Coherent optical OFDM scheme with inter-carrier interference self-cancellation and common phase error compensation  

作　　者：吴毅凌 李巨浩 赵春旭 赵玉萍 张帆 陈章渊 

机构地区：[1]State Key Laboratory of Advanced Optical Communication Systems & Networks,Peking University

出　　处：《Chinese Optics Letters》2010年第7期634-638,共5页中国光学快报（英文版）

基　　金：supported by the National "973" Program of China (Nos. 2010CB328201 and 2010CB328202);the National Natural Science Foundation of China (Nos.60907030,60877045,60932004,and 60736003);the Scientific Research Foundation for the Returned Overseas Chinese Scholars

摘　　要：Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- gated. The purpose of our research is to counteract the impacts of laser phase noise and fiber nonlinearity. We propose two ICI self-cancellation-based CO-OFDM schemes, and adopt a pilot-aided decision feedback （DFB） loop for CPE compensation. The proposed schemes are compared with conventional CO-OFDM schemes at the same spectral efficiency. Simulations show that our schemes can not only enhance laser linewidth tolerance of the CO-OFDM system, but also present strong robustness against fiber nonlinearity.Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- gated. The purpose of our research is to counteract the impacts of laser phase noise and fiber nonlinearity. We propose two ICI self-cancellation-based CO-OFDM schemes, and adopt a pilot-aided decision feedback （DFB） loop for CPE compensation. The proposed schemes are compared with conventional CO-OFDM schemes at the same spectral efficiency. Simulations show that our schemes can not only enhance laser linewidth tolerance of the CO-OFDM system, but also present strong robustness against fiber nonlinearity.

关 键 词：Error compensation Frequency allocation Orthogonal functions Spectrum analyzers Telecommunication systems 

分 类 号：TN929.11[电子电信—通信与信息系统]