光通信研究Issue(2)：5-7,54,4.DOI:10.13756/j.gtxyj.2018.02.002
CO-OFDM DWDM系统非线性容限的仿真研究
Simulation Study of Nonlinear Tolerance in CO-OFDM DWDM System
摘要
Abstract
In order to improve the optical transmission capacity,we present a super-channel system simulation platform based on Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM)system with 1 6 Quadrature Amplitude Modula-tion (16QAM)format and Dense Wavelength Division Multiplexing (DWDM).We use Optisystem software and Matlab soft-ware for co-simulation,and adopt the nonlinear separation model to control the addition of Four Wave Mixing (FWM)noise, and measure the Bit Error Rate (BER)by the Error Vector Magnitude (EVM).By considering the different Cyclic Prefixes (CP),combining multiplex intervals and channels,fiber power and other factor at different bit rates,we study the impact of FWM noise and the nonlinear tolerance of the system.The simulation results show that with the increase of CP,the BER de-creases first and then increases.It is also shown that the optimal value of CP is the 1/8 of the Fast Fourier Transform (FFT) window length.For new fiber-optic links,the nonlinear tolerance is better than conventional fiber links.关键词
相干光检测正交频分复用/密集波分复用/循环前缀/四波混频Key words
CO-OFDM/DWDM/cyclic prefix/FWM分类
信息技术与安全科学引用本文复制引用
许悦,杜建新,王中玥..CO-OFDM DWDM系统非线性容限的仿真研究[J].光通信研究,2018,(2):5-7,54,4.基金项目
江苏省高校自然科学研究面上项目(16KJB510033) （16KJB510033）
