On the Complexity Reduction of the Second-Order Volterra Nonlinear Equalizer for IM/DD Systems

被引：91
|
作者：
Diamantopoulos, Nikolaos-Panteleimon [1 ]
Nishi, Hidetaka [1 ]
Kobayashi, Wataru [1 ]
Takeda, Koji [1 ]
Kakitsuka, Takaaki [1 ]
Matsuo, Shinji [1 ]
机构：
[1] NTT Corp, NTT Device Technol Labs, Atsugi, Kanagawa 2430198, Japan
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2019年 / 37卷 / 04期
关键词：
Direct detection; intensity modulation; nonlinear equalization; optical interconnects; PAM-4; Volterra filter; DIRECT-DETECTION TRANSMISSION; COMPENSATION; MODULATION;
D O I：
10.1109/JLT.2018.2890118
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：
To cope with the various nonlinear signal distortions in intensity-modulation/direct-detection transmission systems, a theoretical analysis on the Volterra nonlinear equalizer (VNLE) is provided, focusing on computational complexity aspects. The analysis yields a simple reduced-complexity scheme for the secondorder VNLE (R2-VNLE) based on a performance-complexity tradeoff. An experimental verification is performed with single-sideband 28-GBaud PAM-4 signals, generated by an electroabsorption modulated distributed-feedback laser, over transmission distances of up to 80 km of standard single-mode fiber in the C-band. A comparison of the results for different equalization schemes, including a signal-signal beat interference mitigation technique, shows superior performance for the R2-VNLE.
引用
收藏
页码：1214 / 1224
页数：11
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