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首页> 外文期刊>Journal of Lightwave Technology >Compensation of Chromatic Dispersion and Nonlinear Phase Noise Using Iterative Soft Decision Feedback Equalizer for Coherent Optical FBMC/OQAM Systems
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Compensation of Chromatic Dispersion and Nonlinear Phase Noise Using Iterative Soft Decision Feedback Equalizer for Coherent Optical FBMC/OQAM Systems

机译：使用迭代软判决反馈均衡器进行色散和非线性相位噪声的补偿，用于相干光学FBMC / OQAM系统

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摘要

In this article, we propose an iterative soft decision feedback (ISDF) equalizer to compensate for the chromatic dispersion and nonlinear phase noise effects in 30-Gbaud coherent optical filter bank multicarrier with off-set quadrature amplitude modulation (FBMC/OQAM) system. Conventional optical FBMC/OQAM system usually uses a 1-tap zero-forcing equalizer per subcarrier to combat the inter-symbol interference (ISI) caused by the chromatic dispersion (CD) in optical fiber. However, residual ISI and inter-carrier interference (ICI) still remain in the system and have significant impact on the system performance. To overcome this problem, a new ISDF N-tap frequency sampling (FS) equalizer is proposed to jointly mitigate the residual ISI and ICI which permits a better trade-off between performance and complexity. Simulation results show that, the proposed technique is capable of suppressing the interference more effectively than using only 1-tap equalizer. The feedback branch of the proposed ISDF equalizer can be exploited further to compensate for the nonlinear effect of the optical fiber. With compensation of linear and nonlinear impairments the proposed technique acts as a backpropagation method for optical FBMC/OQAM system.
机译：在本文中，我们提出了一种迭代软判决反馈（ISDF）均衡器，以补偿30-GBaud相干滤光器组多载波中的色散和非线性相位噪声效应，具有空间正交幅度调制（FBMC / OQAM）系统。传统的光学FBMC / OQAM系统通常使用每个子载波的1分接零强制均衡器来打击由光纤中的色散（CD）引起的符号间干扰（ISI）。然而，残留的ISI和载体间干扰（ICI）仍然存在于系统中，并对系统性能产生重大影响。为了克服这个问题，提出了一种新的ISDF N-TAP频率采样（FS）均衡器，以共同减轻剩余ISI和ICI，这允许性能和复杂性之间具有更好的权衡。仿真结果表明，所提出的技术能够比使用仅使用1分接均衡器更有效地抑制干扰。所提出的ISDF均衡器的反馈分支可以进一步利用以补偿光纤的非线性效果。随着线性和非线性损伤的补偿，所提出的技术充当光学FBMC / OQAM系统的反向慢化方法。

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