PDM鄄PAM4短距离光传输IMDD系统-北京邮电大学学报.PDFVIP

2016年8月 北 京 邮 电 大 学 学 报 Aug.2016 第39卷 第4期 Journal of Beijing University of Posts and Telecommunications Vol.39 No.4 摇 摇 文章编号:1007鄄5321(2016)04鄄0045鄄05 DOI:10.13190/ j.jbupt.2016.04.009 PDM鄄PAM4 短距离光传输IM/ DD 系统 霍佳皓,摇 周摇 娴,摇 皇甫伟,摇 涂佳静,摇 闫凯丽 (北京科技大学 先进网络技术与新业务研究所,北京 100083) 摘要:为实现短距离光传输系统在低成本下提升速率的目标,提出了一种基于强度调制/ 直接检测的偏振复用4 阶 脉冲幅度调制光纤传输系统. 该系统结构简单,利用高效的数字信号处理算法,包括偏振态估计、混合偏振拍打噪 声消除、基于最小均方误差算法的自适应多入多出技术滤波,可实现稳定可靠的均衡解复用. 在 Matlab 和VPI软 件联合仿真平台上,对224 Gbit/ s PDM鄄PAM4 系统进行了仿真验证. 关摇 键摇 词:偏振复用;强度调制直接检测;4 阶脉冲幅度调制;短距离光传输 中图分类号:TN911郾22摇 摇 摇 摇 文献标志码:A PDM鄄PAM4 Short Reach Optical Communication in IM鄄DD System HUOJia鄄hao,摇 ZHOU Xian,摇 HUANG Fu鄄wei,摇 TUJia鄄jing,摇 YAN Kai鄄li (Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services,University of Science and Technology Beijing,Beijing 100083,China) Abstract:In order to satisfy the demand of short reach optical communication system with low cost for higher rate,an optical fiber transmission system was proposed based on intensity modulation and direct detection (IM/ DD) polarization division multiplexing 4 order pulse amplitude modulation (PDM 鄄 PAM4). The system蒺sstructureissimple. By utilizingtheeffectivedigital signalprocessing (DSP)algo鄄 rithm,including the station of polarization (SOP) estimation,mixed polarization beat interference (MP鄄 BI) elimination and adaptive multiple鄄input multiple鄄output (MIMO) filter based on least mean square (LMS)algorithm,itsstablity andreliablity can berealized. Finally inthe Matlab andVPI softwarejoint simulation platform,a224 Gbit/ s PDM 鄄PAM4 system was simulated and analyzed in detail. Key words:polarization division multiplexing;