混合ACA和MLFMA方法计算复合目标电磁散射-豆柴文库

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混合ACA和MLFMA方法计算复合目标电磁散射
Title:HybridizationofACAandMLFMAmethodsforthecomputationofcomplextargetelectromagneticscattering
Abstract:
Withtheincreasingcomplexityofelectromagneticscatteringproblems,itbecomesnecessarytodevelopmoreefficientandaccuratecomputationalmethods.Inthispaper,weproposeahybridapproachthatcombinestheAdaptiveCrossApproximation(ACA)andMultilevelFastMultipoleAlgorithm(MLFMA)methodstocomputetheelectromagneticscatteringfromcomplextargets.TheACAmethodisutilizedtoreducethecomputationalcomplexityoftheMLFMAmethodwhilemaintainingaccuracy.Theresultinghybridapproachofferssignificantadvantagesintermsofbothcomputationalefficiencyandaccuracyforelectromagneticscatteringproblems.
1.Introduction
Electromagneticscatteringplaysacrucialroleinawiderangeofapplications,includingradarsystems,remotesensing,andwirelesscommunication.Asthecomplexityofscatterersincreases,traditionalnumericalmethodscanbecomecomputationallyprohibitive.TheACAandMLFMAmethodshavebeendevelopedasefficienttechniquesforsolvinglarge-scaleelectromagneticscatteringproblems.Inthispaper,weproposeahybridapproachthattakesadvantageofthestrengthsofbothmethodstoachieveaccurateandefficientcomputationsforcomplexscatterers.
2.AdaptiveCrossApproximation(ACA)method
TheACAmethodisaneffectivetechniqueforreducingthecomputationaleffortinsolvinglarge-scalesystemsofequations.Itusesalow-rankapproximationtoachievecompactrepresentationoftheinteractionmatrix.Thisleadstoasignificantreductioninbothmemoryrequirementsandcomputationalcomplexity.Inthissection,weprovideanoverviewoftheACAmethodanditsapplicationinelectromagneticscatteringproblems.
3.MultilevelFastMultipoleAlgorithm(MLFMA)
TheMLFMAisawell-knownmethodforsolvinglarge-scalescatteringproblems.Itexploitsthefar-fieldradiationpatternofscatterersandemploysahierarchicaltreestructuretoachievefastandaccuratecomputations.However,forhighlycomplexscatterers,theMLFMAcanstillsufferfromhighcomputationalcosts.Inthissection,wedescribetheMLFMAanditslimitationsinhandlingcomplexscatterers.
4.Hy