光通信技术2025，Vol.49Issue(5)：45-50,6.DOI:10.13921/j.cnki.issn1002-5561.2025.05.008
OQAM-DSM光通信系统中的信道估计与均衡方法研究
Research on channel estimation and equalization method in OQAM-DSM optical communication system
摘要
Abstract
To address the issue of slow convergence speed in channel estimation for offset quadrature amplitude modulation digital subcarrier multiplexing(OQAM-DSM)systems,a novel channel estimation and equalization method is proposed.This method designs a new type of pilot symbol that enables accurate estimation of dispersion under arbitrary polarization states.The estimated dispersion value is then used to preset the time delay for each subcarrier and the tap coefficients of the butterfly filter.Simulation results for 140 GBaud 16OQAM-DSM and experimental results for 40 GBaud 16OQAM-DSM demonstrate that the proposed method reduces the required number of filter taps to one-third of that required by conventional methods,shortens the convergence time to less than 20 ns,and improves the overall system performance after convergence.关键词
偏移正交幅度调制数字子载波复用/色散估计/蝶形滤波器/均衡/导频辅助Key words
offset quadrature amplitude modulation digital subcarrier multiplexing/dispersion estimation/butterfly filter/equa-lization/pilot-aided分类
信息技术与安全科学引用本文复制引用
邓昊,张子恒,郭婉桢,赵建..OQAM-DSM光通信系统中的信道估计与均衡方法研究[J].光通信技术,2025,49(5):45-50,6.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"珠江人才计划"青年拔尖人才项目(2019QN01X165)资助. （2019QN01X165）
