ex41.bak

来自「数字信号分析处理方面的好教材,有DSP的MATLAB源程序.」· BAK 代码 · 共 11 行

k=[1:1:1000];
x1=sin(2*pi*5*k*0.001);
x2=sin(2*pi*50*k*0.001);
x=x1+x2;
b=fir1(50,0.001);
%freqz(b,1,50000);
%y=filter(b,1,x);
%y1=filtfilt(b,1,x);
y2=fftfilt(b,x);
plot(k,x,'b',k,y2,'r',k,x1,'c')%,k,y2,'m')