电力光纤网中基于Viterbi的MLSE均衡器应用研究

Research on Application of MLSE Equalizer Based on Viterbi in Power Optical Fiber Network

针对电力光纤网中单模光纤的偏振模色散补偿器结构复杂、价格昂贵,以及色散综合效应造成的系统传输性能降低、误码率增加等缺点,文章提出了使用最大似然序列估计(Maximum Likelihood Sequence Estimation,MLSE)均衡器消除偏振模色散(Polarization Mode Dispersion,PMD)引起的码间串扰,利用最大似然序列估计和维特比(Viterbi)译码提高均衡器性能,降低误码率和算法复杂度。仿真结果表明,随着信噪比的增加,文章提出的方法可以有效去除PMD效应,提高系统的传输性能,基本恢复出原始信号。

Aiming at the complex structure and high cost of polarization mode dispersion（PMD） compensation, the decrease of system transmission performance and the increase of bit error rate caused by dispersion synthesis effect in the single mode fi ber of the power optical fi ber network, the maximum likelihood sequence estimation（MLSE） equalizer is used to eliminate inter-symbol interference, and the MLSE with Viterbi principle is used to improve the performance of the equalizer, which can effectively reduce the bit error rate and the complexity of algorithm. The simulation result shows that the proposed method can remove PMD effectively, improve the transmission performance of system and restore the original signal with the increase of PSNR well.