基于频率采样法的FIR数字滤波器仿真与实现

数字滤波器是由数字乘法器、加法器和延时单元组成的一种装置。其功能是对输入离散信号的数字代码进行运算处理,以达到改变信号频谱的目的。本文首先分析了频率采样法,得到了FIR数字滤波器的相关技术指标,最后利用频率采样法实现了一个带阻FIR数字滤波器的相关设计,并且在MATLAB中完成了FIR数字滤波器的相关仿真。

Digital filter is a device composed of digital multiplier,adder and delay unit.Its function is to process the digital code of input discrete signal to change the signal spectrum.This paper first analyzes the frequency sampling method,obtains the relevant technical specifications of FIR digital filter,and finally realizes the correlation design of a band stop FIR digital filter by using frequency sampling method,and completes the correlation simulation of FIR digital filter in MATLAB.