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