中国激光, 2017, 44 (6): 0606002, 网络出版: 2017-06-08
基于无约束频域均衡的模分复用系统解复用技术
Demultiplexing Technology for Mode Division Multiplexing System Based on Unconstrained Frequency-Domain Equalization
光通信 模分复用 最小均方算法 恒模算法 少模光纤 optical communications mode division multiplexing least mean square algorithm constant-modulus algorithm few-mode fiber
摘要
利用基于多输入多输出算法的无约束频域均衡(FDE)对6×6模分复用(MDM)系统进行解复用, 以消除模式耦合和差分模时延等损伤对信号的影响。分别用无约束频域最小均方(FD-LMS)算法和无约束频域恒模算法(FD-CMA)对MDM系统进行解复用, 验证了无约束FDE的解复用效果; 并将无约束FD-LMS算法及FD-CMA的均衡性能分别与有约束FD-LMS算法及FD-CMA进行对比。仿真结果显示, 无约束FDE的解复用性能与有约束FDE相近, 但其在计算复杂度方面优势明显。
Abstract
An unconstrained frequency-domain equalization (FDE) based on multi-input multi-output algorithm is proposed for demultiplexing of the 6×6 mode-division multiplexing (MDM) system. It is used for eliminating the effects of mode coupling and differential mode group delay (DMGD) on signal. To verify the effectiveness of unconstrained FDE for demultiplexing, the unconstrained frequency-domain least mean square (FD-LMS) algorithm and the unconstrained frequency-domain constant-modulus algorithm (FD-CMA) are used for the MDM system. Besides, the equalization performance of the unconstrained FD-LMS algorithm and the unconstrained FD-CMA are compared with the constrained FD-LMS algorithm and the constrained FD-CMA. Simulation results show that the demultiplexing performance of the unconstrained FDE is comparable with that of the constrained FDE. However, the unconstrained FDE has great advantage over the constrained FDE in computation complexity.
黄成斌, 胡贵军. 基于无约束频域均衡的模分复用系统解复用技术[J]. 中国激光, 2017, 44(6): 0606002. Huang Chengbin, Hu Guijun. Demultiplexing Technology for Mode Division Multiplexing System Based on Unconstrained Frequency-Domain Equalization[J]. Chinese Journal of Lasers, 2017, 44(6): 0606002.