機載SAR實時成像處理算法的研究.pdf

1、分類號UDCY987868編號中國科學院研究生院博士學位論文扭夔墨△B塞吐盛堡處理簋選趁班究指導教師昱=疽班究雖工麥塍班究雖蟲國型堂院電王堂班究壓申請學位級別簋學科專業(yè)名稱值曼皇信息矬壟論文提交日期圣QQ魚生!旦論文答辯日期培養(yǎng)單位一生國型堂院電王堂班究匱學位授予單位蟲國型堂院硒究生院答辯委員會主席周菌渲ResearchofIlealTimelmageProcessingAlgorithnlFol’Air‘botlIICSyntheti

2、cApertureRadar^I)sIIHcIZhangXin(SigrtalandMbrmationprocessing)DilectedbyWuYi—i‘ongI)ingChibiaoThemostadvantageofthesyntheticapertm‘eradar(SAR)istheabilityofobservingthetargetilrallweatherandtimeTbet’earealotofapplication

3、sofSAltinmilitaryandcivilaspectAtthesametime，theapplicationofhighresolutionrealtimeSARisveryimpol‘lanlTheeffectofrangecellmigrationtoautofocusisanalyzedinthedissertationAnewShift—And—Co’rclatcautofocusalgorithmbased01)th

4、elimitsofrangebinispresented，whichcalledShift—And—ColidatewithinGateStllategyfSACGS)Theeffectofrangecellmigllationtoautofocusisdil33inishedAndthecomputationisVeI’Ysimple，whichmakeitverysuitableforreal—timein3ageprocessin

5、gTheefficiencyofSACGSisI)IovedbythesiinulationalldactualSARdataAfterdealtwithalotofactualstripmapSARdata，lhefactol‘whicheffectstheprecis／onariditetativctJnicsofPGA“vvasfotmdhiordertonleetthef_eqtlestofiealtimeimagingofhi

6、ghresolutionSAlt，theshiftandcorl‘elate(SAC)algol。ithm，SACGSalgoi’ithm，PGAalgorithmandRangcDopplel。(I≈I))algorithmaleintegt。atedWiththeintegi‘a(chǎn)tcdalgol。ithni，theiteialtondoesnotneedany11101cAndthecompuialionisdecieased’Jl

7、ierealtimeimagingsystemCallbctlji’110IinlorealityeasierTheintegl‘a(chǎn)tedalgorithmischeckedoutwithrealhighresoltltionSARdataAndthe1esultisgoodSeveralclassicalgol。ithmsareintroducedAftei’analyzedthel。elationshipofthetwo—dimen

8、sionalspect。[1131，alleasyimplenaentedsquintrealtimeimagingmethodispresentedWiththemethod，theproblemsofimagejointandazimutbfocusdepthalesolvedTheproblemofazimuthspectrtanoverlapisalsosolvedinlhepaperKeywords：syntheticapei