{HEAD ~ The soft scaling factors} are applied to {TAIL ~ the initial symbol estimates} to generate the soft estimates 
are applied to
{ HEAD ~ The soft scaling factors } are applied to { TAIL ~ the initial symbol estimates } to generate the soft estimates
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH