毕业设计 基于MATLAB的IIR数字带通滤波器设计.doc

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 IIR MATLAB  MATLAB-Based Design of IIR Digital Filter Abstract Nowadays we are in the digital time, and the technology of digital signal processing has got extensive attention by people. Accompany with the development of technology of computer and microelectronics, the theory and arithmetic of digital signal processing develops quickly, Digital filters are extensively used in audio and video processing, digital communications, spectrum analysis, auto control, and so on. Digital filter is one of the most important parts of digital signal processing, and almost appears in all digital signal processing system. Digital filter is a basic arithmetic to speech and image processing，pattern recognition, and spectrum analysis．It plays a very important role in digital signal processing. This article states FIR digital filter’s designing thought, and introduces the realization process based on MATLAB by combination an example of band passing filter’s design. And correct result is obtained. Keywords Digital Filter IIR MATLA毕业设计说明书外文摘要  TOC \o 1-3 \u 1 绪论  PAGEREF _Toc264307742 \h 1 1.1 数字滤波器的优点  PAGEREF _Toc264307743 \h 2 1.2 数字滤波器的发展概况  PAGEREF _Toc264307744 \h 3 1.3 开发工具  PAGEREF _Toc264307745 \h 4 1.3.1 MATLAB软件简介  PAGEREF _Toc264307746 \h 4 1.3.2 MATLAB特点  PAGEREF _Toc264307747 \h 5 2 数字滤波器理???研究  PAGEREF _Toc264307748 \h 6 2.1 滤波器的设计  PAGEREF _Toc264307749 \h 6 2.2 数字滤波器的定义  PAGEREF _Toc264307750 \h 7 2.3 滤波器的设计步骤  PAGEREF _Toc264307751 \h 8 2.4 数字滤波器的类型  PAGEREF _Toc264307752 \h 8 2.5 滤波器的选择  PAGEREF _Toc264307753 \h 9 2.5.1 FIR和IIR数字滤波器的比较  PAGEREF _Toc264307754 \h 9 2.5.2 FIR或IIR滤波器