To implement convolution of two Digital Signals > Matlab

To implement convolution of two Digital Signals > Matlab

Digital Signal Processing

%Convolution

clear all

x=input('Enter x :');

h=input('Enter h :');

m=length(x);

n=length(h);

X=[x,zeros(1,n)];

H=[h,zeros(1,m)];

for i=1:n+m-1

Y(i)=0;

for j=1:m

if(i-j+1>0)

Y(i)=Y(i)+X(j)*H(i-j+1);

else

end

end

end

x

h

Y

subplot(3,1,1);

stem(x);

title('First Signal');

subplot(3,1,2);

stem(h);

title('Second Signal');

subplot(3,1,3);

stem(Y);

title('Convolution of Two Signals');

% OUTPUT :

% Enter x :[2 2 2]

% Enter h :[1 2 3 2 1]

%

% x =

%

%      2     2     2

%

%

% h =

%

%      1     2     3     2     1

%

%

% Y =

%

%      2     6    12    14    12     6     2

%