毕业设计（论文）-数字滤波器的仿真与设计精选.doc

编 号: 审定成绩： 重庆邮电大学 毕业设计（论文） 设计（论文）题目： 单 位（系别） ： 电子信息工程系 学 生 姓 名 ： 专 业 ： 班 级 ： 学 号 ： 指 导 教 师 ： 答辩组负责人 ： 填表时间：年月 重庆邮电大学教务处制数字滤波器的设计方法即在此基础上，用MATLAB实现IIR数字滤波器IIR滤波器设计主要内容包括：巴特沃思、切比雪夫模拟低通滤波器设计；脉冲响应不变法和双线性变换法的数字化变换方法；数字高通、带通和带阻滤波器的设计。而FIR滤波器是直接采用的数字式设计方法。针对FIR滤波器特征，首先介绍了其线性相位的实现条件，然后介绍了窗函数法和频率抽样法的设计方法。给出了使用MATLAB语言进行程序设计和仿真技术的详细步骤。本文的特点是可以随时对比设计要求和滤波器特性调整参数，直观简便，极大的减轻了工作量，有利于滤波器设计的最优化。 【关键词】数字滤波器 MATLAB IIR FIR ABSTRACT The traditional the design of the digital filter process is complicated, calculation workload is big, it is hard to adjust the filtering properties, affecting the use of it. This paper introduces a kind of the MATLAB environment IIR digital filter and FIR digital filters simulation method and design.And graphic interface design, so that readers a better understanding of the digital filter is introduced in this paper the characteristics. Filter in the actual signal processing are playing very important role. Any testing signals contain noise, and filter is remove the noise of the basic means ,FIR digital filters design methods, namely window function method, On this basis, the MATLAB IIR digital filter, Introduces the design of digital filter IIR traditional ideas and steps, and computer aided design method. With a digital bandpass filter as an example, the focus on the based on the MATLAB three means of realization of the filter: Simulation low-pass prototype,Appropriate simulation band-pass and direct prototype, For digital filters designed to bring new simulation method. The main contents include design IIR filter: Butterworth, Chebyshev simulation low-pass filter design. Digital qualcomm, bandpass filter and the design of with resistance, And FIR filters is directly used digital design method. According to characteristics of FIR filters, first introduced its linear phase condition to realize, And then introduced the window function method and frequency sampling design method. Using M