function [out,IX_IL] = interleaving(input)

[K,D,N,G,N_t,N_r,L,C]= header;

% out = zeros(1,2*N*D);
% out(1,1:2*(N*D-2)) =  code;


[temp,IX_IL] = sort(rand(1,2*(D*N)));


out = input(1,IX_IL);