毕业设计说明书中文摘要基于MATLAB的IIR数字滤波器的设计摘要当前我们正处于数字化时代，数字信号处理技术受到了人们的广泛关注，其理论及算法随着计算机技术和微电子技术的发展得到了飞速的发展，被广泛应用于语音图象处理、数字通信、谱分析、模式识别、自动控制等领域。数字滤波器是数字信号处理中最重要的组成部分之一，几乎出现在所有的数字信号处理系统中。数字滤波是语音和图象处理、模式识别、谱分析等应用中的一个基本处理算法，在数字信号处理中，占有极其重要的地位。数字滤波器是数字信号处理中最重要的组成部分之一。文中阐述了IIR数字滤波器的设计思想，介绍了用MATLAB实现的过程，对数字滤波器的推广应用有一定的促进作用。关键词数字滤波器IIRMATLAB毕业设计说明书外文摘要MATLAB-BasedDesignofIIRDigitalFilterAbstractNowadaysweareinthedigitaltime,andthetechnologyofdigitalsignalprocessinghasgotextensiveattentionbypeople.Accompanywiththedevelopmentoftechnologyofcomputerandmicroelectronics,thetheoryandarithmeticofdigitalsignalprocessingdevelopsquickly,Digitalfiltersareextensivelyusedinaudioandvideoprocessing,digitalcommunications,spectrumanalysis,autocontrol,andsoon.Digitalfilterisoneofthemostimportantpartsofdigitalsignalprocessing,andalmostappearsinalldigitalsignalprocessingsystem.Digitalfilterisabasicarithmetictospeechandimageprocessing，patternrecognition,andspectrumanalysis．Itplaysaveryimportantroleindigitalsignalprocessing.ThisarticlestatesFIRdigitalfilter’sdesigningthought,andintroducestherealizationprocessbasedonMATLABbycombinationanexampleofbandpassingfilter’sdesign.Andcorrectresultisobtained.KeywordsDigitalFilterIIRMATLA1绪论..................................................................11.1数字滤波器的优点...................................................................................................................21.2数字滤波器的发展概况...........................................................................................................31.3开发工具...................................................................................................................................41.3.1MATLAB软件简介41.3.2MATLAB特点52数字滤波器理论研究62.1滤波器的设计.............................................................................................................................62.2数字滤波器的定义...................................................................................................................72.3滤波器的设计步骤.....................................................................................................................82.4数字滤波器的类型.....................................................................................................................82.5滤波器的选择.............................................................................................................................92.5.1FIR和IIR数字滤波器的比较92.5.2FIR或IIR滤波器的选取原则102.6数字滤波器的实现方法...........................................................................................................103IIR滤波器的设计113.1数字滤波器.................................................................................................................................113.2IIR数字滤波器设计方法.........................................................................................................123.2.1用脉冲相应不变法设计IIR数字滤波器133.2．2用双线性变换法设计IIR数字滤波器154IIR数字带通滤波器设计过...
