1、 I 摘摘 要要 数字滤波器分为无限脉冲响应数字滤波器(IIR)和有限脉冲响应数字滤波器(FIR)， FIR 数字滤波器在语音、图像、数字通信系统和计算机领域信号处理中有着广泛的应用。 论文主要研究在 Labview 环境中实现 FIR 数字滤波器的设计。 论文重点描述了 FIR 数字滤波器的原理、方法、设计过程及窗函数法、频率取样法、 切比雪夫逼近法等几种常用的设计方法。分别采用窗函数法、频率取样法、切比雪夫逼近 法设计 FIR 数字滤波器，通过对几种设计方法的比较，得出了各自的优缺点。最后对在窗 函数法下设计的 FIR 数字滤波器进行了仿真，得出了正确的仿真图形。 通过对实验的分析，说明论
2、文在几种方法下有效地实现了 FIR 数字滤波器的设计，所 设计的 FIR 数字滤波器能有效地对含噪信号进行滤波处理。 关键词关键词：FIR 数字滤波器；Labview；窗函数法；频率采样法；等波纹切比雪夫逼近法 II Abstract Digital filter are divided into infinity impulse response digital filter (IIR) and finite impulse response digital filter (FIR), FIR digital filters in phonetics, image, digital comm
3、unication system and in the field of computer 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 sam
4、pling method, chebyshev approximation method of several common 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
5、 realizes the FIR digital filters and the conclusion that various methods of FIR digital filters the frequency response of graph, through the comparison of several design method, it is concluded that the respective advantages and disadvantages. Finally in window function method to design of FIR digi
6、tal 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 目目 录录 第 1 章 绪 论 1 1.1 研究意义 1 1.2 研究现状及内容 1 1.3 本文章节安排 2 第
