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毫米波主被动复合成像信号处理.docx

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毫米波主被动复合成像信号处理 Title:SignalProcessingforMillimeter-WaveActive-PassiveSyntheticImaging Abstract: Millimeter-wave(mmWave)technologyhasgainedsignificantattentioninrecentyearsduetoitspotentialforhigh-resolutionimagingandsensing.OneofthepromisingapplicationsinmmWavetechnologyisactive-passivecompositeimaging,whichcombinestheadvantagesofbothactiveandpassiveimagingsystemstoenableenhancedimagingcapabilities.ThispaperexploresthesignalprocessingtechniquesusedinmmWaveactive-passivesyntheticimagingandhighlightsthechallengesandadvancementsinthisfield. Introduction: Millimeter-waveimagingoperatinginthefrequencyrangeof30-300GHzhasuniquecharacteristicssuitableforvariousapplications,includingsecurityscreening,autonomousvehicles,andmedicalimaging.Inparticular,active-passivecompositeimaginghasemergedasavaluabletechniquethatintegratesbothactiveandpassiveimagingsystemstoachieveimprovedspatialresolution,detectionsensitivity,andimagingrange.ThispaperfocusesonthesignalprocessingaspectsofmmWaveactive-passiveimaging,highlightingthemajorcomponentsinvolvedandtherecentresearchadvancements. I.OverviewofmmWaveActive-PassiveCompositeImaging A.ActiveandPassiveImagingSystems 1.Activeimaging-principlesandbenefits 2.Passiveimaging-principlesandbenefits B.AdvantagesofActive-PassiveCompositeImaging C.SystemArchitectureofmmWaveActive-PassiveImagingSystems II.SystemCalibrationandSynchronization A.Calibrationtechniquesforactiveandpassivesensors B.Alignmentandsynchronizationofactiveandpassiveimagingsystems C.Compensationforaberrationsanddistortions III.SignalProcessingMethods A.Datapre-processingtechniques 1.Filteringandnoisereduction 2.Signalnormalizationandcalibration B.Imageformationalgorithms 1.Non-imagingalgorithms(e.g.,inversesyntheticapertureradiometry) 2.Imagingalgorithms(e.g.,backprojection,delay-and-sum) C.Imageenhancementandreconstructiontechniques 1.Super-resolutionimaging 2.Compressedsensingandreconstruction IV.ChallengesandAdvancesinmmWaveActive-PassiveImaging A.Mitigationofmultipatheffectsandi