在带宽有限的信号中,具有选择性噪声去关系的Feedforward等效器
Optics express
|December 19, 2025
概括
一个新的选择性噪声去关系 (SND) 均衡器减轻了高速光学系统中的噪声增强. 这种具有成本效益的解决方案可以提高性能,而无需复杂的最大概率序列估计 (MLSE) 均等.
科学领域:
- 光学通信系统 光学通信系统
- 信号处理 信号处理
背景情况:
- 由于收发器带宽限制,高速光学传输系统面临性能限制.
- 线性平衡可以对抗符号间干扰 (ISI),但会放大高频噪声,降低接收器的性能.
- 传统的噪音白化方法通常需要计算密集的最大概率序列估计 (MLSE) 均等器.
研究的目的:
- 为高速光学传输引入一种新的选择性噪声去关系 (SND) 均衡器.
- 为了应对线性均等引起的噪声增强的挑战,而无需使用复杂的MLSE技术.
- 提供一个计算效率高的替代方案来减轻光学接收器中的噪声.
主要方法:
- 建议采用选择性噪声去关系 (SND) 均衡器,在线性均衡器之后以前方式运行.
- 基于噪声模式,SND等分器可以预测符号错误的可能性.
- 它只在必要时选择性地应用邻近噪声的加权平均值来确定相关性.
主要成果:
- 该SND等分器有效地纠正带宽限制和噪声增强引入的错误.
- 实验结果表明,与前和决策反等效器相比,其性能优越.
- 拟议的SND均衡器实现了与基于MLSE的方法可比的性能,计算复杂性大大降低.
结论:
- SND等分器为减轻光学系统中的噪声增强提供了可行和高效的解决方案.
- 它为成本敏感的应用程序提供了复杂的MLSE等级化的实用替代方案.
- 与PF-MLSE等分器相比,SND等分器只需要6.25%的计算负载.
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