[毕业设计] 一种椭圆带通IIR数字滤波器设计 [复制链接]

资料简介：
毕业设计 一种椭圆带通IIR数字滤波器设计  共23页，9336字
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，被广泛应用于语音图象处理、数字通信、谱分析、模式识别、自动控制等领域。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。数字滤波器是指完成信号滤波处理的功能，用有限精度算法实现的离散时间线性非时变系统，其输入是一组(由模拟信号取样和量化的)数字量，其输出是经过变换的另一组数字量。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。同时DSP(数字信号处理器)的出现和FPGA的迅速发展也促进了数字滤波器的发展，并为数字滤波器的硬件实现提供了更多的选择。
IIR数字滤波器是数字滤波器中非常重要的一类虑波器，因其可以较低的阶次获得较高的频率选择特性而得到广泛应用。本文研究了IIR数字滤波器的常用设计方法，在分析各种IIR实现结构的基础上，利用MATLAB针对并联型结构的IIR数字滤波器做了多方面的仿真，从理论分析和仿真情况确定了所要设计的IIR数字滤波器的实现结构以及中间数据精度。
关键词： 数字滤波器  无线单位冲激响应   MATLAB
Abstract: At present, we are in the digital era, digital signal processing technology by the people’s attention, along with its theory and algorithms of computer technology and micro-electronics technology has been rapid development has been widely used in image processing voice, digital Communications, spectral analysis, pattern recognition, automatic control and other areas. Digital filter digital signal processing is the most important part of almost all in the digital signal processing systems. Digital filter is the completion of the signal processing functions of filtering, with limited accuracy algorithm of discrete-time non-linear time-varying systems and their input is a set (by the analog signal sampling and quantitative) figures, its output is a transformation The volume of a different set of figures. As opposed to analog filters, digital filters do not drift, to deal with low-frequency signal, the frequency response characteristics can be made very close to the ideal characteristics, and can reach very high precision, easy integration, which determines the advantages of digital filter applications More and more. At the same time, DSP (digital signal processor) and the emergence of the rapid development of the FPGA also promoted the development of the digital filter, and hardware implementation of digital filters to provide more choice.
IIR digital filter in the digital filter is very important to consider a class of wave, because of their lower-order can be obtained at a higher frequency selectivity and widely used. In this paper, the IIR digital filter design methods commonly used in the analysis of the realization of IIR structure on the basis of MATLAB for the use of parallel structure of the IIR digital filter has done a wide range of simulation, from the theoretical analysis and simulation to determine the circumstances to be IIR digital filter designed to achieve the accuracy of the data structure as well as in the middle.
Key words:  digital filter     Wireless unit impulse response    MATLAB
1 IIR滤波器理论分析设计    5
1.1 IIR数字滤波器基本理论    5
1.2 IIR数字滤波器的幅频特性    7
1.3 IIR数字滤波器的相频特性    8
1.4 IIR数字滤波器的实现结构    8
1.4.1直接型结构    8
1.4.2 级联型结构    9
1.4.3 并联型结构    10
2 IIR数字滤波器分析设计    11
2.1 IIR数字滤波器的性能指标要求    11
2.2 IIR数字滤波器常用设计方法介绍    11
2.2.1 S-Z变换…………………………………………………………………………11
2.2.2标准Z变换    12
3 椭圆带通IIR滤波器设计以及MATLAB工具箱仿真    14
3.1 椭圆带通IIR数字滤波器的MATLAB设计    14
3.2 椭圆带通IIR数字滤波器的相频特性与群时延分析    15
3.2.1 椭圆带通IIR滤波器的相频特性分析    15
3.2.2 椭圆带通IIR滤波器的群时延分析    17
3.3 椭圆带通IIR数字滤波器的稳定性分析与设计    18
3.3.1 椭圆带通IIR滤波器的稳定性分析    18
3.3.2 椭圆带通IIR滤波器的稳定性设计    19
3.4 椭圆带通IIR数字滤波器的量化精度设计    20
3.4.1输入量化精度    20
3.4.2系数量化精度    21
4 椭圆带通IIR数字滤波器的MATLAB程序及仿真图    21
5 总结    22
参考文献    23

资料文件预览：
共1文件夹，1个文件，文件总大小：501.00KB，压缩后大小：376.44KB

• 毕业设计-一种椭圆带通IIR数字滤波器设计
• 滤波器课程设计.doc  [501.00KB]