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Proceedings Paper

Optimized signal constellations for ultra-high-speed optical transport
Author(s): Shaoliang Zhang; Tao Liu; Yequn Zhang; Fatih Yaman; Ivan B. Djordjevic; Ting Wang
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Paper Abstract

The joint optimization of coding and modulation formats would provide significant receiver sensitivity improvement due to the increased Hamming distance of codes. By applying Arimoto-Blahut algorithm to maximize mutual information, optimized coded-modulation has been found out together with optimized bit-mapping rule. Simulated channel capacity shows that optimized coded modulation could outperform its counterparts, such as regular qaudrature-amplitude modulation, by around 0.3dB up to about 0.9 coding rate. The improvement is found to be larger in higher modulation formats. Optimal coded-8QAM modulation has been further verified in experiment, where 40Tb/s over 6787km is demonstrated by transmitting 200G per wavelength thanks to the better receiver sensitivity of optimal coded modulation.

Paper Details

Date Published: 7 February 2015
PDF: 8 pages
Proc. SPIE 9388, Optical Metro Networks and Short-Haul Systems VII, 93880F (7 February 2015); doi: 10.1117/12.2078512
Show Author Affiliations
Shaoliang Zhang, NEC Labs. America, Inc. (United States)
Tao Liu, The Univ. of Arizona (United States)
Yequn Zhang, The Univ. of Arizona (United States)
Fatih Yaman, NEC Labs. America, Inc. (United States)
Ivan B. Djordjevic, The Univ. of Arizona (United States)
Ting Wang, NEC Labs. America, Inc. (United States)

Published in SPIE Proceedings Vol. 9388:
Optical Metro Networks and Short-Haul Systems VII
Atul K. Srivastava; Benjamin B. Dingel; Achyut K. Dutta, Editor(s)

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