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

作　　者：黄成斌[1] 胡贵军[1] 

机构地区：[1]吉林大学通信工程学院,吉林长春130012

出　　处：《中国激光》2017年第6期246-253,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(61575078);吉林省科技发展计划(20140203009GX);吉林省发改委产业技术研究专项(2014Y087)

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。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.

关 键 词：光通信 模分复用 最小均方算法 恒模算法 少模光纤 

分 类 号：TN913.7[电子电信—通信与信息系统]