The base station also has an antenna, and spread {HEAD ~ spectrum detectors} for recovering {TAIL ~ message data} communicated from the remote units 
for recovering
The base station also has an antenna , and spread { HEAD ~ spectrum detectors } for recovering { TAIL ~ message data } communicated from the remote units
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH