在IM/DD传输系统中,基于非线性过器的低复杂度聚类多项式非线性电力分散预补偿方案
Optics express
|October 20, 2023
概括
一个新的多项式非线性过器 (PNLF) 方案为光学系统提供了高效的色色分散 (CD) 补偿. 这种低复杂度的方法可以显著降低计算负载,同时在强度调制和直接检测系统中保持高性能.
科学领域:
- 光学通信是指光学通信.
- 信号处理 信号处理
- 非线性光学是非线性光学.
背景情况:
- 颜色分散 (CD) 在强度调制和直接检测 (IM/DD) 光传输系统中显著降低信号质量.
- 像Gerchberg-Saxton (GS) 这样的代算法对于CD预补偿是有效的,但其计算复杂性很高.
- 现有的方法很难有效地解决CD引起的线性和非线性扭曲.
研究的目的:
- 为IM/DD光学系统提出一个低复杂度,非代的CD预补偿方案.
- 使用多项式非线性过器 (PNLF) 来近似代算法的非线性转移函数.
- 调查k-means集群算法的有效性,以进一步降低复杂性.
主要方法:
- 开发了一种基于多项式非线性波器 (PNLF) 的电散预补偿 (EDC) 方案.
- 将PNLF与Gerchberg-Saxton (GS) 算法的代过程集成为非代补偿.
- 引入了k-means集群到PNLF计划中,以创建基于PNLF的集群预 EDC,以减少复杂性.
主要成果:
- 在模拟中,基于PNLF的预EDC降低了76.0%的复杂性,而基于PNLF的集群则降低了97.5%,而基于GS的预EDC则降低了56%的复杂性 (56 GBaud,80km OOK).
- 这两种方案在20%的预期错误校正 (FEC) 门下只需0.3dB的接收器灵敏度处罚.
- 实验结果 (32 GBaud,80公里OOK) 证实了显著的复杂性节省 (78.3%和94.2%),最小的惩罚 (0.4dB).
结论:
- 基于PNLF的预EDC方案有效地弥补了IM/DD系统中CD引起的线性和非线性扭曲.
- 基于PNLF的集群前EDC可大幅降低复杂性,对性能影响微乎其微.
- 这些方案显示出高性能,具有成本效益的光传输系统的巨大潜力.
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