C-Band 112-Gb/s PAM-4 Transmission Employing Cluster-Pruning LUT-Based Volterra DFE

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-09-02 DOI:10.1109/LPT.2025.3604812

Junwei Zhang;Qiang Bin;Yutong Liu;Alan Pak Tao Lau;Zhaohui Li;Chao Lu

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引用次数: 0

Abstract

We propose a low-complexity cluster-pruning look-up-table-based Volterra decision-feedback equalizer (CPLUT-VDFE) to substantially reduce the computational complexity associated with compensating for chromatic dispersion (CD) and nonlinear distortions in intensity modulation and direct detection (IM/DD) transmission systems. By employing CPLUTs, the proposed CPLUT-VDFE not only eliminates all multiplication operations required for the implementation of the VDFE, but also significantly reduces the overall table size. The performance of the proposed CPLUT-VDFE is evaluated after Volterra feed-forward equalization in a C-band 112-Gb/s PAM-4 50-km transmission system. Experimental results demonstrate that the proposed CPLUT-VDFE, with 82 cluster centers, achieves comparable equalization performance to the cluster-assisting LUT-VDFE (CLUT-VDFE) with 110 cluster centers, while reducing the total table size by 71.1% and the number of real-valued additions by 25.7%. Furthermore, the proposed CPLUT-VDFE, with 42 cluster centers, can achieve a 99.9% reduction in total table size and a 62.4% decrease in the number of real-valued additions compared to the CLUT-VDFE with 110 cluster centers, at the expense of a 1-dB power penalty.

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基于簇修剪lut的Volterra DFE c波段112gb /s PAM-4传输

我们提出了一种低复杂度的基于簇切查找表的Volterra决策反馈均衡器（cprit - vdfe），以大大降低与补偿色散（CD）和非线性失真相关的计算复杂性在强度调制和直接检测（IM/DD）传输系统中。通过使用CPLUTs，所建议的cpluto -VDFE不仅消除了实现VDFE所需的所有乘法操作，而且还显著减小了整个表的大小。在c波段112-Gb/s PAM-4 50公里传输系统中，通过Volterra前馈均衡对所提出的cprt - vdfe的性能进行了评估。实验结果表明，基于82个聚类中心的cprit - vdfe与基于110个聚类中心的cprit - vdfe （CLUT-VDFE）的均衡性能相当，且总表大小减少了71.1%，实值添加数减少了25.7%。此外，与具有110个集群中心的cclut - vdfe相比，具有42个集群中心的cput - vdfe可以实现总表大小减少99.9%，实值添加数量减少62.4%，但代价是功耗损失为1 db。

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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.