IIR数字滤波器的设计毕业论文说明书….doc

2013届毕业设计说明书 IIR数字滤波器的设计 院 、 部： 电气与信息工程学院 学生姓名： 指导教师： 职称 讲师 专 业： 电子信息工程 班 级： 完成时间： 2013年5月28日  摘 要 在现代通信系统中，信号中经常混有各种复杂成分很多信号分析都是基于滤波器而进行的(FIR)数字滤波器和无限长冲激响应(IIR)数字滤波器。IIR数字滤波器实现的阶次较低，所用的存储单元较少，效率高，精度高，能够保留一些模拟滤波器的优良特性，应用。本文研究了IIR数字滤波器的常用设计方法即冲响应不变法和双线性变换法。在分析IIR的基础上，从理论分析确定了所要设计的IIR数字滤波器的实现。MATLAB函数语言编程Simulink工具仿真IIR数字滤波器信号处理图形界面来设计滤波器，并用FDATool模拟IIR数字滤波器处理信号在此基础上，。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MATLAB上加以实现。冲响应不变法双线性变换法In modern communication systems, Because often mixed with various signal complex components, So many signal analysis is based on filters, and the digital filter is realized through numerical computation, digital filters filter with high precision, stability and flexibility, dont exist. Digital filter according to its impulse response function and characteristics of the time can be divided into two kinds, namely the infinite impulse response (IIR) digital filter and finite impulse response (FIR digital filters). The order of realizing IIR filter is used, low and high efficiency less storage unit, high precision, and can keep some simulation characteristics of filter, so it is widely used. In this paper, the IIR digital filter design theory and methods used, that is, the same impulse response method and bilinear transformation method. In the analysis of IIR principle, based on theoretical analysis to establish the design of IIR digital filter method. Especially in the MATLAB signal processing to all areas of research toolbox personnel can easily for scientific research and engineering application. This paper introduces the concept of digital filter, classification and design requirements. Then using MATLAB language programming, Simulation of IIR digital filter with Simulink module ，with functions of signal processing FDATool graphical interface design of interface design filter, and FDATool analog signal processing IIR digital filter. On this basis, the use of GUI t