目录摘要………………………………………………………………………………………1Abstract……………………………………………………………………………………11引言……………………………………………………………………………………12OFDM系统介绍………………………………………………………………………32.1OFDM系统的基本原理…………………………………………………………32.2OFDM系统的基本模型……………………………………………………………52.3OFDM技术的应用领域……………………………………………………………62.4OFDM技术的优缺点………………………………………………………………73OFDM关键技术…………………………………………………………………………93.1时域和频域同步……………………………………………………………………93.2信道估计技术………………………………………………………………………93.3信道编码和交织…………………………………………………………………123.4降低均峰功率比…………………………………………………………………123.5均衡………………………………………………………………………………124基于Simulink的OFDM通信系统仿真及分析………………………………………124.1MATLAB/Simulink概述……………………………………………………………124.2OFDM通信系统实现……………………………………………………………134.3仿真结果分析……………………………………………………………………14结束语……………………………………………………………………………………17参考文献…………………………………………………………………………………17OFDM传输技术研究学生姓名：杨京学号：20095044048学院：物理电子工程学院专业：电子科学与技术指导教师：孙秋菊职称：讲师摘要：正交频分复用(OrthogonalFrequencyDivisionMultiplexing,OFDM)是一种高效的多载波宽带数字调制技术，是第四代移动通信技术的核心技术。由于其克服多径干扰、消除符号间干扰的能力强和频谱利用率高的优点，应用越来越广泛。本文首先概括性地介绍正交频分复用技术的发展史，然后重点研究了OFDM通信系统的基本原理并综合分析OFDM的优缺点，最后讨论了基于Simulink的OFDM通信系统的仿真及分析。本文的讨论与结论对准确理解和熟练应用OFDM传输技术有一定参考作用。关键词：正交频分复用；通信系统；仿真TheResearchofOFDMTransmissionTechnologyAbstract:OFDM(OrthogonalFrequencyDivisionMultiplexing,OFDM)isanefficientmulti-carrierbroadbanddigitalmodulationtechnology,whichisthecoretechniquesofthefourthgenerationtechnology.Foritsadvantagesofgoodresistanceofthefrequeneyselectivedecliningorclippinginterference,highspectrunefficiency,OFDMisappliedmoreandmoreextensively.Firstly,thedevelopmenthistoryofOFDMtechnologyisintroducedgenerallyinthistext.Secondly,thebasicprincipleandthekeytechnologyofOFDMcommunicationsystemarestudiedessentiallyaswellasitsadvantagesanddisadvantages.Finally,thesimulationandanalysisofOFDMcommunicationsystemarediscussed.ThediscussionandconclusionofaccurateunderstandingandskilledapplicationhavecertainreferencefunctiononOFDMtransmissiontechnology.Keywords:OrthogonalFrequencyDivisionMultiplexing；CommunicationSystem；Simulation1引言OFDM的英文全称