butterh.m

来自「使用Matlab实现了FIR与IIR滤波器」· M 代码 · 共 14 行

function [ output_args ] = Untitled8( input_args )
%UNTITLED8 Summary of this function goes here
%  Detailed explanation goes here
ft=22050;
Wp =2*5000/ft;
Ws = 2*4800/ft;
Rp = 1;
Rs = 100;
[N,Wn] = buttord(Wp,Ws,Rp,Rs);
[b,a] = butter(N,Wn,'high');
[h,w]= freqz(b,a);
plot (w/pi,20*log10(abs(h)));grid;
xlabel('w/pi'); ylabel('Gain, dB');
title('Type Butter highpass Filter');