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相干光正交频分复用传输系统中的 无导频相位纠偏方法
引用本文:刘武,杨奇.相干光正交频分复用传输系统中的 无导频相位纠偏方法[J].光子学报,2014,40(12):1893-1898.
作者姓名:刘武  杨奇
作者单位:武汉邮电科学研究院 光纤通信技术和网络国家重点实验室, 武汉 430074
基金项目:国家重点基础研究发展计划(No.2010CB328300)资助
摘    要:提出了一种适用于16-QAM的新型相位纠偏方法,克服了基于M次方算法的传统相位纠错方法不适用于高阶正交振幅调制的缺点.该方法结合正交频分复用调制方式,无需导频即可完成相位盲估计,且计算量较少.本文基于112 Gb/s 1 040 km的相干光正交频分复用传输系统进行了算法验证,并与传统的4次方纠偏方法进行了比较,实验证明该算法适用于正交频分复用和16-QAM调制平台,相位纠偏结果显著优于基于导频的4次方算法.

关 键 词:正交频分复用  载波相位估计  正交振幅调制
收稿时间:2011-05-30

Carrier Phase Recovery Without Pilot Sub-carriers in Coherent Optical OFDM Transmission Systems
LIU Wu,YANG Qi.Carrier Phase Recovery Without Pilot Sub-carriers in Coherent Optical OFDM Transmission Systems[J].Acta Photonica Sinica,2014,40(12):1893-1898.
Authors:LIU Wu  YANG Qi
Institution:State Key Laboratory of Optical Communication Technologies and Networks, Wuhan Research Institute of Post &|Telecommunication, Wuhan 430074, China
Abstract:Aiming at the shortcoming that the M-th power based traditional phase recovery method cannot be used for high-order QAM signal constellations, a carrier phase recovery method for 16-QAM constellations is presented. The proposed method is able to applied in CO-OFDM system to implement blind phase recovery with low computational cost. In the verification experiment, the method is used in 112 Gb/s 1 040 km CO-OFDM transmission, and its performance is compared to those using the fourth-power estimator. Experimental results indicate that the proposed method significantly outperform the fourth-power estimator.
Keywords:Orthogonal Frequency Division Multiplexing (OFDM)  Carrier phase estimation  Quadrature Amplitude Modulation (QAM)
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