The LPI and LPD features of spread spectrum allow transmission between users of a spread spectrum CDMA communications system without {HEAD ~ the existing users} of {TAIL ~ the mobile cellular system} experiencing significant interference 
The LPI and LPD features of spread spectrum allow transmission between users of a spread spectrum CDMA communications system without { HEAD ~ the existing users } of { TAIL ~ the mobile cellular system } experiencing significant interference
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH