Thus, the second packet synchronizing signal e is free of {HEAD ~ an occurrence} of an unwanted pulse in {TAIL ~ the first packet synchronizing signal a} 
in
Thus , the second packet synchronizing signal e is free of { HEAD ~ an occurrence } of an unwanted pulse in { TAIL ~ the first packet synchronizing signal a }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL