基于Matlab的频谱搬移(共2页).doc

精选优质文档-倾情为你奉上基于Matlab的频谱搬移%9-21R=0.005;t=-1.2:R:1.2;tao=2;x=rectpuls(t,tao);figure(1);plot(t,x);axis(-2 2 0 1);y=x.*cos(10*pi*t);%X=fourier(x);%Y=fourier(y);figure(2);subplot(2,2,1);plot(t,x);axis(-2,2,0,1.2)xlabel(t);ylabel(x(t);subplot(2,2,3);plot(t,y);xlabel(t);ylabel(y(t)=x(t)*cos(10*pi*t);W1=40;N=1000;k=-N:N;W=k*W1/N;X=x*exp(-j*t*W)*R;X=real(X);Y=y*exp(-j*t*W)*R;Y=real(Y);subplot(2,2,2);plot(W,X)xlabel(w);ylabel(X(