通信工程畢業(yè)論文-cdma通信系統(tǒng)多用戶檢測(cè)研究

1、本科畢業(yè)論文本科畢業(yè)論文（2020屆）屆）CDMA通信系統(tǒng)多用戶檢測(cè)研究所在學(xué)院專業(yè)班級(jí)通信工程學(xué)生姓名學(xué)號(hào)指導(dǎo)教師職稱完成日期年月AbstractWiththerapiddevelopmentofthemobiletelecommunicationCodeDivisionMultipleAccess(CDMA)technologyisidentifiedasmainaccessmethodofthethirdgenerationmob

2、iletelecommunicationsystem(3G)becauseofitsoutstingadvantages.CDMAbasedonthespreadspectrumsignalusesdifferentpatternstorealizemultiuserinfmationtransmissionthesignalstransmittedofwhichareoverlaidinthetimedomaintheairspace

3、domainsoitcansuppthighcapacityhighspeeddataservices.Thethirdgenerationmobiletelecommunicationsystemcanovercomeimprovetheshtageofthesecondgenerationtelecommunicationsystem(GSM)suchaslowcapacitylowspeedwhichisfarawayfromth

4、erequireddemofmultimediaservicesoftherecentIPtechnologiescan’trealizeglobalseamlessconnectionMultiuserdetectioninconsiderationofotherusers’infmationfullyusestheinnerstructuralinfmationoffeaturecodesofCDMAuserstoimproveth

5、eperfmanceofreceptionsystem.Multiuserdetectioncanimprovesystemcapacityovercometheeffectsofnearfarproblem.Atpresentithasbeenalreadymaturetheeticallybutduetothecomplexityofrealizingititisstillneededtobeputintoengineeringus

6、e.Butithasbecomeoneofthekeytechnologiesofthethirdgenerationmobiletelecommunication.FirstthispaperintroducesthebasicprinciplesadvantagesdisadvantagesofCDMA(CodeDivisionMultipleAccess)communicationsystemwherebytheproposedb

7、asicprinciplessystemmodelofmultiuserdetectionamongwhichitputsemphasisontheresearchofalinearmultiuserdetectionalgithmMinimumMeanSquaredErr(MMSE)Decrelationlinear(DEC)multiuserdetectionmethod.Thedesignintentofmultiuserdete

8、ctionistomakethemeansquareerrbetweenthetransmissionsignalofthe.Kusersitsestimatevaluesmallest.Bothalgithmshavetheirownadvantagesitisamultiuserdetectionalgithmrepresentative.Finallymatlabsimulationenvironmentsimulationdra