提出了一种采用Matlab的数字滤波器设计工具箱FDATOOL快速有效设计ⅡR数字滤波器的方法,可实时调整滤波器的参数从而使滤波器的设计达到最优。概述了FDATOOL的使用方法,采用DSP Builder建立了实现模型,给出了基于FPGA的ⅡR数字滤波器的实现流程,并且在最后使用Simulink进行仿真,给出了仿真波形。 A fast and efficient method of designing ⅡR digital filter using FDATOOL, a digital filter design toolbox based on Matlab, is proposed. The filter parameters can be adjusted in real time to optimize the design of the filter. The usage of FDATOOL is described. The implementation model is established by using DSP Builder. The realization process of IIR digital filter based on FPGA is given. At the end of this paper, simulation is carried out by using Simulink, and the simulation waveform is given.