iir数字滤波器的仿真，其仿真软件是matlab,运用其中功能模块，FDATool和simulink-iir digital filter simulation, the simulation software is matlab, use one of function modules, FDATool and simulink

论文：基于matlab下的数字信号处理与仿真 关键词：仿真；数字滤波；matlab；SPtool；simulink-analyze the theory of IIR digital filter model in detial and realize the visual modeling and dynamic sumulation under MATLAB