预览加载中，请您耐心等待几秒...

基于粒子群算法的两跳MIMO-OFDM中继通信系统功率分配.docx

预览
1/4
2/4
3/4
4/4

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于粒子群算法的两跳MIMO-OFDM中继通信系统功率分配 Abstract Multi-inputmulti-outputOrthogonalFrequencyDivisionMultiplexing(MIMO-OFDM)relaycommunicationsystemsarewidelyusedinmoderncommunicationsystems.However,powerallocationisanimportantissuethatneedstobeaddressedinsuchsystems.Inthispaper,weproposeapowerallocationschemebasedonparticleswarmoptimization(PSO)fortwo-hopMIMO-OFDMrelaycommunicationsystems.TheproposedPSO-basedpowerallocationschemeisdesignedtominimizethetotaltransmitpoweroftherelaystationwhileensuringthequalityofservice(QoS)oftheuser.Theeffectivenessoftheproposedschemeisevaluatedthroughnumericalsimulations,andtheresultsshowthattheproposedschemecanachieveasignificantreductioninthetotaltransmitpoweroftherelaystationwhilemaintainingtheQoSoftheuser. Introduction Inmoderncommunicationsystems,multi-inputmulti-outputOrthogonalFrequencyDivisionMultiplexing(MIMO-OFDM)relaycommunicationsystemsarewidelyusedtoimprovethequalityofcommunication.InatypicalMIMO-OFDMrelaycommunicationsystem,informationistransmittedfromthesourcetothedestinationthrougharelaystation.However,powerallocationisanimportantissuethatneedstobeaddressedinsuchsystems.Powerallocationreferstothedistributionofpoweramongdifferentsignalsandchannelsinthetransmissionprocess,anddeterminestheperformanceofthesystem.Theefficientuseandallocationofavailablepowerresourcescansignificantlyimprovetheoverallperformanceofthesystem,whichincludestheminimizationofthetotaltransmitpowerandthemaximizationofthethroughputofthesystem. Inthispaper,weproposeapowerallocationschemebasedonparticleswarmoptimization(PSO)fortwo-hopMIMO-OFDMrelaycommunicationsystems.Theproposedschemeisdesignedtominimizethetotaltransmitpoweroftherelaystationwhileensuringthequalityofservice(QoS)oftheuser.Theremainderofthepaperisorganizedasfollows.Section2describesthesystemmodelandtheoptimizationproblemformulation.Section3presentstheproposedPSO-basedpowerallocationscheme,followedbythenumericalsimulationsandresultsanalysisinSection4.Finally,Section5concludesthepaper. SystemModeland