基于自适应步长ICA的CO-OFDM系统的偏振效应均衡研究

发布时间：2018-06-12 08:30

本文选题：偏振效应 + 独立成分分析(ICA)　；参考：《光电子·激光》2015年11期

【摘要】：提出一种基于自适应步长独立成分分析(ICA)法的信道均衡算法,用于相干光正交频分复用(CO-OFDM)系统偏振效应的补偿。基于50Gbit/s 16QAM CO-OFDM系统,偏振效应严重影响其系统传输性能。接收端在完成系统公共相位误差(CPE)补偿后,用本文所提算法对系统偏振效应进行盲均衡,根据每次迭代中信道频响分离矩阵的变化量自适应调整迭代步长,然后进行盲相互干扰(ICI)相位噪声补偿。仿真结果表明,本文算法的系统性能补偿效果接近于差分群延迟(DGD)为零时的系统性能,从而证明本文算法可以有效补偿偏振效应对高速光CO-OFDM系统性能的劣化。与固定步长ICA算法相比,本文算法能够极大地提高了迭代算法的收敛速度,极大地降低了算法复杂度。
[Abstract]:A channel equalization algorithm based on adaptive step size independent component analysis (ICA) method is proposed to compensate the polarization effect of coherent optical orthogonal frequency division multiplexing (OFDM) system. Based on 50Gbit / s 16QAM CO-OFDM system, the polarization effect seriously affects the transmission performance of the system. After the system common phase error (CPE) compensation is completed, the receiver uses the proposed algorithm to equalize the polarization effect of the system, and adaptively adjusts the iterative step size according to the variation of channel frequency response separation matrix in each iteration. Then the phase noise compensation of blind mutual interference (ICI) is carried out. The simulation results show that the performance compensation effect of the proposed algorithm is close to that of the differential group delay (DGD) of 00:00, which proves that the proposed algorithm can effectively compensate for the degradation of the polarization effect to the performance of high-speed optical CO-OFDM systems. Compared with the fixed-step ICA algorithm, the proposed algorithm can greatly improve the convergence speed of the iterative algorithm and greatly reduce the complexity of the algorithm.
【作者单位】：浙江工业大学信息工程学院;上海交通大学区域光纤通信网与新型光通信系统国家重点实验室;
【基金】：国家自然科学基金(60907032,61275124,61405178) 中国博士后基金(2013M540361) 浙江省自然科学基金(LY16F050009)资助项目
【分类号】：TN929.53

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