ex8p14.m

来自「关于数字信号处理的一些matlab例程」· M 代码 · 共 16 行

% Digital Filter Specifications:
wp=0.2*pi;      %        digital Passband freq in rad
ws=0.3*pi;      %        digital Stopband freq in rad
Rp=1;           %        Passband ripple in dB 
As=15;          %        Stopband attenuation in dB
% Analog Prototype Specifications:Inverse mapping for frequencies
T=1;            %          Set T=1
OmegaP=wp/T;    %          Prototype Passband freq
OmegaS=ws/T;    %          Prototype Stopband freq
% Analog Elliptic Prototype Filter Calculation:
[cs,ds]=afd_elip(OmegaP,OmegaS,Rp,As);
% ***Elliptic Filter Order=3
% Impulse Invariance transformation:
[b,a]=imp_invr(cs,ds,T);
[C,B,A]=dir2par(b,a);