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.

引用

页数：8

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