Low-Complexity Nonlinear Tomlinson-Harashima Precoding Based on Absolute-Term for ZR Inter-DCI

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-11-22 DOI:10.1109/LPT.2024.3504836

Zhuo Chen;Jie Zhang;Zipeng Liang;Xiaoxiao Dai;Qi Yang;Liang Wang;Lei Deng;Mengfan Cheng;Deming Liu

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Abstract

Due to the sensitivity to cost and power consumption, the intensity modulation direct detection (IM/DD) transmission system attracts significant interest in inter-data center interconnections. In medium reach IM/DD transmission systems, chromatic dispersion caused power fading effect appears to be a major performance limiting problem for double sideband (DSB) signal. Tomlinson-Harashima Precoding (THP) is an effective method for compensating for the dispersion at the transmitter side. By incorporating nonlinear kernels into the transfer function, the nonlinear THP can compensate both the dispersion and the nonlinear distortion of the signal and improve the performance of the system. However, the added nonlinear kernels will significantly increase the complexity. To reduce the complexity of nonlinear THP, we propose a low-complexity absolute-term kernel based nonlinear THP scheme. Compared with the conventional Volterra kernel based THP scheme, the proposed methods can reduce the number of multipliers by 50%-60% without performance degradation. We successfully demonstrate a 70-km 40-Gbaud and a 90-km 30-Gbaud DSB PAM-4 C-band IM/DD transmission over dispersion-uncompensated links.

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.