r.m

this file consists of many matlab programs

%linear block code

disp('enter value of n,k');
n=input('enter coefficient of n= ');
k=input('enter value of k= ');
disp('enter value of parity matrix');
fprintf('order of parity matrix P=%d x %d\n',k,n-k);
p=input('enter parity matrix P \n');
disp(p);
G=[eye(k),p];
disp('generator matrix=');
disp(G);

m=input('enter message word k= ');
for i=1:1:n-k
   code(1,i)=0;
   for j=1:1:k
       code(1,i) = rem((code(1,i) + m(1,j)*p(j,i)),2);
       
   end
   fprintf('\n\tcode%d = %d',i,code(1,i));
end;
disp('\t codeword is given as=');
   C=[m,code];
    disp(C);
    disp('\t decoding function strts ');
   
        [x,y]=size(p);
H = [p' eye(y)];
fprintf('The H matrix is\n');
disp(H);
h=H';
r= input('Enter the recieved codeword\n');
[u v]=size(h);
for i=1:1:v
   synd(1,i)=0;
   for j=1:1:u
       synd(1,i) = rem((synd(1,i) + r(1,j)*h(j,i)),2);
       
   end
   fprintf('\n\tsyndrome%d = %d',i,synd(1,i));
end
fprintf('\n The syndrome is \n');
disp(synd);