Probabilistic 16-QAM Shaping in WDM Systems

被引：93

作者：

Pan, Chunpo ^{[1
]}

Kschischang, Frank R. ^{[1
]}

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2016年 / 34卷 / 18期

关键词：

Communication system nonlinearities; error-correction coding; optical fiber communication; probabilistic shaping; DIGITAL BACKPROPAGATION; COMPENSATION;

D O I：

10.1109/JLT.2016.2594296

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：

This work proposes a probabilistic shaping scheme for optical WDM systems, where nonlinear interference noise depends on the input optical signal power distribution. With 16-QAM, a white Gaussian channel analysis shows that the shaped constellation is able to achieve a reach improvement of up to 7%, while split-step Fourier method simulations suggest that even higher gains are possible in practice. An example system is developed for a transmission distance around 3280 km. A constellation mapping and a low-density parity-check code are developed for this regime to show a reach improvement of 7.1%. These shaping schemes can also be extended to 64-QAM, where a reach improvement of over 10% is expected.

引用

页码：4285 / 4292

页数：8

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