概括
一个新的隐藏条件随机场 (HCRF) 均衡器有效地减轻了轨道角动量 (OAM) 模式分割复合 (MDM) 光通信系统中的非线性损伤. 这种方法提高了接收器的灵敏度,并减少了与现有技术相比的计算复杂性.
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:
- 轨道角动量 (OAM) 模式划分复杂化 (MDM) 对于超高容量的光纤通信至关重要.
- 非线性损害,包括调制,方律和模式合非线性,严重影响OAM-MDM系统性能.
- 现有的均等化技术在有效缓解这些复杂的非线性扭曲方面面临着挑战.
研究的目的:
- 提出和评估一个基于隐藏条件随机场 (HCRF) 的等分器,用于OAM-MDM系统中的非线性缓解.
- 为了提高20 GBaud三维无载波振幅和阶段调制-64 (3D-CAP-64) 信号通过OAM-MDM光纤通道传输的性能.
- 将拟议的HCRF等级器的性能和计算复杂性与卷积神经网络 (CNN) 和沃尔特拉非线性等级器 (VNE) 方法进行比较.
主要方法:
- 开发一个HCRF等分器来估计隐藏变量的条件概率,分类星座点,并减轻非线性.
- 在HCRF等分器内使用隐藏变量的统计概率分布进行减值纠正.
- 在OAM模式l=+2和l=+3.3中使用20 GBaud 3D-CAP-64信号进行实验.
主要成果:
- 与CNN等分器相比,HCRF等分器在7%的前向错误校正 (FEC) 门下提高了接收器灵敏度2dB (l=+2) 和1dB (l=+3).
- 计算复杂性比VNE减少了30%和比CNN等级器减少了41%.
- 拟议的等分器展示了优越的比特错误比率 (BER) 性能.
结论:
- 高频频率平衡器是缓解高速OAM-MDM光纤通信系统非线性扭曲的高效方法.
- 该HCRF方法在接收器灵敏度上提供了显著的改进,并大大降低了计算复杂度.
- 这种技术显示出在推进未来需要超高容量的光通信系统方面具有巨大的潜力.
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