【正文】
DSP 課程設(shè)計(jì) 論文 I 摘 要 本論文首先介紹了濾波器的濾波原理以及數(shù)字濾波器的設(shè)計(jì)方法及過程。重點(diǎn)介紹了 FIR 數(shù)字濾波器的設(shè)計(jì)方法。即各種窗函數(shù)法和等效最佳一致逼近法。在此基礎(chǔ)上,用 DSP 虛擬實(shí)現(xiàn)任意階 FIR 數(shù)字濾波器。此設(shè)計(jì)擴(kuò)展性好,便于調(diào)節(jié)濾波器的性能,可以根據(jù)不同的要求在 DSP 上加以實(shí)現(xiàn)。 濾波是信號處理中最基本又極為重要的技術(shù),利用濾波器技術(shù)可以從復(fù)雜的信號中提取出所需要的信號,抑制不需要的信號。絕大多數(shù)傳感器輸出的信號,在使用過程中,都必須進(jìn)行濾波。所以濾波器是具有一定傳輸選擇特性的、對信號進(jìn)行加工處理的裝置、它允許輸 入信號中的一些成分通過,抑制或衰減另一些成分。其功能是將輸入信號變換為人們所需要的輸入信號。 本論文主要給出了 FIR 數(shù)字濾波器的設(shè)計(jì)方法和原理。 關(guān)鍵字 : DSP;濾波; FIR 數(shù)字濾波器 ; DSP 課程設(shè)計(jì) 論文 II Abstract This thesis introduced the design method and process of filtering of filter a principle and number filter first. Particularly introduced the design method of FIR number filter. Then the various window function method and etc. effect is the best to unanimously approach a method. On this foundation, carry out the rank FIR number with the DSP conjecture the filter is design expands sex well, easy to regulate the function of filter, can take into to carry out on DSP according to the different request. Filtering the wave is the most basic and extremely and important technique in the signal processing, making use of the filter technique can withdraw the signal that needs from the plicated signal and repress don39。t need of great majority spreads the feeling machine output39。s signal, in the process of using in, have to carry on filtering filter is have to definitely deliver choice characteristic, carry on to the signal process processed device, it to allow importation signal in of some positions pass and repress or the Shuai reduce a little bit another function is importation signal the transfor mation is the importation signal that people thesis mainly gave the design method and principle of FIR number filter. Keywords: DSP; Filter wave; FIR number filter; DSP 課程設(shè)計(jì) 論文 III 目 錄 摘 要 ...........................................................................................................................................I Abstract ..................................................................................................................................... II 目 錄 ........................................................................................................................................ III 第一章 緒論 ............................................................................................................................ 1 DSP 展 發(fā) 史 .................................................................................................................... 1 DSP 的基本特征 ............................................................................................................ 1 TMS320C54xx 的硬件結(jié)構(gòu) ........................................................................................... 2 C54X 的 CPU 體系結(jié)構(gòu) ..................................................................................... 2 指令緩沖單元 ( I) ............................................................................................ 3 程序流程單元 ( P) ........................................................................................... 3 地址程序單元 ( A) .......................................................................................... 3 數(shù)據(jù)計(jì)算單元 ( D) .......................................................................................... 4 DSP 的設(shè)計(jì) ................................................................................................................. 4 DSP 的設(shè)計(jì)特點(diǎn) ................................................................................................. 4 DSP 系統(tǒng)的設(shè)計(jì)流程 ......................................................................................... 5 第二章 FIR數(shù)字濾波器的簡介及基本原理 .......................................................................... 6 數(shù)字濾波器的簡介 ....................................................................................................... 6 FIR 數(shù)字濾波器的結(jié)構(gòu) ................................................................................................. 7 FIR 數(shù)字濾波器的特性 ................................................................................................. 9 FIR 數(shù)字濾波器的相位特性 ................................................................................. 9 線性相位 FIR 數(shù)字濾波器的幅度特性 ............................................................. 10 第三章 基于 MATLAB的 FIR數(shù)字濾波器設(shè)計(jì) ................................................................. 14 數(shù)字濾波器的設(shè)計(jì)方法描述 ..................................................................................... 14 常用窗函數(shù)及設(shè)計(jì)方法 ............................................................................................. 14 基于切比雪夫等效一致逼近法 ................................................................................. 19 FIR 數(shù)字濾波器的 MATLAB 設(shè)計(jì) .......................................................................... 20 用各種窗函數(shù)設(shè)計(jì) FIR 數(shù)字濾波器 ................................................................. 20 用 remez 函數(shù)設(shè)計(jì) FIR 數(shù)字低通濾波器 ......................................................... 22 應(yīng)用 FDATOOl 設(shè)計(jì) FIR 濾波器 ...................................................................... 26 第四章 FIR數(shù)字濾波器的 DSP實(shí)現(xiàn)( CCS 仿真) ........................................................... 30 CSS 的特點(diǎn) ............................................................................................................... 30 DSP 課程設(shè)計(jì) 論文 IV CCS 代碼生成工具及程序流程圖 ........................................................................... 30 CCS 集成開發(fā)環(huán)境的配置 ....................................................................................... 32 CCS 集成開發(fā)環(huán)境應(yīng)用(與 MATLAB 聯(lián)合仿真) ........................................... 33 第五章 參 考 文 獻(xiàn) ............................................................................................................ 42 DSP 課程設(shè)計(jì) 論文 1 第一章 緒論 DSP發(fā)展史 自 20世紀(jì) 70年代末 80年代初 DSP芯片誕生以來 DSP芯片得到了飛速的發(fā)展。 DSP產(chǎn)品的應(yīng)用己擴(kuò)大到人們的學(xué)習(xí)、