畢業(yè)論文----基于labview的fir數(shù)字濾波器的設(shè)計(jì)(已修改)
2024-11-24 01:06 本頁(yè)面
【正文】 I 摘 要 數(shù)字濾波器分為無(wú)限脈沖響應(yīng)數(shù)字濾波器 (IIR)和有限脈沖響應(yīng)數(shù)字濾波器 (FIR)，F(xiàn)IR 數(shù)字濾波器在語(yǔ)音、圖像、數(shù)字通信系統(tǒng)和計(jì)算機(jī)領(lǐng)域信號(hào)處理中有著廣泛的應(yīng)用。論文主要研究在 Labview 環(huán)境中實(shí)現(xiàn) FIR 數(shù)字濾波器的設(shè)計(jì)。 論文重點(diǎn)描述了 FIR數(shù)字濾波器的原理、方法、設(shè)計(jì)過(guò)程及窗函數(shù)法、頻率取樣法、切比雪夫逼近法等幾種常用的設(shè)計(jì)方法。分別采用窗函數(shù)法 、 頻率取樣法、切比雪夫逼近法 設(shè)計(jì) FIR數(shù)字濾波器，通過(guò)對(duì)幾種設(shè)計(jì)方法的比較，得出了各自的優(yōu)缺點(diǎn)。最后對(duì)在窗函數(shù)法下設(shè)計(jì)的 FIR數(shù)字濾波器 進(jìn)行了仿真，得出了正確的仿真圖形。 通過(guò)對(duì)實(shí)驗(yàn)的分析，說(shuō)明論文在幾種方法下有效地實(shí)現(xiàn)了 FIR 數(shù)字濾波器的設(shè)計(jì)，所設(shè)計(jì)的 FIR數(shù)字濾波器能有效地對(duì)含噪信號(hào)進(jìn)行濾波處理。 關(guān)鍵詞 ： FIR 數(shù)字濾波器； Labview；窗函數(shù)法；頻率采樣法；等波紋切比雪夫逼近法 II Abstract Digital filter are divided into infinity impulse response digital filter (IIR) and finite impulse response digital filter (FIR), FIR digital filters in phoics, image, digital munication system and in the field of puter signal processing in a wide range of applications. Thesis mainly realize Labview environment in the design of FIR digital filters. The paper describes the principle of FIR digital filters, methods, design process and window function method, frequency sampling method, chebyshev approximation method of several mon design method. The author window function method were used in several different window function including rectangular window, han ning window, Kaiser window, Blake mann window and frequency sampling method, chebyshev approximation method realizes the FIR digital filters and the conclusion that various methods of FIR digital filters the frequency response of graph, through the parison of several design method, it is concluded that the respective advantages and disadvantages. Finally in window function method to design of FIR digital filters under simulated, obtained the correct the simulation. Through the analysis of experiment in that paper, several methods efficiently implemented under the design of FIR digital filters, the design of FIR digital filters can effectively to signal with noise filtering processing. Keywords: FIR digital filters。 Labview。 window function method。 frequency sampling method 。 corrugated chebyshev approximation method 目 錄 第 1章 緒 論 ............................................................ 1 研究意義 ................................................................ 1 研究現(xiàn)狀及內(nèi)容 .......................................................... 1 本文章節(jié)安排 ............................................................ 2 第 2章 虛擬儀器介紹 ......................................................... 2 虛擬儀器的介紹及發(fā)展現(xiàn)狀 ................................................ 2 LABVIEW簡(jiǎn)介 .............................................................. 3 使用 LABVIEW 程序設(shè)計(jì)濾波器的優(yōu)點(diǎn) ........................................ 3 小結(jié) .................................................................... 3 第 3章 數(shù)字濾波器 原理 ....................................................... 4 數(shù)字濾波器的概念 ........................................................ 4 數(shù)字濾波器的定義和分類 .................................................. 4 數(shù)字濾波器的設(shè)計(jì)方法 ................................................... 5 FIR 數(shù)字濾波器的設(shè)計(jì)原理 ................................................ 5 窗函數(shù)法 ................................................................ 6 頻率采樣法 ............................................................. 7 等波紋切比雪夫逼近法 .................................................... 7 小結(jié) .................................................................... 9 第 4章 基于 LABVIEW 的數(shù)字濾波器的設(shè)計(jì) ....................................... 9 前言 .................................................................... 9 雙通信號(hào)源的設(shè)計(jì) ....................................................... 10 數(shù)字濾波器的設(shè)計(jì) ....................................................... 15 程序測(cè)試 ............................................................... 21 小結(jié)與心得體會(huì) ......................................................... 24 第 5章 總結(jié) ................................................................ 25 參考文獻(xiàn) ................................................................... 26 致 謝 .................................................................. 27 第 1 頁(yè) 共 27 頁(yè) 1 緒論 目前，數(shù)字濾波器廣泛應(yīng)用于各種數(shù)字信號(hào)處理系統(tǒng)中如在通信、圖像編碼、語(yǔ)音編碼、雷達(dá)等眾多領(lǐng)域中有著廣泛的應(yīng)用。在傳統(tǒng)
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