自适应多维度的无栅格光传输系统中关键问题研究

项目名称： 自适应多维度的无栅格光传输系统中关键问题研究

项目编号： No.61307086

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 刘博

作者单位： 北京邮电大学

项目金额： 26万元

中文摘要： 无栅格光传输系统以其动态的频谱划分和灵活的资源配置，成为未来光通信系统的热点研究领域，多维度调谐与自适应机制是该系统的关键。动态的链路损伤需要频谱结构、传输速率、调制格式与FEC的多维度协同补偿；光接收机需要一套自适应机制实现对无栅格光信号的动态匹配；而密集的载波间隔与可调谐光源的大频偏问题需要新的数字均衡算法。 本申请基于对多变量可控的信号自适应理论，将研究自适应多维度的无栅格光传输模型，综合分析无栅格光传输信号与传输信道的作用机理，实现准时变光链路损伤补偿与多维度优化体系；提出基于符号前导和自适应分级调制的无栅格光信号发射/接收方法，包括研究光前导符号的识别特性与自适应分级调制光信号的产生机理；研究基于时域滤波和连续相位编码的数字均衡算法，搭建自适应多维度的无栅格光传输系统实验平台，为发展未来灵活、可重构的光传输系统确立新的准则，具有重要的理论与实用意义。

中文关键词： 无栅格光传输；自适应；频偏纠正；；

英文摘要： The gridless optical transmission system is a hot research field due to its dynamic spectral division and flexible resource allocation, in which the multi-dimensional tuning and self-adaptive scheme are two key points. The dynamic link impairment requires the multi-dimensional collaborative compensation among spectrum, speed, modulation format and FEC. Second, the optical receiver needs a self-adaptive mechanism to match the changing optical signal. Meanwhile, the density of optical carriers and their big frequency offset require new digital signal processing algorithm. Bases on the parameter-controlled signal self-adaptive theory, this application will first study the self-adaptive multi-dimensional gridless optical transmission model; we will analyze the mechanism between the gridless optical signal and transmission channel, and realize the impairment compensation of quasi-time changing optical link as well as optimization of multi-dimensional model; we will propose the transmit/receive method of gridless optical signal based on symbol leading and self-adaptive hierarchical modulation, including the identification of optical leading symbol and the generation of self-adaptive hierarchical modulated optical signal; we will also study the digital compensation and estimation mechanism of time-domain filtering and

英文关键词： gridless optical transmission；self-adaption；correction of frequency offset；；