激光技术2017，Vol.41Issue(1)：124-128,5.DOI:10.7510/jgjs.issn.1001-3806.2017.01.025
少模光纤通信系统中的自适应频域均衡算法
Adaptive frequency-domain equalization for few-mode fiber transmission systems
摘要
Abstract
Modal crosstalk and differential mode delay in mode-division multiplexing in few-mode fiber must be compensated for with adaptive equalization algorithm. For the purpose of decreasing complexity of adaptive equalization algorithm in long-haul few-mode fiber communication system, a multiple-input multiple-output equalizer with variable step-size frequency-domain-block least mean square(VS-FBLMS) algorithm was proposed to uncouple a 2×2 mode-division multiplexing system. Compromising the conflicting requirements of convergence speed and convergence performance, FBLMS adaptive algorithm was employed to update equalizer taps and modify step-size factor with variable step-size function. Furthermore, the algorithm decreased the computational complexity by using fast Fourier transform. In a 112Gbit/s high-speed communication simulation system over 1000km in few-mode fiber, signal Q2 factor increased 3. 7dB with same convergence speed. The performance of the algorithm was tested on field programmable gate array with a 100km few mode fiber communication system. The study demonstrates that the algorithm successfully uncouples the signals of mode-division multiplexing system and realizes fast convergence and low disorder.关键词
光通信/变步长-频域块最小均方算法/频域均衡/少模光纤/模式复用Key words
optical communication/variable step-size frequency-domain-block least mean square ( VS-FBLMS) algorithm/frequency-domain equalization/few-mode fiber/mode-division multiplexing分类
信息技术与安全科学引用本文复制引用
黄战华,王云立,李桂芳,张珊..少模光纤通信系统中的自适应频域均衡算法[J].激光技术,2017,41(1):124-128,5.基金项目
国家九七三重点基础研究发展计划资助项目(2014CB340100) （2014CB340100）
