The background image is a coloured NB-LDPC matrix.The image is obtained by using the following Matlab code:
H= load('N576_K480_GF64_matrix.txt'); figure(1); colormap (colorcube(65)); H=mod(H,66); image(H); set(gca,'xtick',[]); set(gca,'ytick',[]); set(gca,'position',[0 0 1 1]); %axis off; %ylabel('H= ','Fontsize',30,'rotation',0); %colorbar;
The obtained image:
