基于线型卡尔曼滤波器的双偏振并行载波相位恢复算法  

Dual-Polarization Paralleled Carrier Phase Recovery Algorithm Based on Linear Kalman Filter

作　　者：代亮亮 闫连山[1] 易安林[1] 盘艳 蒋林[1] 葛军 潘炜[1] 罗斌[1] Dai Liangliang;Yan Lianshan;Yi Anlin;Pan Yan;Jiang Lin;Ge Jun;Pan Wei;Luo Bin(Center for Information Photonics and Communications,Southwest Jiaotong University,Chengdu,Sichuan 610031,China)

机构地区：[1]西南交通大学信息光子与通信研究中心,四川成都610031

出　　处：《光学学报》2018年第9期85-92,共8页Acta Optica Sinica

基　　金：国家自然基金重点项目(61335005;61401378);国家杰出青年科学基金(61325023)

摘　　要：针对偏振复用16阶正交幅度调制(16QAM)传输系统(PDM-16QAM),基于线型卡尔曼滤波器,提出了一种计算复杂度更低、线宽容忍度更高的双偏振并行载波相位恢复算法,使用两个偏振态内环和外环的符号信息对两个偏振态同时进行相位噪声估计。仿真结果表明,在传输速率为224Gb/s传输速率下,本文算法相比于单偏振卡尔曼滤波器算法的线宽容忍度提高了7倍,由原来的400kHz提高至2800kHz。此外,相比于单偏振卡尔曼滤波器载波相位恢复算法,本文算法并行处理符号个数提升了4倍左右,有效提高了算法的实时性,但是复杂度有所降低。最后,在传输速率为224Gb/s的PDM-16QAM传输实验中对本文算法进行了验证。A dual-polarization paralleled carrier phase recovery algorithm with better linewidth tolerance and lower computational complexity is presented for polarization division multiplexing and 16-order quadrature amplitude modulation（PDM-16 QAM）system based on linear Kalman filter（LKF）.The symbols in first and third rings of two polarizations are used to perform phase noise estimation.The simulation results for PDM-16 QAM system with the transmission rate of 224 Gb/s demonstrate that the linewidth tolerance of dual-polarization LKF is about seven times of that of single-polarization LKF.The linewidth tolerance is improved to 2800 kHz from 400 kHz.The dualpolarization LKF processes about four times symbols in one block than single-polarization LKF,which reduces the algorithm computational complexity and enhances the real-time performance.Finally,the proposed algorithm is verified in the transmission experiment of PDM-16 QAM system with the transmission rate of 224 Gb/s.

关 键 词：信号处理 载波相位恢复 卡尔曼滤波器 偏振复用 

分 类 号：TN929.11[电子电信—通信与信息系统]