数字信号处理作业的程和仿真波形.docVIP

1、 n=0:10; x=[0,1,0,0,0,0,0,0,0,0,0]; stem(n,x); grid on line([0,10],[0,0],color,r); xlabel(n),ylabel(delta[n]); axis([0,10,-2,2]); 2、 n=0:10; x2=[0,0,0,0,1,1,1,1,1,1,1]; stem(n,x2); grid on ; line([0,10],[0,0],color,r); xlabel(n),ylabel(u[n]); axis([0,10,-2,2]); 3、 n=0:9; x3=[ones(1,8),0,0]; stem(n,x3); grid on ; line([0,9],[0,0],color,r); xlabel(n),ylabel(R8[n]); axis([0,9,-2,2]); 4、 A=3; n=-10:30; x4=A*sin(pi/5*n+pi/3); stem(n,x4); grid on ; line([-10,30],[0,0],color,r); line([0,0],[-5,5],color,r); xlabel(n),ylabel(sin[n]); axis([-10,30,-5,5]); 5、 n=0:9; x=[1,2,3,4,5,0,0,0,0,0]; stem(n,x); grid on line([0,9],[0,0],color,r); xlabel(n),ylabel(delta[n]); axis([0,9,-2,6]); 6、 n=0:9; x=[1,2,1,2,0,0,0,0,0,0]; stem(n,x); grid on line([0,9],[0,0],color,r); xlabel(n),ylabel(delta[n]); axis([0,9,-2,3]); 7、 n=0:9; x=[1,2,1,2,0,0,0,0,0,0]; stem(n,x); grid on line([0,9],[0,0],color,r); xlabel(n),ylabel(delta[n]); axis([0,9,-2,3]); x=[1,2,3,4,5,0,0,0,0,0]; m=2; n1=0:(length(x)-1); n2=0:(length(x)-1+m); x1=zeros(1,m+length(x)); for k=m+1:m+length(x) x1(k)=x(k-m); end; subplot(2,1,1),stem(n1,x); axis([-2,11,0,5]); grid; xlabel(n),ylabel(x[n]); subplot(2,1,2),stem(n2,x1); axis([-2,11,0,5]); grid; xlabel(n),ylabel(x1[n]); x=[1,2,1,2,0,0,0,0,0,0]; m=2; n1=0:(length(x)-1); n2=0:(length(x)-1+m); x1=zeros(1,m+length(x)); for k=m+1:m+length(x) x1(k)=x(k-m); end; subplot(2,1,1),stem(n1,x); axis([-2,11,0,3]); grid; xlabel(n),ylabel(x[n]); subplot(2,1,2),stem(n2,x1); axis([-2,11,0,3]); grid; xlabel(n),ylabel(x1[n]); x=[1,2,3,4,5,0,0,0,0,0]; y=fliplr(x); n1=0:9; n2=-fliplr(n1); subplot(2,1,1),stem(n1,x); axis([-10,10,-1,5]); grid; xlabel(n),ylabel(x[n]); subplot(2,1,2),stem(n2,y); axis([-10,10,-1,5]); grid; xlabel(n),ylabel(y[n]); x=[1,2,1,2,0,0,0,0,0,0]; y=fliplr(x); n1=0:9; n2=-fliplr(n1); subplot(2,1,1),stem(n1,x); axis([-10,10,-1,2]); grid