【正文】
目 錄 摘 要 .............................................................................................................................................. 1 第 1 章 緒 論 ................................................................................................................................ 2 數(shù)字濾波器的研究背景與意義 ........................................................................................ 2 數(shù)字濾波器的應(yīng)用現(xiàn)狀與發(fā)展趨勢 ................................................................................ 2 數(shù)字濾波器的實(shí)現(xiàn)方法分析 ............................................................................................ 4 本章小結(jié) ............................................................................................................................ 4 第 2 章 數(shù)字濾波器的概述 ........................................................................................................... 5 數(shù)字濾波器的基本結(jié)構(gòu) .................................................................................................... 5 IIR 濾波器的基本結(jié)構(gòu) .............................................................................................. 5 FIR 濾波器的基本結(jié)構(gòu) .............................................................................................. 7 數(shù)字濾波器的設(shè)計(jì)原理 .................................................................................................... 8 濾波器的性能指標(biāo) ..................................................................................................... 9 IIR 數(shù)字濾波器的設(shè)計(jì)方法 ...................................................................................... 9 FIR 數(shù)字濾波器的設(shè)計(jì)方法 .................................................................................... 10 IIR 濾波器與 FIR 濾波器的分析比較 ........................................................................... 12 本章小節(jié) .......................................................................................................................... 13 第 3 章 基于 MATLAB 數(shù)字濾波器的算法設(shè)計(jì)及仿真 ............................................................... 14 用 FDATOOL設(shè)計(jì)數(shù)字濾波器 ........................................................................................... 14 FDATool 的介紹 ........................................................................................................ 14 帶通濾波器設(shè)計(jì)實(shí)例 ............................................................................................... 15 程序設(shè)計(jì)法 ...................................................................................................................... 16 SIMULINK仿真 .................................................................................................................... 18 本章小結(jié) .......................................................................................................................... 20 第 4 章 總結(jié) .................................................................................................................................. 22 濾波器功能、主要參數(shù)和分類總結(jié) .............................................................................. 22 濾波器 的 功能 ........................................................................................................... 22 濾波器 的主要參數(shù) ................................................................................................... 22 濾波器 的分類 ........................................................................................................... 22 設(shè)計(jì)心得和體會 .............................................................................................................. 23 參考文獻(xiàn) ........................................................................................................................................ 24 明德至善 博學(xué)篤行 摘 要 1 摘 要 本文分析了國內(nèi)外數(shù)字濾波技術(shù)的應(yīng)用現(xiàn)狀與發(fā)展趨勢,介紹了數(shù)字濾波器的基本結(jié)構(gòu),在分別討論了 IIR 與 FIR 數(shù)字濾波器的設(shè)計(jì)方法的基礎(chǔ)上,指出了 傳統(tǒng)的數(shù)字濾波器設(shè)計(jì) 方法 過程復(fù)雜 、 計(jì)算 工作量大 、 濾波特性調(diào)整困難 的不足, 提出了 一種利用 MATLAB信號處理工具箱( Signal Processing Toolbox)快速有效的設(shè)計(jì)由軟件組成的常規(guī)數(shù)字濾波器的設(shè)計(jì)方法。給出了使用 MATLAB 語言進(jìn)行程序設(shè)計(jì)和利用信號處理工具箱的 FDATool工具進(jìn)行界面設(shè)計(jì)的詳細(xì)步驟。利用 MATLAB 設(shè)計(jì)濾波器,可以隨時對比設(shè)計(jì)要求和濾波器特性調(diào)整參數(shù),直觀簡便,極大的減輕了工作量,有利于濾波器設(shè)計(jì)的最優(yōu)化。 本文還介紹了如何利用 MATLAB 環(huán)境下的仿真軟件 Simulink 對所設(shè)計(jì)的濾波器進(jìn)行模擬仿真。 關(guān)鍵詞 數(shù)字濾波器 ; IIR; FIR; Matlab Abstract This paper analyzes the situation of application and development of digital filter technology home and abroad。 It introduces the basic structure of a digital filter, discusses different design methods of FIR and IIR filter, and points out that the traditional design method of digital filter is not only plex but also of heavy workload, even adjustment of filtering parametrer is very difficult。 So it brings forwad another design method of digital filter which based on the Matlab software。 It introduces the use of MATLAB language program design and the signal processing toolbox of FDATool tool interface design the detailed steps。 Filter design using MATLAB, ready contrast filter design requirements and characteristics of adjustment parameters, simple and intuitive, greatly reduce the workload, is helpful for the optimization of filter design。 This paper also introduces how to use MATLAB environment simulation software Simul