function output=upsample(input);
%use this one you moron!!

for i=1:length(input)
   output((i-1)*3+1)=input(i);
   output((i-1)*3+2)=0;
   output((i-1)*3+3)=0;
   output((i-1)*6+4)=0;
   output((i-1)*6+5)=0;
   output((i-1)*6+6)=0;
   
   end