freqz_m.m

来自「《数字信号处理实验(MATLAB版)》这」· M 代码 · 共 8 行

%freqz_m.m
function [db,mag,pha,grd,w]=freqz_m(b,a);
[H,w]=freqz(b,a,1000,'whole');
H=(H(1:501))';w=(w(1:501))';
mag=abs(H);
db=20*log10((mag+eps)/max(mag));
pha=angle(H);
grd=grpdelay(b,a,w);