designhigherfilter.m

来自「DTMF编解码在MATLAB中的仿真（gui设计）」· M 代码 · 共 9 行

%DesignHigherFilter.m
function B=DesignHigherFilter(W0)
fs=8000;
N=199;
k=2*pi/fs;
Bandwidth=110;
wc1=(W0-Bandwidth/2)*k;
wc2=(W0+Bandwidth/2)*k;
B=fir2(N,[0,wc1/pi,wc2/pi,1],[0,1,1,0]);