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学校名称学校英文名称毕业论文(设计)GRADUATIONTHESIS（DESIGN）（此处可放学校校徽）论文（设计）题目TitleOfThesis（Design）基于MUSIC算法的DOA估计分院（系别）Department专业Speciality班级Class论文（设计）作者AuthorofThesis（Design）论文完成日Date论文（设计）指导教师Advisor指导教师职称TheTitleofAdvisor**学校**届毕业论文设计基于MUSIC算法的DOA估计DOAestimationbasedonMUSICalgorithm作者：***学校名称**学校**届毕业论文设计基于MUSIC算法的DOA估计[摘要]阵列信号处理是信号处理领域内的一个重要分支，在近些年来得到了迅速发展。波达方向（DirectionofArrival，DOA）估计是阵列信号处理的一个重要的研究领域，在雷达、通信、声纳、地震学等领域都有着广泛的应用前景。在DOA估计的发展过程中，人们对高分辨DOA估计算法一直有很大的研究兴趣，并在这一领域取得了很多重要的进展。本文主要研究经典的多重信号分类（MultiplesignalClassification，MUSIC）算法。本文首先回顾了空间谱估计技术的发展过程及现状，比较详细的介绍了空间谱估计基础和DOA估计模型，研究了DOA估计中的MUSIC算法，给出了MUSIC算法的原理和步骤，并通过一些计算机仿真实验，得出了MUSIC算法的性能分析。最后做了全文总结，归纳了本文所做的工作和结论。[关键词]DOA估计阵列信号处理MUSIC算法**学校**届毕业论文设计DOAestimationbasedonMUSICalgorithm[Abstract]Arraysignalprocessingisanimportantbranchofthefieldofsignalprocessing,inrecentyearsithasbeendevelopingrapidly.Direction-of-arrival（DOA）estimationisoneoftheimportantresearchofarraysignalprocessing,whichhasfoundwideapplicationsinradar,communication,sonar,seismologyandotherfields.DuringthedevelopmentprocessofDOAestimation,high-resolutionDOAestimationtechniqueshavelongbeenofgreatresearchinterestandmanysignificantprogresseshavebeenmadeinthisfield.ThispapermainlystudiestheclassicalMultiple-signal-classification（MUSIC）algorithm.Thispaperfirstreviewedthedevelopmentprocessandthepresentsituationofthespatialspectrumestimation;AmoredetailedintroductiontothebasisofthespatialspectrumestimationandtothemodelofDOAestimation;StudiedtheMUSICalgorithmofDOAestimation,giventheMUSICalgorithm’sprinciplesandsteps;AndthroughanumberofcomputersimulationobtainedtheperformanceanalysisoftheMUSICalgorithm.Finallysummarizesallthemainworkandresultsofthewholedissertation.[Keywords]DOAestimationarraysignalprocessingMUSICalgorithm**学校**届毕业论文设计目录第一章绪论........................................................................................................................................11.1研究背景及意义....................................................................................................................11.2DOA估计发展概述...............................................................................................................21.3论文的主要工作及内容安排................................................................................................4第二章DOA估计基础知识..............................................................................................................52.1DOA估计原理.......................................................................................................................52.1.1空间谱估计的系统结构..............................................................................................52.1.2DOA估计的基本原理.................................................................................................62.2阵列信号DOA估计的常用方法..........................................................................................72.3影响DOA估计结果的因素..................................................................................................82.4MATLAB简介.......................................................................................................................92.5其他相关知识.......................................................................................................................10第三章MUSIC算法........................................................................................................................133.1MUSIC算法的提出.............................................................................................................133.2波达方向估计问题中的阵列信号数学模型.......................................................................133.3阵列协方差矩阵的特征分解...............................................................................................163.4MUSIC算法的原理及实现.................................................................................................173.5MUSIC算法的改进.............................................................................................................19第四章MUSIC算法的DOA估计仿真.........................................................................................214.1MUSIC算法的基本仿真.....................................................................................................214.2MUSIC算法DOA估计与阵元数的关系..........................................................................224.3MUSIC算法DOA估计与阵元间距的关系......................................................................224.4MUSIC算法DOA估计与快拍数的关系..........................................................................234.5MUSIC算法DOA估计与信噪比的关系..........................................................................244.6MUSIC算法DOA估计与信号入射角度差的关系..........................................................254.7信号相干时MUSIC算法与改进MUSIC算法的仿真比较............................................26第五章MUSIC算法在应用中存在的问题及解决措施................................................................295.1通道失配对算法的影响.......................................................................................................295.2干扰源数目欠估计和过估计对算法的影响...........................................................