ex41.m

数字信号分析处理方面的好教材,有DSP的MATLAB源程序.

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,y,'r',k,x1,'m')%,k,y2,'g',k,y1,'k')