对IM/DD光学系统中非线性补偿的低复杂度三角形-内存-多项式决策反均衡器的实验演示
Optics express
|February 1, 2024
概括
我们推出了一种新的三角形-内存-多项式决策反等分器 (TMP-DFE),用于对抗光学系统中的非线性扭曲. 这种方法为高速强度调制直接检测 (IM/DD) 系统提供了更好的性能和更低的复杂性.
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:
- 强度调制直接检测 (IM/DD) 系统由于非线性扭曲而面临性能限制.
- 现有的等式化技术,如基于Volterra的方法,在计算上可能很复杂.
- 高速光学传输,如56-80 Gbit/s PAM-4,需要有效的信号完整性的解决方案.
研究的目的:
- 为IM/DD系统提出一种新且高性能的三角形-内存-多项式决策反均衡器 (TMP-DFE).
- 开发一个改进的版本,TMP-IWDFE,以减轻决策反中的错误传播.
- 评估这些方案的性能和复杂性与传统的均衡器相比.
主要方法:
- TMP-DFE在接收的样本上使用正弦和正弦运算,可以通过CORDIC算法实现加法和移位.
- 它有效地模拟奇数和偶数的非线性,具有可调节的非线性因子.
- TMP-IWDFE增强了决策反机制,以减少错误的传播.
主要成果:
- 在56-80 Gbit/s的PAM-4 IM/DD系统中,在30-50公里SSMF的实验结果显示,TMP-DFE在比特错误率 (BER) 中的性能优于V-DFE,DP-V-DFE和DPAT-V-DFE.
- 与传统方案相比,TMP-DFE需要的实际乘法要少得多 (20.04%-74.12%少).
- 与V-IWDFE,DP-V-IWDFE和DPAT-V-IWDFE相比,TMP-IWDFE表现出更高的性能和更低的复杂性.
结论:
- 拟议的TMP-DFE和TMP-IWDFE为IM/DD系统中的非线性扭曲提供了高性能和计算效率的解决方案.
- 这些方案为未来的高速,低成本光学传输系统提供了有希望的方法.
- 基于CORDIC的TMP-DFE实现有助于降低硬件复杂性.
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