x4.m

dsp学习中matlab试验源代码

n=0:8; 
m=0:15;
x=cos((pi/4)*n);   
close all       
subplot(2,1,1);stem(n,x);    title('X4(t)的序列图形');  
subplot(2,1,2); stem(m,abs(fft(x,16)))  ; title('X4(t)的序列16点的FFT');