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- Alic, N., et al.
(författare)
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Benefits of Joint Statistics in MLSD-Equalized Transmission
- 2009
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Ingår i: IEEE Photonics Technology Letters. - 1041-1135 .- 1941-0174. ; 21:8, s. 495-497
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Tidskriftsartikel (refereegranskat)abstract
- We experimentally investigate and quantify performance improvement, accounting for multiple bit intervals' joint statistics in filtered equalized on-off keying OC-192 fiber-optic links relying on Viterbi-algorithm-based sequence detection. We demonstrate that the penalty associated with narrow filtering can be alleviated for the most part with an appropriate detection approach.
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| 3. |
- Alic, N., et al.
(författare)
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Joint Statistics and MLSD in Filtered Incoherent High-Speed Fiber-Optic Communications
- 2010
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Ingår i: Journal of Lightwave Technology. - 0733-8724 .- 1558-2213. ; 28:10, s. 1564-1572
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Tidskriftsartikel (refereegranskat)abstract
- In this paper, signal statistics and their utilization for detection in narrowly filtered equalized high-speed fiber-optic communications are investigated experimentally. Tradeoffs between log-likelihood metric applications and oversampling are covered in detail. It is, for the first time, demonstrated that performance loss in bandwidth-limited systems can be nearly fully recovered (to within 0.5 dB) by taking advantage of band-width-limitation-induced noise correlations and oversampling.
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| 6. |
- Gonzalez-Mirelis, Genoveva, 1977, et al.
(författare)
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Using Vessel Monitoring System Data to Improve Systematic Conservation Planning of a Multiple-Use Marine Protected Area, the Kosterhavet National Park (Sweden)
- 2014
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Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 43:2, s. 162-174
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Tidskriftsartikel (refereegranskat)abstract
- When spatial fishing data is fed into systematic conservation planning processes the cost to a fishery could be ensured to be minimal in the zoning of marine protected areas. We used vessel monitoring system (VMS) data to map the distribution of prawn trawling and calculate fish- ing intensity for 1-ha grid cells, in the Kosterhavet National Park (Sweden). We then used the software Marxan to generate cost-efficient reserve networks that represented every biotope in the Park. We asked what were the potential gains and losses in terms of fishing effort and species conservation of different planning scenarios. Given a conservation target of 10 % representation of each bio- tope, the fishery need not lose more than 20 % of its fishing grounds to give way to cost-efficient conservation of ben- thic diversity. No additional reserved area was needed to achieve conservation targets while minimizing fishing costs. We discuss the benefits of using VMS data for conservation planning.
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| 7. |
- Lu, Guo-Wei, 1976, et al.
(författare)
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40-Gbaud 16-QAM transmitter using tandem IQ modulators with binary driving electronic signals
- 2010
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Ingår i: Optics Express. - 1094-4087 .- 1094-4087. ; 18:22, s. 23062-23069
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Tidskriftsartikel (refereegranskat)abstract
- We propose a novel 16-quadrature amplitude modulation (QAM) transmitter based on two cascaded IQ modulators driven by four separate binary electrical signals. The proposed 16-QAM transmitter features scalable configuration and stable performance with simple bias-control. Generation of 16-QAM signals at 40 Gbaud is experimentally demonstrated for the first time and visualized with a high speed constellation analyzer. The proposed modulator is also compared to two other schemes. We investigate the modulator bandwidth requirements and tolerance to accumulated chromatic dispersion through numerical simulations, and the minimum theoretical insertion attenuation is calculated analytically.
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| 9. |
- Sjödin, Martin E, 1983, et al.
(författare)
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Cancellation of SPM in Self-Homodyne Coherent Systems
- 2009
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Ingår i: Proceedings of European Conference on Optical Communication, ECOC 2009, Vienna, Austria, September 20-24, 2009, paper We8.4.5.
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Konferensbidrag (refereegranskat)abstract
- The signal and local oscillator acquire identical nonlinear phase shifts during propagation in a selfhomodynecoherent system. We exploit this to achieve cancellation of the phase distortion caused by self-phasemodulation.
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