具有移變特性的星機聯(lián)合雙基地SAR成像處理算法的研究.pdf

1、電子科技大學碩士學位論文具有移變特性的星機聯(lián)合雙基地SAR成像處理算法的研究姓名：左子瑾申請學位級別：碩士專業(yè)：信號與信息處理指導教師：張曉玲20100501ABSTRACTABSTRACTSpaceborne—AirborneBistaticSAP(SABiSAR)，whichisanewBistaticSARcomposedbythespacecraftandaircraft，notonlyinheritmanyadvantages

2、ofBiS凰butalsodemonstratesomeuniqueadvantages，such嬲expandingthescopeoftargetscene，savingthecostsofdataacquisition，andSOonAsbeingatypicaltranslationalvariantBiSA＆SABiSARhaSbecomeanewhotspotinradarimagingapplicationresearch

3、Inthisdissertation，baSingonthecharacteristicsofSABiSAR，theimagingalgorithmofthesystemhaSbeenfocusedon，andthemainresearchandcontributionsaleaSfollows：1TheSABiSARsystemisstudied：Establishthegeneralgeometryandsignalmodelsof

4、SABiSARfirstlyandbaSeonthesetherangehistoryandtherangecellmigration(RCM)aledisgussedThenbaSedonthecharacteristicsoftheSystemmodel，therangehistoryhaSbeenapproximatedsensiblyAtlaSt，thespatialresolutionsofbistatiCSARhavebee

5、nderivedfromtheambigui夠function2AnimagingalgorithmforSABiSARwi也anyflightmodeisproposedFirst，usetherangehistoryapproximatedofSABiSARtodedvatetheDopplerparametersuitablyforSA—BiSARsystem，whichisthekeypointtothefocusoftheim

6、agingalgorithmbaSingontheDimensionreductionFocusThenusetheInverse—ProjectionmethodtocorrectdistortionbaSingontheformulaoffinalfocusexpression3Analysisthecausesofthedistortion，whichappearsaftertheDimension—reductionFocusT

7、husageometriccorrectionmethodforcorrectiondistortionisproposedThismethodcanquicklycompletethedistortioncorrectionandcompensatefortheslowerprocessingspeedweaknessesoftheInverseProjectionmethod4TheLBFmodelandELBFmodelhaveb

8、eendetailedlystudiedBeingthemostrepresentativemethodsofsolvingtwodimensionalspectrumfortranslationalvariantBiSARcurrentlytheyarecombinedwith2DISFFTimagingalgorithminthisdissertation，andhavebeencomparedtheimagingresultsby