基于MATLAB的模拟滤波器的方案设计书.docVIP

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 1 引言 2 2.3.2模拟滤波器滤波器的工作原理 7 我们知道，模拟滤波器是对模拟信号实行线性滤波的一种线性时不变系统，如图1.1所示。在时域内，它的动态特性可以用系统的单位冲激函数的响应来描述，也就是该滤波系统在任何时刻对输入单位冲激信号=δ（t）的输出响应。这个函数从时域上反映了该滤波系统的传输特性。对于任意输入信号，系统的输出可以卷积表示： 7 2.4 滤波器的基本特性 9 2.4.1 模拟滤波器与数字滤波器的基本特性 9 2.4.2 无限冲击响应IIR和有限冲击响应FIR滤波器 11 2.5 滤波器的主要技术指标 12 1 引言 图象是人类社会活动中最常用的信息载体，我们总是设法延伸视觉功能，弥补视觉功能的不足，从图象中提取更多的信息。图象又是客观世界能量或状态以可视化形式在二维平面上的投影，是社会生活中最常见的一种信息媒体。它传递着物理世界的能量和事物状态的信息，是人类获取外界原始信息的主要途径。我们在生产、科研或日常生活中看到的场景图象，包含着物体的“大量”的信息，通过感觉、知觉、记忆、认知、有哪些信誉好的足球投注网站、形成概念，直到最终理解和识别视觉刺激。 传统的方法如利用光学或模拟电路对图象进行处理，如望远镜、显微镜、眼镜，照相机、电视