19 November 2007 Low-cost multimode fiber gigabit Ethernet using Manchester encoded signal for an improved transmission performance
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Proceedings Volume 6783, Optical Transmission, Switching, and Subsystems V; 67830K (2007) https://doi.org/10.1117/12.744653
Event: Asia-Pacific Optical Communications, 2007, Wuhan, China
Abstract
We study the transmission performance of Manchester encoded signals over multimode fibers at 1.25 Gb/s and 2.5 Gb/s focusing on regimes where there is strong slowly time varying signal fading and noise corruption. This fading and noise is due both to the modal noise and the dispersion varying cruel environmental effects. A non-return-to-zero (NRZ) modulation scheme typically used in the transmission suffers severally from such slowly varying signal fading; whereas Manchester encoded signal, which carries the binary value by the pulse position within a bit slot, in contrast, has a better performance in coping with the slowly varying signal degradation. In this paper, we study the transmission performance of these two signaling schemes, and the results show that Manchester encoding outperforms NRZ in coping with slowly varying signal degradation.
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C. H. Kwok, Richard V. Penty, Ian H. White, "Low-cost multimode fiber gigabit Ethernet using Manchester encoded signal for an improved transmission performance", Proc. SPIE 6783, Optical Transmission, Switching, and Subsystems V, 67830K (19 November 2007); doi: 10.1117/12.744653; https://doi.org/10.1117/12.744653
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