AIR INSTITUTE OF ARTIFICIAL INTELLIGENCE AND ROBOTICS. XJTU 1986 N M bky(n-k)=> akx(n-k) k=0 IR滤波器 akz Y(Z H(2)=x(x)∑n2 k=0 k z=e Ja 数字信号处理简明教程InstItute of ArtIfIcIAl IntellIgence And robotIcs, XJtu 数字信号处理简明教程 1986 4 IIR滤波器 ( )