聊城大学学报（自然科学版）2026，Vol.39Issue(3)：366-373,8.DOI:10.19728/j.issn1672-6634.2026010005
DP-CS-NFDM系统中频偏与偏振串扰的协同均衡方案
Synergistic equalization of frequency offset and polarization crosstalk in DP-CS-NFDM systems
摘要
Abstract
To address the issues of laser frequency offset and polarization crosstalk in dual-polarization con-tinuous-spectrum nonlinear frequency division multiplexing(DP-CS-NFDM)systems,we propose a syner-gistic equalization scheme of laser frequency offset and polarization crosstalk(SE-FO-PC).Based on the same short training sequence,this scheme simultaneously performs adaptive filter coefficient pre-updating and two-stage frequency offset estimation in the frequency and time domains,while incorporating a deci-sion-aided mechanism to optimize the filter coefficients,thereby effectively equalizing polarization crosstalk.Simulation results of 40 GHz DP-CS-NFDM system demonstrate that,with a laser linewidth of 100 kHz and a transmission distance of 1 440 km,the frequency offset estimation error of SE-FO-PC scheme remains below 1 MHz,demonstrating the broader applicability and higher estimation accuracy than the existing schemes.Furthermore,under a differential group delay of 180 ps,the proposed scheme requires only 3 burst training sequences to achieve polarization crosstalk equalization performance compara-ble to that of conventional schemes using 13 sequences,effectively enhancing the spectral efficiency of DP-CS-NFDM system.关键词
连续谱/非线性频分复用系统/频偏估计/偏振串扰均衡Key words
continuous spectrum/nonlinear frequency division multiplexing systems/frequency offset estimation/polarization crosstalk equalization分类
信息技术与安全科学引用本文复制引用
李旭升,许恒迎,许雅云,张义宁,杨立山,李晓政,庄聪豪..DP-CS-NFDM系统中频偏与偏振串扰的协同均衡方案[J].聊城大学学报（自然科学版）,2026,39(3):366-373,8.基金项目
国家自然科学基金项目(62371216,62101229,61501213) （62371216,62101229,61501213）
山东省自然科学基金项目(ZR2025MS1018,ZR2022MF253) （ZR2025MS1018,ZR2022MF253）
聊城大学博士科研启动基金(318051834,318051835)资助 （318051834,318051835）
