▁population ▁was ▁not ▁reported . ▁ ▁References ▁▁ ▁Category : Pop ulated ▁places ▁in ▁Y az d ▁County <0x0A> </s> ▁Space - div ision ▁multiple ▁access ▁( SD MA ) ▁is ▁a ▁channel ▁access ▁method ▁based ▁on ▁creating ▁parallel ▁spatial ▁pip es ▁( f oc used ▁signal ▁be ams ) ▁using ▁advanced ▁anten na ▁technology ▁next ▁to ▁higher ▁capacity ▁pip es ▁through ▁spatial ▁multiple x ing ▁and / or ▁divers ity , ▁by ▁which ▁it ▁is ▁able ▁to ▁offer ▁superior ▁performance ▁in ▁radio ▁multiple ▁access ▁communication ▁systems ▁( where ▁multiple ▁users ▁may ▁need ▁to ▁use ▁the ▁communication ▁media ▁simultaneously ). ▁In ▁traditional ▁mobile ▁cell ular ▁network ▁systems , ▁the ▁base ▁station ▁has ▁no ▁information ▁on ▁the ▁position ▁of ▁the ▁mobile ▁units ▁within ▁the ▁cell ▁and ▁radi ates ▁the ▁signal ▁in ▁all ▁directions ▁within ▁the ▁cell ▁in ▁order ▁to ▁provide ▁radio ▁coverage . ▁This ▁method ▁results ▁in ▁was ting ▁power ▁on ▁transm issions ▁when ▁there ▁are ▁no ▁mobile ▁units ▁to ▁reach , ▁in ▁addition ▁to ▁causing ▁inter ference ▁for ▁adjacent ▁cells ▁using ▁the ▁same ▁frequency , ▁so ▁called ▁co - channel ▁cells . ▁Like wise , ▁in ▁reception , ▁the ▁anten na ▁receives ▁signals ▁coming ▁from ▁all ▁directions ▁including ▁noise ▁and ▁inter ference ▁signals . ▁By ▁using ▁smart ▁anten na ▁technology ▁and ▁differ ing ▁spatial ▁locations ▁of ▁mobile ▁units ▁within ▁the ▁cell , ▁space - div ision ▁multiple ▁access ▁techniques ▁offer ▁attract ive ▁performance ▁enh anc ements . ▁The ▁radiation ▁pattern ▁of ▁the ▁base ▁station , ▁both ▁in ▁transmission ▁and ▁reception , ▁is ▁adapted