Optimized Signal Constellations for Ultra-High-Speed Optical Transport

被引：0
|
作者：
Zhang, Shaoliang [1 ]
Liu, Tao [2 ]
Zhang, Yequn [2 ]
Yaman, Fatih [1 ]
Djordjevic, Ivan B. [2 ]
Wang, Ting [1 ]
机构：
[1] NEC Labs Amer Inc, Princeton, NJ 08540 USA
[2] Univ Arizona, ECE Dept, Tucson, AZ 85721 USA
来源：
OPTICAL METRO NETWORKS AND SHORT-HAUL SYSTEMS VII | 2015年 / 9388卷
关键词：
Optimized Constellation; coded-modulation; MODULATION;
D O I：
10.1117/12.2078512
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
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页数：8
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