ideal_hp.m

来自「FIR数字滤波器的设计方法主要是建立在对理想滤波器频率特性作某种近似的基础上的。」· M 代码 · 共 19 行

function hd=ideal_hp1(Wc,N)

%compute the ideal highpass fiter unit pulse respondence hd(n)

%wc: cutoff frequency

%N: window length

%hd: unit pulse respondence

alpha=(N-1)/2;

n=0:1:N-1;

m=n-alpha+eps;

hd=[sin(pi*m)-sin(Wc*m)]./(pi*m);