Non-Data-Aided Phase Noise Suppression Scheme for CO-OFDM Systems
Non-Data-Aided Phase Noise Suppression Scheme for CO-OFDM Systems
复制标题
DOI：
10.1109/lpt.2013.2272784
复制
发表时间：
2013-07
影响因子：
2.6
通讯作者：
Youngsun Ha;Wonzoo Chung
中科院分区：
文献类型：
--
作者：
Youngsun Ha;Wonzoo Chung
针对相干光正交频分复用（CO-OFDM）系统中高阶星座中零开销判决引导（DD）相位噪声抑制方法的局限性，提出了一种非数据辅助相位噪声补偿技术.所提出的技术包括两个均衡阶段。首先，一个盲自适应相位偏移恢复方案的基础上高阶静校正，称为色散最小化去旋转器，被施加到子载波符号，以实现粗校正的公共相位误差，因为相位噪声。其次，使用常规DD相位噪声校正方案来去除残余公共相位误差。仿真结果表明，该方法在不需要导频信号的情况下，可以有效地补偿相位噪声，尤其是高阶星座CO-OFDM系统。
We propose a non-data-aided phase noise compensation technique that overcomes the limitation of the zero-overhead decision-directed (DD) phase noise suppression method in high-order constellations for coherent optical orthogonal frequency division multiplexing (CO-OFDM) systems. The proposed technique consists of two equalization stages. First, a blind adaptive phase offset recovery scheme based on high-order statics, called the dispersion minimization de-rotator, is applied to subcarrier symbols to achieve rough correction of the common phase error because of phase noise. Second, the conventional DD phase noise correction scheme is used to remove the residual common phase error. The proposed method effectively compensates phase noise without the help of pilot signals, especially for high-order constellation CO-OFDM systems, as confirmed by our simulation results.