burst模式合成孔径雷达成像算法研究

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1、南京航空航天大学硕士学位论文Burst模式合成孔径雷达成像算法研究姓名：邹海丽申请学位级别：硕士专业：信号与信息处理指导教师：朱岱寅20081201Burst模式合成孔径雷达成像算法研究ABSTRACTSyntheticApertureRadar(SAR)isamicrowaveimagingsystemwiththecapabilityofday/nightoperationfromfarrangeinallweatherconditions,whichisofgreatimportancetothemodernizationofnationaldefenc

2、eandnationaleconomicdevelopment.BurstmodeSARisanimportantimagingmodeofSAR,whichcanobtaincontinuousmodertateresolutionimagebyprocessingtheacquireddatawithgaps.OneofitsfamousapplicationsisScanSAR,whichcangivelargerangeswathsimage.ImagingalgorithmsoftheburstmodeSARispresentedinthisdiss

3、ertation.Themaincontentsareasfollows:Chapter1introducesthedevelopmentandresearchsituationofSARandburstmodeSARbriefly.Themaincontentsofthisdissertationareoutlined.Chapter2introducesthebasicoperationprincipleoftheburstmodeSAR,andgivesabriefdescriptionofthesystemdesign.Alsothefeaturesa

4、nddifficultiesoftheimagingforaburstmodearerevealedbyanalyzingthedatacharacteristicsandtheimagegenerationofasingletarget.Thenthemainsignalprocessingstepsoftheburstmodedataarediscussed,ofwhichsearchingtheproperalgorithmisthekeyproblem.Chapter3derivestheSPECANalgorithmindetail,whichisa

5、nefficientalgorithmthatcanbeusedtoobtainSARimageatamoderateresolution.TheperformanceoftheRangeCellMigrationCorrection(RCMC)andthegeometricdistortionproblemforhighsquintmodearestudieddeeplywithemphasis.Thesimulationresultspresenteddemonstratethefeasibilityofthealgorithm.Chapter4inves

6、tigatestheECSalgorithmindetail,whichcombinestheCSAandtheSPECANalgorithm,andisanidealcandidatetogetthehighresolutionimageefficientlyinburstmode.Everytraitisdiscussedindetailinthischapter,includingtherangeandtheazimuthscalingprocessing,etc.Atlast,examplesusingpoint-targetssimulationsa

7、ndlivedataprocessingprovethevalidityoftheproposedalgorithm.InChapter5,thedissertationissummarizedandthepossiblefutureworkispointedout.Keywords:SyntheticApertureRadar(SAR),BurstMode,ScanSAR,SPECAN，ECS,geometricdistortion,imagemosaicingII南京航空航天大学硕士学位论文图表清单图2.1二个子带ScanSAR工作示意图.........

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