacity pre-logs. Since all three models are based on the same physical channel, our results highlight that care must be exercised in using simplified channel models in the high-power regime. |
| first_indexed | 2024-04-13T06:18:38Z |
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| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-13T06:18:38Z |
| publishDate | 2019-08-01 |
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| spelling | doaj.art-fcb2ee6757e84cd28436060fcfa512042022-12-22T02:58:44ZengMDPI AGEntropy1099-43002019-08-0121876010.3390/e21080760e21080760Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity AnalysisKamran Keykhosravi0Giuseppe Durisi1Erik Agrell2Department of Electrical Engineering, Chalmers University of Technology, 41296 Gothenburg, SwedenDepartment of Electrical Engineering, Chalmers University of Technology, 41296 Gothenburg, SwedenDepartment of Electrical Engineering, Chalmers University of Technology, 41296 Gothenburg, SwedenA number of simplified models, based on perturbation theory, have been proposed for the fiber-optical channel and have been extensively used in the literature. Although these models are mainly developed for the low-power regime, they are used at moderate or high powers as well. It remains unclear to what extent the capacity of these models is affected by the simplifying assumptions under which they are derived. In this paper, we consider single-channel data transmission based on three continuous-time optical models: (i) a regular perturbative channel, (ii) a logarithmic perturbative channel, and (iii) the stochastic nonlinear Schrödinger (NLS) channel. To obtain analytically tractable discrete-time models, we consider zero-dispersion fibers and a sampling receiver. We investigate the per-sample capacity of these models. Specifically, (i) we establish tight bounds on the capacity of the regular perturbative channel; (ii) we obtain the capacity of the logarithmic perturbative channel; and (iii) we present a novel upper bound on the capacity of the zero-dispersion NLS channel. Our results illustrate that the capacity of these models departs from each other at high powers because these models yield different capacity pre-logs. Since all three models are based on the same physical channel, our results highlight that care must be exercised in using simplified channel models in the high-power regime.https://www.mdpi.com/1099-4300/21/8/760achievable ratechannel capacityinformation theorynonlinear channeloptical fiber |
| spellingShingle | Kamran Keykhosravi Giuseppe Durisi Erik Agrell Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis Entropy achievable rate channel capacity information theory nonlinear channel optical fiber |
| title | Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis |
| title_full | Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis |
| title_fullStr | Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis |
| title_full_unstemmed | Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis |
| title_short | Accuracy Assessment of Nondispersive Optical Perturbative Models through Capacity Analysis |
| title_sort | accuracy assessment of nondispersive optical perturbative models through capacity analysis |
| topic | achievable rate channel capacity information theory nonlinear channel optical fiber |
| url | https://www.mdpi.com/1099-4300/21/8/760 |
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