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1、实用标准WirelessNetworkExperimentFour:Co-channelInterference文案大全实用标准ABSTRACTThisexperimentisdesignedtolearnthefundamentalsofthecellularwirelesscomunication.Mainlyabouttheco-interferenceandSIR.KEYWORDS:wirelesscommunication,cluster,pathloseexponent,SIR.INSTRUCTIONInthisexperiment,wearegoingtoinvestigat
2、etheco-channelinterferenceinacellularmobilecommunicationsystem.Assumethatallcellshaveequalradii,andthatbasestationshaveequalpowerandarelocatedinthecentersofeachcell.Eachbasestationtransmitsanindependentsignalsothattheco-channelsignals'powerscanbeaddeddirectly.Inourtextbook,thesystemco-channelinter
3、ferenceischaracterizedbytheinterferenceataspecificposition,e.g.atthefringeofacelloratthecenterofacell.Becauseoftherandompositionofamobilesubscriber(MS)andotherrandomfactors,theco-channelinterferenceisalsoarandomvariable.Asknown,interferencecancelationtechniquecangreatlyimprovethesystemcapacityinth
4、ecellularmobilesystem,especiallyintheCDMAsystems.Itishelpfultoknowthedistributionoftheinterferencewhenadoptinginterferencecancelationtechniques.Therefore,ourexperimentdevotestofindthedistributionoftheco-channelinterferenceinthecellularmobilesystemwithclustersizeN.LetusassumethecellradiusR,eachMSco
5、uldappearatanypositioninthecellwithequalprobability.TheaveragereceivedpowerPrata文案大全实用标准distancedfromtransmitterisapproximatedaspr=p0(dd0)-n,whereP0isthepowerreceivedatasmalldistanced0fromthetransmitterandnisthepathlossexponent.Theexperimentrequirementsarethefollows.DESCRIPTIONOFTHEEXPERIMENTS1.Wr
6、iteaprogramtocalculatethesignalinterferenceratio(SIR)intheforwardlink,andrepeatsitbyrandomlychangingthepositionoftheMS.Afteranumberofsimulations,usethesimulatedresultstodrawthehistogramoftheSIR(S=I).TrytoobtainhistogramswithdifferentpathlossexponentnandclustersizeN.Concludeyourresults.Theco-channe
7、linterferenceintheforwardlinkcanbecharacterizedinfigure1.AMSwillbeinterferedbytheco-channelbasestation.Inoursimulation,weconsiderthe18co-channelcell,including6cellsinthefirstloopand12cellsinthesecond,nomatterwhat
