基于已知信號波形的DOA估計研究.pdf

1、電子科技大學碩士學位論文基于已知信號波形的DOA估計研究姓名：余嘉申請學位級別：碩士專業(yè)：信號與信息處理指導教師：何子述20100501ABSTRACTDirection。ofarrival(DOA)estimationarethepivotaltechniquesofthearraysi盟alprocesslngInconventionalDOAestimationmethods，becauseofsolutionofsubspaCe

2、eigendecompositionthecapacityofDOAestimationmethodsCallnotexceednlenumberofthearrayandhinderthedevelopmentofDOAestinlationtechniquesinimplementUsingthetimeinformationofreferencesignaltoestimatethetargetDOAtomakesubspacee

3、igendecompositionunnecessaryandthecapacitybelargemanⅡlenumberofarrayofsignalinactiveradarsonarandcommunicationThisdissertationmakethemainlyresearchfocusontheDOAestimationme也odbasedonthereferencesignal，especiallyinsubarra

4、ybeamformingDOAestimationm劬od，whichisanovelandadvancealgorithmThistechniquecallestimatethetar剛：DOAinthepresenceofinterference，andmakecapacityofthismethodcanbefarlargerthanthenumberofantennaelementBasedonthis，severalmodif

5、iedmemodareproposed111thisdissertation，andnumericalsimulationresultsCanverifytheeffectivenessofalgorithmsForfastDOAestimation，thisdissertationusetheMultistageNestedWienerFilterwhichCanbewidelyusedinengineeringreplacetheb

6、eamformerbasedonWienerFilterstructureinSBDOAmethod，andproposeanovelDOAestimationmethodMSNWFDOAThismethodrealizescomputationofinversionofcov撕aIlcemamxbecomesunnecessaryandthusreducesthecomplexityofcomputationSimulationres

7、ultsdemonstratetheadvantageofthismethodForDOAestimationmethodbasedonuniformcirculararraythisdissa慨ionusesthemodetransformationalgorithm，andcombinesthestructureofcirculara】叮avandSBDOAandproposestheUCA—SBDOAThismethodCanpr

8、ovide360。ofcoverageinazimuthplaneForLshapeDOAestimationmethod，thisdissertationstudythe2Dimensionmethod，includingcrosscorrelationESPRITautopairmatchingmethod，andproposeanewmethodbasedonL。shapeSimulationresultsdemonstratet