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针对极端条件下光纤偏振光信号的偏振态旋转(Rotation of State of Polarization,RSOP)速度过快，以及本身存在的偏振模色散(Polarization Mode Dispersion,PMD)、残余色散、偏振相关损耗(Polarization Dependent Loss,PDL)、残余载波频率偏移(Carrier Frequency Offset,CFO)和载波相位噪声损伤(Carrier Phase Noise,CPN)严重影响通信质量的问题，提出一种基于多输入多输出系统盲均衡算法(Multiple Input Multiple Output-Constant Modulus Algorithm,MIMO-CMA)级联卡尔曼滤波器光纤信道损伤自适应均衡处理优化算法。首先，将包含各种光纤信道损伤的正交相移键控(Quadrature Phase Shift Keying,QPSK)信号使用MIMO-CMA完成残余色散与初步的偏振效应相关损伤均衡，再使用卡尔曼滤波器均衡残余的RSOP损伤、CFO及CPN。仿真结果表明，经过优化算法均衡后的输入信号，其星座图恢复效果良好，且能追踪的RSOP转速可以达到9 Mrad·s-1以上，有效降低了算法的计算复杂度。
Abstract：A cascaded Kalman filter fiber channel damage adaptive equalization processing optimization algorithm,which is based on the multiple input multiple output constant module algorithm(MIMO-CMA)is proposed to address the issues of excessive rotation of state of polarization(RSOP)speed,polarization mode dispersion(PMD),residual chromatic dispersion,polarization dependent loss(PDL),residual carrier frequency offset(CFO),and carrier phase noise(CPN)that seriously affect communication quality in extreme conditions of optical fiber polarized light signals.Firstly,the quadrature phase shift keying(QPSK)signal containing various optical fiber channel impairments is balanced using MIMO-CMA to achieve residual dispersion and preliminary polarization effect related impairments.Then,the Kalman filter is adopted to balance the residual RSOP damage,CFO,and CPN.Simulation results show that the constellation recovery effect of the input signal after the equalization of the optimization algorithm is good,and the trackable RSOP speed can reach over 9 Mrad·s-1,and can effectively reduce the computational complexity of the algorithm.
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基本信息:
DOI：10.13682/j.issn.2095-6533.2025.06.003
中图分类号:TN929.11
引用信息:
[1]赵尔乐,山蕊,丁洋.光纤信道损伤自适应均衡处理优化算法[J].西安邮电大学学报,2025,30(06):21-30.DOI:10.13682/j.issn.2095-6533.2025.06.003.
基金信息:
陕西省重点研发计划项目（2024GX-YBXM-100）