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iir数字低通滤波器的设计与实现,iir数字低通滤波器的设计与实现1.28万字我自己的毕业论文，原创的，已经通过校内系统检测，仅在本站独家出售，重复率低，大家放心下载使用 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，被广泛应用于多种领域。数字滤波器是数字信号处理中最...
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IIR数字低通滤波器的设计与实现
1.28万字
我自己的毕业论文，原创的，已经通过校内系统检测，仅在本站独家出售，重复率低，大家放心下载使用
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，被广泛应用于多种领域。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。相对于模拟滤波器，数字滤波器没有漂移，能够处理低频信号，频率响应特性可做成非常接近于理想的特性，且精度可以达到很高，容易集成等，这些优势决定了数字滤波器的应用越来越广泛。本文概述了IIR 数字滤波器设计的一般方法和步骤，分析了数字滤波器的实现方法。介绍了一种实现IIR数字滤波器的设计的方法，分别利用脉冲响应不变法和双线性变换法，运用MATLAB编程设计IIR数字低通滤波器，并选择了三种混合波形对已经设计好的IIR数字低通滤波器进行滤波性能验证，结果显示滤波效果良好；IIR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广泛用途。本文结合IIR数字滤波器在图像处理中的实例，研究了基于MATLAB数字滤波器设计与仿真问题。对巴特沃斯数字低通滤波器在图像处理中的应用进行了实现，分别改变巴特沃斯低通滤波器的阶数，对不同阶数对滤波效果的影响进行了对比分析，从而得出了一些重要结论。巴特沃斯滤波器阶数不同，滤波效果也不一样，阶数越高，在阻频带振幅衰减速度越快。同样的滤波器，阶数越高值越均匀，滤波效果越好。
关键词： IIR数字低通滤波器 MATLAB 脉冲响应不变法 双线性变换法 图像处理
Design and implementation of IIR digital low pass filter
Abstract Currently we are in the digital era, digital signal processing technology has been widespread concern, with the development of the theory and algorithms of computer technology and microelectronics technology has been rapid development, has been widely used in many fields. The digital filter is part of digital signal processing, one of the most important, in almost all digital signal processing system. With respect to the analog filter, the digital filter does not drift to handle low-frequency signal, the frequency response characteristic can be made very close to the ideal characteristics, and can achieve a high precision, easy integration, determines the application of these advantages of digital filters more widely. This paper outlines the general approach and steps IIR digital filter, analyze the implementation method of the digital filter. Describes two methods to achieve IIR digital filter design, namely the use of impulse response method and bilinear transformation method, using MATLAB programming design IIR digital low-pass filter, and select three wave mixing has been designed for good IIR digital low-pass filter to filter the performance verification, the results show a good filter effect; IIR digital filter has many uses in speech, image, digital communication systems and signal processing in the computer field. In this paper, IIR digital filter in image processing examples studied based on MATLAB digital filter design and simulation problems. Butterworth low-pass filter in digital image processing were achieved, namely to change the order Butterworth low-pass filter, the effects of different filtering effect of the order to carry out a comparative analysis of the thus obtained Some important conclusions. Different order Butterworth filter, the effect of the filter is not the same. The lower the order of the filter is , the higher the filter order is, the faster the amplitude attenuated in the stop band . The same filter, the higher the value, the more uniform the order, the better filtering effect.
Keywords: IIR digital low-pass filter MATLAB Impulse response method Bilinear transformation method The image processing
目录
第一章 绪论 1
1.1数字滤波器的研究背景与意义 1
1.2数字滤波器的应用现状与发展趋势 2
1.3数字滤波器的定义和分类 3
1.4数字滤波器的实现方法分析 5
第二章 IIR数字低通滤波器的设计 6
2.1 IIR数字滤波器结构 6
2.2 IIR数字滤波器的设计过程 9
2.2.1用脉冲响应不变法设计IIR数字低通滤波器 9
2.2.2 用双线性变换法设计IIR数字低通滤波器 11
第三章IIR数字低通滤波器滤波器的MATLAB实现 14
3.1 MATLAB简介及优势 14
3.2 MATLAB在数字滤波器中常用命令及函数 15
3.3 基于MATLAB的IIR低通数字滤波器的设计步骤 16
第四章 IIR数字低通滤波器的综合设计与仿真 18
4.1 经典设计法设计IIR数字低通滤波器 18
4.2 IIR数字低通滤波器的设计与仿真 20
4.3 数字低通滤波器在图像处理中的设计及仿真 26
结论和展望 33
致谢 34
参考文献 35
1.28万字
我自己的毕业论文，原创的，已经通过校内系统检测，仅在本站独家出售，重复率低，大家放心下载使用
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，被广泛应用于多种领域。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。相对于模拟滤波器，数字滤波器没有漂移，能够处理低频信号，频率响应特性可做成非常接近于理想的特性，且精度可以达到很高，容易集成等，这些优势决定了数字滤波器的应用越来越广泛。本文概述了IIR 数字滤波器设计的一般方法和步骤，分析了数字滤波器的实现方法。介绍了一种实现IIR数字滤波器的设计的方法，分别利用脉冲响应不变法和双线性变换法，运用MATLAB编程设计IIR数字低通滤波器，并选择了三种混合波形对已经设计好的IIR数字低通滤波器进行滤波性能验证，结果显示滤波效果良好；IIR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广泛用途。本文结合IIR数字滤波器在图像处理中的实例，研究了基于MATLAB数字滤波器设计与仿真问题。对巴特沃斯数字低通滤波器在图像处理中的应用进行了实现，分别改变巴特沃斯低通滤波器的阶数，对不同阶数对滤波效果的影响进行了对比分析，从而得出了一些重要结论。巴特沃斯滤波器阶数不同，滤波效果也不一样，阶数越高，在阻频带振幅衰减速度越快。同样的滤波器，阶数越高值越均匀，滤波效果越好。
关键词： IIR数字低通滤波器 MATLAB 脉冲响应不变法 双线性变换法 图像处理
Design and implementation of IIR digital low pass filter
Abstract Currently we are in the digital era, digital signal processing technology has been widespread concern, with the development of the theory and algorithms of computer technology and microelectronics technology has been rapid development, has been widely used in many fields. The digital filter is part of digital signal processing, one of the most important, in almost all digital signal processing system. With respect to the analog filter, the digital filter does not drift to handle low-frequency signal, the frequency response characteristic can be made very close to the ideal characteristics, and can achieve a high precision, easy integration, determines the application of these advantages of digital filters more widely. This paper outlines the general approach and steps IIR digital filter, analyze the implementation method of the digital filter. Describes two methods to achieve IIR digital filter design, namely the use of impulse response method and bilinear transformation method, using MATLAB programming design IIR digital low-pass filter, and select three wave mixing has been designed for good IIR digital low-pass filter to filter the performance verification, the results show a good filter effect; IIR digital filter has many uses in speech, image, digital communication systems and signal processing in the computer field. In this paper, IIR digital filter in image processing examples studied based on MATLAB digital filter design and simulation problems. Butterworth low-pass filter in digital image processing were achieved, namely to change the order Butterworth low-pass filter, the effects of different filtering effect of the order to carry out a comparative analysis of the thus obtained Some important conclusions. Different order Butterworth filter, the effect of the filter is not the same. The lower the order of the filter is , the higher the filter order is, the faster the amplitude attenuated in the stop band . The same filter, the higher the value, the more uniform the order, the better filtering effect.
Keywords: IIR digital low-pass filter MATLAB Impulse response method Bilinear transformation method The image processing
目录
第一章 绪论 1
1.1数字滤波器的研究背景与意义 1
1.2数字滤波器的应用现状与发展趋势 2
1.3数字滤波器的定义和分类 3
1.4数字滤波器的实现方法分析 5
第二章 IIR数字低通滤波器的设计 6
2.1 IIR数字滤波器结构 6
2.2 IIR数字滤波器的设计过程 9
2.2.1用脉冲响应不变法设计IIR数字低通滤波器 9
2.2.2 用双线性变换法设计IIR数字低通滤波器 11
第三章IIR数字低通滤波器滤波器的MATLAB实现 14
3.1 MATLAB简介及优势 14
3.2 MATLAB在数字滤波器中常用命令及函数 15
3.3 基于MATLAB的IIR低通数字滤波器的设计步骤 16
第四章 IIR数字低通滤波器的综合设计与仿真 18
4.1 经典设计法设计IIR数字低通滤波器 18
4.2 IIR数字低通滤波器的设计与仿真 20
4.3 数字低通滤波器在图像处理中的设计及仿真 26
结论和展望 33
致谢 34
参考文献 35
