概括
本研究介绍了一种低复杂度的电散预补偿 (EDC) 方案,使用集群辅助查找表 (CLUT) 进行强度调制直接检测 (IM-DD) 系统. 这种新方法显著降低了计算复杂性,使得更高容量距离产品成为可能.
科学领域:
- 光学通信是指光学通信的应用.
- 信号处理 信号处理
背景情况:
- 在强度调制直接检测 (IM-DD) 系统中,色色分散 (CD) 和直接检测容量限距离.
- 基于Gerchberg-Saxton (GS) 的电散预补偿 (pre-EDC) 提高了稳定性,但受到高计算复杂性的影响.
研究的目的:
- 为IM-DD系统提出一个新的,低复杂度的EDC前方案.
- 为了减少现有的非代FIR基础的EDC前系统的计算复杂性.
主要方法:
- 集群辅助查找表 (CLUT) 技术用表查找和积累取代卷积.
- 龙头重量被分组为每个集群中心建立LUT,平衡LUT数量和大小.
- 使用80 Gbit/s PAM-4和100 Gbit/s PAM-6信号在20公里标准单模光纤 (SSMF) 上进行实验示范.
主要成果:
- 消除了卷积中的乘法运算.
- 减少了PAM-4信号的加法时间58.54%,PAM-6信号的加法时间51.22%.
- 在7%的高清FEC值下实现性能,没有任何处罚.
结论:
- 拟议的基于CLUT的预EDC方案为提高IM-DD系统性能提供了一个实际的解决方案.
- 显著减少计算复杂性使得更高的数据速率和更长的传输距离成为可能.
- 该方法有效地减轻了色彩分散的影响,而不会降低性能.
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