Thus, {HEAD ~ the signal structure} and control algorithms result in {TAIL ~ a greatly reduced signal level range} at the base station/PBX to achieve high efficiency in a orthogonal CDMA system 
result in
Thus , { HEAD ~ the signal structure } and control algorithms result in { TAIL ~ a greatly reduced signal level range } at the base station / PBX to achieve high efficiency in a orthogonal CDMA system
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH