lj21.m

基于matlab的数字信号处理程序

n=0:1:15;
x=cos(0.48*pi*n)+cos(0.52*pi*n);
L=64;
y1=fft(x);
y2=fft(x,64);
subplot(1,2,1),plot(n/16,abs(y1));title('16点的幅频特性图');
subplot(1,2,2),plot(L/64,abs(y2));title('补零后的64点幅频图');