IIR数字滤波器设计与实现:掌握用双线性变换法设计IIR数字滤波器的方法,掌握由低通到高通﹑带通﹑带阻的频率变换方法,掌握Butterworth滤波器设计的原理。-IIR digital filter design and Implementation: master the use of the bilinear transform IIR digital filter design method master low to high pass, band-pass, band resis