matlab 2.封装HPF 巴特沃斯高通滤波器
%x：待处理信号%fs：采样频率%wp;通带边界频率%ws:阻带边界频率%rp:Rp通带最大衰减(dB)%rs:Rs阻带最小衰减(dB)function y=HPF(x,fs,wp,ws,rp,rs)[n,w] = buttord(wp/(fs/2),ws/(fs/2),rp,rs);%确定阶数n和3dB截止频率[b,a] = butter(n,w,'high');%确定H(S)的分子分母系数向量[H,W] = freqz(b,a);%H即频率响应函数，W即数字角频率figure,plo
