基于MATLAB的数字滤波器设计与仿真
康恺
（陕西理工学院物电学院电子信息科学与技术专业08级1班，陕西 汉中 723001）
指导老师：蒋媛
【摘要】：数字滤波器是一个离散系统。该系统能对输入的离散信号进行处理，从而获得所需的有用信息。现
代数字滤波器的设计大体可以分为IIR和FIR两大类，可以用软件和硬件两种方法来实现，而选用MATAB信号处理工具箱为设计通用滤波器带来了极大的方便。本文按设计指标要求设计了滤波器，其中IIR采用巴特沃什，FIR采用布莱克曼窗进行设计，得出了与之对应的幅度响应曲线和相位响应曲线，最后对IIR和FIR的实现形式和性能等方面进行比较。
【关键词】：MATLAB；IIR数字滤波器；FIR数字滤波器；
MATLAB-based Digital Filter Design and Simulation
Abstract: The digital filter is a discrete system. The system can be able to handle
discrete signals. So it can achieve required important information. There are two major kinds of design principle of digital filter, which are finite impulse response (FIR) and infinite impulse response (IIR). The modern digital filter can be received by two kinds of method of software and hardware. But using MATLAB signal disposing tool case to design the digital filter is more convenient and universally applied. The main body of the paper is demanded to design a digital filter according to the designing index. IIR adopts Butterworth and FIR adopts the Blackman window to design the digital filter. Finally, carry out comparison on IIR and the FIR realization and function aspect.
Key words: MATLAB; IIR digital filter; FIR digital filter