一種針對(duì)分布式MIMO雷達(dá)的高效干擾功率分配方法

一種針對(duì)分布式MIMO雷達(dá)的高效干擾功率分配方法Title:EfficientInterferencePowerAllocationMethodforDistributedMIMORadarAbstract:Withtheincreasingdemandforhigh-resolutionimagingandtargetdetection,distributedMultiple-InputMultiple-Output(MIMO)radarhasemergedasapromisingsolution.However,interferencemanagementisasignificantchallengeinsuchsystemsduetothemutualinterferencebetweenmultipleradarnodes.Inthispaper,weproposeanefficientinterferencepowerallocationmethodfordistributedMIMOradar.Theproposedmethodaimstooptimizethepowerallocationschemetomitigateinterferencewhilemaintainingthedesiredperformanceintermsoftargetdetectionandestimation.Simulationresultsdemonstratetheeffectivenessoftheproposedmethodinimprovingradarsystemperformanceandreducinginterference.1.Introduction:Inrecentyears,thedistributedMIMOradarsystemhasgainedsignificantattentioninthefieldofradarsignalprocessing.DistributedMIMOradardeploysmultipletransmitandreceiveelementsoveralargegeographicalarea,enablingenhancedsensingcapabilitiescomparedtotraditionalradarsystems.However,thespatialoverlapofthetransmittedsignalsfromdifferentnodesinthedistributedMIMOradarsystemleadstointerference,whichaffectstheoverallsystemperformance.Thus,efficientinterferencepowerallocationmethodsarerequiredtoreducetheimpactofinterferenceandenhancetargetdetectionandestimationcapabilities.2.RelatedWork:SeveralresearchworkshavefocusedoninterferencemitigationindistributedMIMOradarsystems.Traditionalapproachesincludespatialfiltering,adaptivebeamforming,andnullsteering.Thesemethodsareeffectiveinreducinginterference,buttheyrequireprecisechannelstateinformationandsufferfromperformancedegradationinmultipathenvironments.Recentstudieshaveexploredpowerallocationtechniquestomitigateinterferencebyadjustingthetransmitpowersofdifferentradarnodes.However,thesemethodsoftenrelyonheuristicsorsuboptimalpowerallocationschemes,limitingtheirefficiency.3.SystemModel:WeconsideradistributedMIMOradarsystemwithNttransmittersandNrreceivers.Thetransmittedsignalspropagatethroughacommonmediumandundergomutualinterferenceatthereceivers.Thereceivedsignalattheithreceivercanbewrittenasalinearcombinationofthetransmittedsignalsfromalltransmitters,corruptedbyadditivenoise.4.InterferencePowerAllocationMethod:TheproposedinterferencepowerallocationmethodaimstooptimizethetransmitpowerallocationschemeforthedistributedMIMOradarsystem.Theobjectiveistominimizetheinterferencepowerateachreceiverwhilemaintainingthedesiredradarsystemperformanceintermsoftargetdetectionandestimation.4.1ProblemFormulation:Weformulatetheinterferencepowerallocationproblemasanoptimizationproblem.Theobjectivefunctionistominimizetheinterferencepowerateachreceiver,subjecttoconstraintsontransmitpower,signal-to-interference-plus-noiseratio(SINR),andtargetdetectionperformance.Theoptimizationproblemissolvedusingconvexoptimizationtechniques,consideringthetransmitpowerateachradarnodeasthedecisionvariable.4.2AlgorithmDesign:Weproposeaniterativepowerallocationalgorithmtosolvetheoptimizationproblem.Thealgorithmiterativelyadjuststhetransmitpowerateachradarnodebasedontheinterferencemeasurementandtheoptimalpowerallocationobtainedfromthepreviousiteration.Thealgorithmconvergeswhentheinterferencepowerisminimizedwhilemeetingtheperformancerequirements.5.PerformanceEvaluation:Weconductextensivesimulationstoevaluatetheperformanceoftheproposedinterferencepowerallocationmethod.Wecomparetheproposedmethodwithexistinginterferencemitigationtechniquesintermsofinterferencepowerreduction,targetdetectionperformance,andestimationaccuracy.Thesimulationresultsdemonstratethesuperiorityoftheproposedmethodinreducinginterferenceandenhancingradarsystemperformance.6.Conclusion:Inthispaper,wehaveproposedanefficientinterferencepowerallocationmethodfordistributedMIMOradar.Themethodoptimizesthepowerallocationschemetominimizeinterferencewhilemaintainingthedesiredradarsystemperformance.Simulationresultshighlighttheeffectivenessoftheproposedmethodinreducinginterferenceandimprovingtargetdetectionandestimationcapabilities.Theproposedmethodcan