| 一种适用于概率成形光传输系统的调制格式识别方法 |
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| 引用本文： | 李志沛,王曦朔,刘博,张琦,忻向军.一种适用于概率成形光传输系统的调制格式识别方法[J].北京邮电大学学报,2019,42(3):79-82,126. |
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| 作者姓名： | 李志沛 王曦朔 刘博 张琦 忻向军 |
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| 作者单位： | 北京邮电大学 电子工程学院,北京,100876;南京信息工程大学 物理与光电工程学院,南京,210044 |
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| 基金项目： | 国家自然科学基金项目（61727817，61835002） |
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| 摘 要： | 针对使用概率成形技术和高阶调制格式的变速率光传输系统，提出了一种基于四次方特征值的盲调制格式识别方法.该方法利用接收端信号经过四次方运算后的快速傅里叶变换（FFT）峰值和方差值，能够实现偏振复用概率成形高阶调制格式的精确识别.在联合仿真平台上搭建了高速长距离相干光传输系统，验证了新方法的有效性.
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| 关 键 词： | 概率成形 调制格式识别 正交幅度调制 快速傅里叶变换 |
| 收稿时间： | 2019-01-24 |
A Modulation Format Identification Method for Probabilistic Shaping Optical Transmission System |
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| LI Zhi-pei,WANG Xi-shuo,LIU Bo,ZHANG Qi,XIN Xiang-jun.A Modulation Format Identification Method for Probabilistic Shaping Optical Transmission System[J].Journal of Beijing University of Posts and Telecommunications,2019,42(3):79-82,126. |
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| Authors: | LI Zhi-pei WANG Xi-shuo LIU Bo ZHANG Qi XIN Xiang-jun |
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| Affiliation: | 1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2. Institute of Optoelectronics, Nanjing University of Information Science and Technology, Nanjing 210044, China |
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| Abstract: | A blind modulation format identification method based on fourth-power eigenvalues is proposed for variable-rate optical transmission systems employing probabilistic shaping technology and high-order modulation formats. By using the fast Fourier transformation (FFT) peak value and variance after the received signal passes through fourth-power operation, accurate identification of high order modulation formats with probabilistic shaping and polarization multiplexing can be realized. A high-speed long-haul coherent optical transmission system is built on the platform of the joint simulation to verify the effectiveness of the method. |
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| Keywords: | probabilistic shaping modulation format identification quadrature amplitude modulation fast Fourier transformation |
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