基于LMS的自适应滤波器的设计毕业设计

目录插图清单............................................................................................................................................................I摘要...........................................................................................................................................................IIAbstract...........................................................................................................................................................III第一章自适应滤波器..................................................................................................................................11.1数字滤波器.....................................................................................................................................11.2自适应滤波器的结构...................................................................................................................2第二章LMS算法..........................................................................................................................................42.1LMS算法简介...............................................................................................................................42.2LMS算法原理介绍......................................................................................................................42.3LMS算法的实现..........................................................................................................................72.3.1基本的LMS算法的实现................................................................................................82.3.2归一化LMS算法的实现..............................................................................................102.3.3功率归一化LMS算法的实现......................................................................................112.4仿真结果分析..............................................................................................................................13结论.........................................................................................................................................................14参考文献.........................................................................................................................................................15致谢.........................................................................................................................................................16附录.........................................................................................................................................................17铜陵学院毕业论文(设计)I插图清单图1-1数字滤波器.............................................................................................................1图1-2自适应滤波器的一般结构.....................................................................................2图2-1自适应横向滤波器的原理框图.............................................................................4图2-2LMS算法流程图...................................................................................................7图2-3LMS（基本）算法滤波效果图............................................................................9图2-4LMS（基本）算法相关参数图............................................................................9图2-5LMS（归一化）算法滤波效果图......................................................................10图2-6LMS（归一化）算法相关参数图......................................................................11图2-7LMS（功率归一化）算法滤波效果图..............................................................12图2-8LMS（功率归一化）算法相关参数图..............................................................12熊伟：基于LMS的自适应滤波器的设计II摘要在信号处理领域中，有一很重要内容就是自适应信号处理，说到自适应信号处理，自然想到其中重要的一部分：自适应滤波器。自适应滤波理论是自适应信号处理的基础，在信号处理学科的体系当中，这是非常重要的部分。40几年以来，该理论在科学界一直受到高度的重视，并且也经过科学家们的不断努力，使其的得到了发展与完善。如今，高速信号处理芯片日新月异，而高性能的计算机也不断的被开发出来，这就为自适应滤波器提供了发展的平台，也为它的应用提供了方便。可以这样说，自适应滤波理论正在日益受到人们的重视。如今自适应信号处理中研究课题有很多，而其中自适应滤波算法的研究是其中最为活跃的。在信息处理领域中，滤波是一项非常重要的技术。本文主要阐述了基于LMS自适应滤波器的设计方法，设计了三种LMS算法程序，并进行了对比分析，并运用MATLAB软件对自适应滤波器的设计进行了设计，编程。关键词：LMS；自适应滤波器；MATLAB。铜陵学院毕业论文(设计)IIIAbstractInthefieldofsignalprocessing,hasaveryimportantcontentistheadaptivesignalprocessing,adaptivesignalprocessing,naturallythinkofsomeimportantpart:theadaptivefilter.Adaptivefiltertheoryisthebasisofadaptivesignalprocessing,thesignalprocessinginthesystem,whichisaveryimportantpart.Since40years,thetheoryinthescientificcommunityhasbeenbroughttotheattentionoftheheight,andalsothroughtheconstantefforts,scientistshaveobtainedthedevelopmentandimprovementtomakeit.Today,rapidprogressinhigh-speedsignalprocessingchip,andhighperformancecomputerhasbeendeveloped,itprovidesadevelopmentplatform,theadaptivefilterandconvenienceisprovidedfortheapplicationofit.Itcanbesaidthattheadaptivefilteringtheoryareincreasinglybroughttotheattentionofthepeople.Nowtheresearchtopicinadaptivesignalprocessinghasalotof,andtheadaptivefilteringalgorithmisoneofthemostactiveresearch.Inthefieldofinformationprocessing,filteringisaveryimportanttechnology.ThisarticlemainlyexpoundsthedesignmethodbasedonLMSadaptivefilter,process,threekindsofLMSalgorithmisdesignedan