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.
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.
作者
李志沛
王曦朔
刘博
张琦
忻向军
LI Zhi-pei;WANG Xi-shuo;LIU Bo;ZHANG Qi;XIN Xiang-jun(School of Electronic Engineering,Beijing University of Posts and Telecommunications,Beijing100876,China;Institute of Optoelectronics,Nanjing University of Information Science and Technology,Nanjing210044,China)
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2019年第3期79-82,126,共5页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(61727817,61835002)
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
probabilistic shaping
modulation format identification
quadrature amplitude modulation
fast Fourier transformation
