相干光正交频分复用系统偏振模色散研究  

Study on PMD for coherent optical orthogonal frequency division multiplexing system

作　　者：郝耀鸿[1] 王荣[2] 李玉权[3] 黄卫卫[1] 李波[1] 

机构地区：[1]军事体育进修学院,广东广州510502 [2]总参第63研究所,江苏南京210007 [3]解放军理工大学通信工程学院,江苏南京210007

出　　处：《电路与系统学报》2013年第1期47-52,共6页Journal of Circuits and Systems

基　　金：国家自然科学基金(60871075)

摘　　要：相干光正交频分复用系统(Coherent Optical Orthogonal Frequency Division Multiplexing,CO-OFDM)具有良好的色散抑制性能及简单有效的信号均衡算法,是近年来光传输领域的研究热点之一。偏振模色散严重影响高速传输,色散均衡复杂,计算负荷较大。文章介绍了一种基于偏振复用(Polarization Division Multiplexing,PDM)和偏振分集接收(Polarization Diversity Receiver,PDR)的CO-OFDM系统(MIMO CO-OFDM),可有效实抑制一阶PMD,并对系统信号传输机理及均衡算法以进行了数学分析。分析和仿真结果表明,在不需任何偏振控制器条件下,CO-OFDM系统可实现偏振光的不敏感接收,以10Gb/s的速率通过单模光纤传输800km,系统Q值保持在15dB以上。Coherent optical orthogonal frequency division multiplexing（CO-OFDM） has drawn significant attention in optical transmissions due to its resilience to fiber chromatic dispersion（CD） with computation efficiency.Polarization-mode-dispersion（PMD） greatly impairs conventional high-speed single-carrier systems.To improve the system performance,a MIMO CO-OFDM communication system based on polarization division multiplexing（PDM） and polarization diversity receiver（PDR） is presented and a joint channel estimation algorithm is proposed.With such a scheme,the effect of PMD to the transmission system is emphatically analyzed.Simulation validates the feasibility of the system model and algorithm.The result shows that the CO-OFDM system is extreme robustness to PMD,and the system performance is maintained above 15dB for 800km distance and speed of 10Gbit/s transmission through standard-single-mode fiber（SSMF） without any polarization controller（PC）.

关 键 词：相干光通信 正交频分复用 偏振模色散 

分 类 号：TN929.5[电子电信—通信与信息系统]