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Proceedings Paper

Energy-efficient hybrid coded modulations enabling terabit optical ethernet
Author(s): Ivan B. Djordjevic
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Paper Abstract

Future Internet technologies will be affected not only by limited bandwidth of information infrastructure, but also by its energy consumption. In order to solve both problems simultaneously, in this invited paper, we describe several energy-efficient (EE) hybrid coded-modulation (CM) schemes enabling Terabit optical Ethernet: EE 4D CM, EE generalized- OFDM, and EE spatial-domain-based CM. A common property of these is employment of EE modulations, various degrees of freedom and rate-adaptive coding. These EE schemes are called hybrid as all available degrees of freedom are used for transmission over optical fibers including amplitude, phase, polarization and OAM. Since the channel capacity is a linear function in number of dimensions, by increasing the number of basis functions, we can dramatically improve overall capacity. The EE problem is solved by properly designing multi-dimensional signal constellations such that transinformation is maximized, while taking the energy constraint into account.

Paper Details

Date Published: 24 January 2012
PDF: 16 pages
Proc. SPIE 8283, Optical Metro Networks and Short-Haul Systems IV, 828304 (24 January 2012); doi: 10.1117/12.912031
Show Author Affiliations
Ivan B. Djordjevic, The Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 8283:
Optical Metro Networks and Short-Haul Systems IV
Werner Weiershausen; Benjamin Dingel; Achyut Dutta; Atul K. Srivastava, Editor(s)

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