一种采用光学相位分集接收技术的相干光正交频分复用远端接入系统

发布时间：2018-03-02 04:26

本文关键词： 相位调制光学相位分集相位估计相干光正交频分复用(CO-OFDM) 远端接入系统　出处：《光电子.激光》2014年02期 　论文类型：期刊论文

【摘要】：提出了一种采用基于光学相位分集接收技术实现远程相干光正交频分复用(CO-OFDM)信号的远程光接入方案,并进行了理论研究和仿真验证。在本方案中,没有使用色散补偿光纤(DCF)或者色散补偿模块(DCM)补偿光纤信道色散导致的负面效应,原因是CO-OFDM信号能有效抵抗传输过程中色度色散(CD)和偏振模色散(PMD)引起的负面效应。仿真结果表明,10Gbit/s CO-OOFDM信号在标准单模光纤(SMF-28)传输320km后,采用相位估计技术得到的OFDM电信号,其时域波形的相位抖动幅度更小;与采用光载波自提取技术接收相位调制COOFDM的方案进行比较,测试误差向量幅度(EVM)的结果表明,本文方案可以获得更好的COOFDM信号接收性能,星座图中星座点收敛更加紧凑,接收的CO-OFDM信号质量更高。
[Abstract]:In this paper, a remote optical access scheme based on optical phase diversity reception technology is proposed to realize remote coherent optical orthogonal frequency division multiplexing (OFDM) signals, and theoretical research and simulation are carried out. The dispersion compensation fiber DCF (DCF) or the dispersion compensation module (DCM) is not used to compensate for the negative effects caused by the dispersion of the fiber channel. The reason is that the CO-OFDM signal can effectively resist the negative effects caused by chromatic dispersion (CD) and polarization mode dispersion (PMD) during transmission. The simulation results show that the 10 Gbit / s CO-OOFDM signal is transmitted 320km after the standard single-mode fiber SMF-28), and the phase estimation technique is used to obtain the OFDM signal. Compared with the scheme using optical carrier self-extraction technique to receive phase modulation COOFDM, the test results show that the proposed scheme can obtain better reception performance of COOFDM signal. In the constellation diagram, the convergence of the constellation points is more compact and the quality of the received CO-OFDM signal is higher.
【作者单位】：重庆三峡学院电子与信息工程学院信号与信息处理重点实验室;
【基金】：国家自然科学基金(61107064) 2013年重庆高校创新团队建设计划(KJTD201320) 重庆市教委科学技术研究(KJ131116)资助项目
【分类号】：TN929.1

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