municatetowirelessmodemsatfixedbasestationsusingalimitedamountofradiofrequency(RF),ortoawidebandmicrowavelink,andrelayedtomobileswitchingcenters(MSC),work(PSTN).municationsfromthePSTNaresenttothebasestation,(FDMA),ess(TDMA),ess(CDMA),ess(SDMA).’(RF),ortoawidebandmicrowavelink,andrelayedtomobileswitchingcenters(MSC),work(PSTN).municationsfromthePSTNaresenttothebasestation,(FDMA),ess(TDMA),ess(CDMA),ess(SDMA).municationlinksexperiencehostilephysicalchannelcharacteristics,suchastime-,theperformanceofwirelesscellularsystemstendstobelimitedbyinterferencefromotherusers,andforthatreason,,,evenwhenthechannelismodeledinananalyticallyelegantmanner,inthevastmajorityofsituationsitisstilldifficultorimpossibletoconstructanalyticalsolutionsforlinkperformancewhenerrorcontrolcoding,equalization,diversity,,therefore,,thesystemperformanceofacellularradiosystemismosteffectivelymodeledusingsimulation,,suchasthelocationofusers,thenumberofsimultaneoususersinthesystem,thepropagationconditions,interferenceandpowerlevelsettingsofeachuser,ogethertoimpacttheoverallperforma
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