IM-DD 传输系统中的光多径干扰缓解算法

Jiahao Huo, Zhu Jin, Zuqing Zhu, Xiaoying Zhang, Shaonan Liu, Jianlong Tao, Huangfu Wei
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引用次数: 0

摘要

本文旨在提出 DA-M 和 RF-M 两种算法,以减少多径干扰(MPI)对强度调制直接检测(IM-DD)系统的影响,尤其是对四级脉冲幅度调制(PAM4)系统的影响。DA-M 通过对信号块进行平均来减少波动,RF-M 通过从信号块的平均值中减去相应块的判定值来估计 MPI,然后通过从相应的 MPI 估计值与加权因子的乘积中减去干扰信号来生成减少干扰的样本。本文首次提出将决策前的信号分离成多个块,这大大降低了 DA-M 和 RF-M 的复杂度。仿真结果表明,28 GBaud IM-DD 系统在线宽为 1e5 Hz、1e6 Hz 和 10e6 Hz 时的 MPI 噪声可以得到有效缓解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mitigation of optical multipath interference algorithms in IM-DD transmission system
This paper aimed to propose two algorithms, DA-M and RF-M, of reducing the impact of multipath interference (MPI) on intensity modulation direct detection (IM-DD) systems, particularly for four-level pulse amplitude modulation (PAM4) systems. DA-M reduced the fluctuation by averaging the signal in blocks, RF-M estimated MPI by subtracting the decision value of the corresponding block from the mean value of a signal block, and then generated interference-reduced samples by subtracting the interference signal from the product of the corresponding MPI estimate and then weighting factor. This paper firstly proposed to separate the signal before decision — making into multiple blocks, which significantly reduced the complexity of DA-M and RF-M. Simulation results showed that the MPI noise of 28 GBaud IM-DD system under the linewidths of 1e5 Hz, 1e6 Hz and 10e6 Hz can be effectively alleviated.
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