基于MATLAB的IIR数字滤波器设计，给出IIR数字滤波器参数和冲激响应，绘出它们的幅度和相位频响曲线，分析它们的特点和设计方法。-IIR digital filter design based on MATLAB, given the IIR digital filter parameters and the impulse response, plot the amplitude and phase of the frequency response curve, and analyze