{TAIL ~ The digital signals} are introduced to a digital carrier recovery loop and {HEAD ~ a digital symbol recovery loop} 
{ TAIL ~ The digital signals } are introduced to a digital carrier recovery loop and { HEAD ~ a digital symbol recovery loop }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD