实验一 快速傅里叶变换及其应用(8)

xlabel('t/T'); ylabel('xb(n)');

title('a=0.1 f=0.0625') xk1=abs(fft(xb1)); subplot(3,2,2); stem(n,xk1) xlabel('k'); ylabel('Xb(k)');

title('a=0.1 f=0.0625') a=0.1;f=0.4375;

xb1=exp(-(a*n)).*sin(2*pi*f*n) subplot(3,2,3); plot(n,xb1,'-*'); xlabel('t/T'); ylabel('xb(n)');

title('a=0.1 f=0.4375') xk1=abs(fft(xb1)); subplot(3,2,4); stem(n,xk1) xlabel('k'); ylabel('Xb(k)');

title('a=0.1 f=0.4375') a=0.1;f=0.5625;

xb1=exp(-(a*n)).*sin(2*pi*f*n) subplot(3,2,5); plot(n,xb1,'-*'); xlabel('t/T'); ylabel('xb(n)');

title('a=0.1 f=0.5625') xk1=abs(fft(xb1)); subplot(3,2,6); stem(n,xk1) xlabel('k'); ylabel('Xb(k)');

title('a=0.1 f=0.5625')