陣列誤差條件下的波達方向估計.pdf

1、西南交通大學碩士學位論文陣列誤差條件下的波達方向估計姓名：趙亮申請學位級別：碩士專業(yè)：信號與信息處理指導教師：王建英20090501一西南交通大學碩士研究生學位論文第1I頁AbstractArrayerrorisalmostunavoidableinthedirectionfindingbasedonsensorarrayinpracticeTheperformanceoftheDOA(DirectionofArrival)algori

2、thmsdecreasesbadlyinarrayerrorconditionforthearraymanifoldisdifferentfromtheidealmodelIt’SoneofthemainreasonsformanyDOAmethods’applicationstealsystemshavebeenverylimitedThereforeitbeofcurrentsignificancetesearchrobustDOA

3、algorithmsInthisdissertation，theselfcalibrationbasedonsparsedecompositionandeigenstructurearestudiedtocalibratethechannelgainandphaseerrorandarrayelementlocationerrorandmutualcouplinginarrayaswellasestimatetheDOAThemainw

4、orkofthethesisarelistedasfollows：1Ananalysisofe位ctofsensorgainandphaseuncertaintyonMUSICalgorithmispresentedTheperformanceoftheselfcalibrationbasedonsubspacemethodandthecalibrationbasedonsingleauxiliarysourceistestedbyco

5、mputersimulationsThenwediscussthefeasibilityoftheselfcalibrationbasedonMUSICapplytoestimationofthe2dimensional(2一D)DOAandsensorgainandphaseerrorwithuniformcirclearray2Selfcalibratingmethodsfordirectionfmdingwithsensorgai

6、nandphaseuncertaintiesandsensorlocationerrorsaredesignedThemethodswhichcombinedsignalsparselydecompositionandgeneticalgorithmprovidehighaccuracyofDOAestimationintheprensenceofarrayerrorconditionaswellascalibrationofeachs

7、ensorInadditiontheapproachshavegoodperformanceinthecaseofseriousarrayerror3SincethemutualcouplingmodelofuniformlineararrayⅣLA)anduniformcirclearray(UCA)arespecial，selfcalibratingapproachsbasedontransformationofmatrixwith

8、sensormutualcouplinguncertaintyofUCAandwithsensormutualcouplingandgainandphaseuncertaintyofULAarepresentedThenewapproachsprovidehigheraccuracyofinitialDOAestimationwithouttheimformationofmutualcouplingTheiteratingprocess