ideal_hp.m

FIR滤波器设计

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);