Comparison of Geometrically Shaped and Probabilistically Shaped Bit-Loading DMT for Optical Interconnect System

被引：4
|
作者：
Ding, Junjie [1 ]
Zhang, Jiao [1 ]
Yu, Jianjun [1 ]
机构：
[1] Fudan Univ, Key Lab Informat Sci Electromagnet Waves, Shanghai 200433, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2020年 / 12卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Bit-loading; probabilistic shaping (PS); geometric shaping (GS); intensity modulation and direct detection (IM-DD); OFDM; TRANSMISSION; SIGNAL;
D O I：
10.1109/JPHOT.2020.2979752
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：
We experimentally demonstrate the transmission performance of the bit-loading discrete multi-tone (DMT) signal in intensity modulation and direct detection (IM-DD) system with a transmission distance of 2km and a net data rate of 108-Gb/s by two different shaping methods. A detailed comparison between the application of geometric shaping (GS) and probabilistic shaping (PS) in bit-loading DMT is presented. With continuous entropy loading for better channel fitting, probabilistically shaped bit-loading DMT achieves 1-dB receiver sensitivity gain compared to the conventional bit-loading DMT and outperforms geometrically shaped bit-loading DMT in the transmission experiment.
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收藏
页数：8
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