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//example 3.23<i>
//Find the convolution sum
clear ;
close ;
clc ;
t= -5:1/100:5;
for i =1: length (t)
if t(i) <0 then
h(i)=0;
x(i)=0;
else
h(i)=2^t(i);
x(i)=1;
end
end
y = convol (x,h) ;
//figure
f=scf(0);
plot2d (t,h)
xtitle ( ' Input Re spons e ' , ' t ' , ' h ( t ) ' );
xs2jpg(0, 'problem32-plot-a.jpg');
//figure
f=scf(1);
plot2d (t,x)
xtitle ( ' Input Re spons e ' , ' t' , ' x ( t ) ' );
xs2jpg(1, 'problem32-plot-b.jpg');
//figure
f=scf(2);
a= gca ();
t1 = -10:1/100:10;
plot2d (t1 ,y)
xtitle ( ' Output Re spons e ' , ' t ' , ' y ( t) ' );
xs2jpg(2, 'problem32-plot-c.jpg');
//example 3.23<ii>
//Find the response using convolution sum
clear ;
clc;
close ;
t = -5:1/100:5;
for i =1: length (t)
if t(i) <0 then
h(i)=0;
x(i)=0;
elseif t(i)<3 then
h(i)=0;
x(i)=1;
else h(i)=1;x(i)=1;
end
end
y = convol (x,h) ;
//figure
f=scf(0);
plot2d (t,h)
xtitle ( ' Input Re spons e ' , ' t ' , ' h ( t ) ' );
xs2jpg(0, 'problem33-plot-a.jpg');
//figure
f=scf(1);
plot2d (t,x)
xtitle ( ' Input Re spons e ' , ' t ' , ' x ( t ) ' );
xs2jpg(1, 'problem33-plot-b.jpg');
//figure
f=scf(2);
a= gca ();
t1 = -10:1/100:10;
plot2d (t1 ,y)
xtitle ( ' Output Re spons e ' , ' t ' , ' y ( t ) ' );
xs2jpg(2, 'problem33-plot-c.jpg');
//example 3.23<iii>
//Find the response using convolution sum
clear ;
close ;
clc ;
t = -5:1/100:5;
for i =1: length (t)
if t(i) <0 then
h(i)=0;
x(i)=0;
elseif t(i)<1 then
h(i)=0;
x(i)=1;
elseif t(i)<=4 then h(i)=1;x(i)=1;
elseif t(i)<=7 then
h(i)=0;
x(i)=1;
end
end
y = convol (x,h) ;
//figure
f=scf(0);
plot2d (t,h)
xtitle ( ' Input Re spons e ' , ' t ' , ' h ( t ) ' );
xs2jpg(0, 'problem34-plot-a.jpg');
// figure
f=scf(1);
plot2d (t,x)
xtitle ( ' Input Re spons e ' , ' t ' , ' x ( t ) ' );
xs2jpg(1, 'problem34-plot-b.jpg');
//figure
f=scf(2);
t1 = -10:1/100:10;
plot2d (t1 ,y)
xtitle ( ' Output Re spons e ' , ' t ' , ' y ( t ) ' );
xs2jpg(2, 'problem34-plot-c.jpg');
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