基于MATLAB的模拟滤波器的设计 毕业设计论文.doc

基于MATLAB的模拟滤波器的设计 摘 要 几乎在所有的工程技术领域中都会涉及到信号处理问题 ，滤波器作为信号处理的重要组成部分，已发展的相当成熟。本文介绍了滤波器滤波器的设计用MATLAB实现滤波器。此设计扩展性好，便于调节滤波器的性能，可以根据不同的要求在上加以实现滤波器MATLAB  MATLAB BASED DESIGN OF ANALOG FILTERS ABSTRACT In almost all areas of engineering and technology will be related to signal processing, signal processing filter as an important component of the development has reached a mature state. This paper introduces the principle of filter and filter analog filters, digital filter design method. Focuses on the design of analog filters and simulation.Analog filter system (including the Butterworth filter and Chebyshev filter) design principles and methods, and on this basis on the analog filters (including low-pass, high pass, band-pass, band-stop) design. On this basis, the use of virtual realization of analog filters MATLAB. Good scalability of this design, easy to adjust the performance of filters can be based on different requirements to be in the realization of MATLAB.Through the MATLAB simulation and realization of, we can see that the traditional design method of analog filters and do not intuitive red, and MATLAB with more stringent scientific computing and graphical display of the advantages of the design showed that the more intuitive, but also to filter accuracy has been greatly improved to better achieve the desired results. At the same time, low-pass analog filters of high pass, band-pass, band-stop conversion of a theoretical KEYWORD: Filtering, Analog filters, MATLAB 目 录 中文摘要 I 英文摘要 II 1 滤波器简介 1 1.1 滤波器的工作原理 1 1.1.1 模拟滤波器的工作原理 1 1.1.2 数字滤波器的工作原理 2 1.2 滤波器的基本特性 3 1.2.1 模拟滤波器与数字滤波器的基本特性 3 1.2.2 无限冲击响应IIR和有限冲击响应FIR滤波器 5 1.3 滤波器的主要技术指标 5 2 模拟滤波器的设计 6 2.1 模拟滤波器的设计方法 7 2.2 模拟原型滤波器及最小阶数的选择 8 2.2.1 巴特沃斯滤波器及最小阶数的选择 8 2.2.2 切比雪夫滤波器及最小阶数的选择 12 2.2.3 椭圆滤波器及最小阶数的选择 17 2.2.4贝塞尔滤波器 18 3 MATLAB仿真 18 3.1 MATLAB简介 18 3.2 对低通模拟滤波器的仿真 20 3.3 模拟高通滤波器的仿真 21 3.4 模拟带通滤波器的仿真 22 3.5 对带阻模拟滤波器的仿真 24 4 频率转换 25 4.1低通至高通的转换 25 4.2低通至带通的变换 26 4.3低通至带阻的变换 28 5 总结与展望 30 致 谢 31 参考文献 32