{HEAD ~ Z transform calculations} may be used to {TAIL ~ encode carrier signal independent data} to a digital sample stream 
used to
{ HEAD ~ Z transform calculations } may be used to { TAIL ~ encode carrier signal independent data } to a digital sample stream
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH