光通信技术2026，Vol.50Issue(4)：110-114,5.DOI:10.13921/j.cnki.issn1002-5561.2026.04.017
超奈奎斯特相干光通信系统中的盲载波相位恢复方法
Blind carrier phase recovery methods for Faster-than-Nyquist coherent optical communication systems
摘要
Abstract
To address the issue where controlled inter-symbol interference introduced by Faster-than-Nyquist(FTN)technology degrades carrier phase recovery(CPR)performance,this paper systematically compares the applicability of four methods in FTN systems:modified blind phase search,modified Kullback-Leibler divergence,Kalman filtering,and principal component phase estimation(PCPE).It focuses on analyzing the mechanism by which PCPE adapts to FTN signals without requiring modi-fication.A 50 GBaud FTN digital multi-band system is established for simulation and experimental verification.The results indi-cate that PCPE achieves optimal performance in the presence of FTN-induced ISI,with an optimal compression factor of 0.91.In bandwidth-limited scenarios,the FTN system based on PCPE requires approximately 2 dB less optical signal-to-noise ratio(OSNR)than the traditional Nyquist system to achieve bit error rate(BER)of 1×10-2.关键词
超奈奎斯特/码间串扰/数字多频带/载波相位恢复/主成分相位估计Key words
Faster-than-Nyquist/intersymbol interference/digital multi-band/carrier phase recovery/principal component phase estimation分类
信息技术与安全科学引用本文复制引用
邓昊,李一飞,赵建..超奈奎斯特相干光通信系统中的盲载波相位恢复方法[J].光通信技术,2026,50(4):110-114,5.基金项目
国家重点研发计划项目(2022YFB2903002)资助 （2022YFB2903002）
国家自然科学基金项目(U23A20282)资助 （U23A20282）
广东省自然科学基金项目(2024A1515010384)资助 （2024A1515010384）
广东省"珠江人才计划"青年拔尖人才项目(2019QN01X165)资助. （2019QN01X165）
