寬帶數(shù)字信道化偵察接收機的高效FPGA實現(xiàn)研究.pdf

1、電子科技大學(xué)碩士學(xué)位論文寬帶數(shù)字信道化偵察接收機的高效FPGA實現(xiàn)研究姓名：鄒斯旻申請學(xué)位級別：碩士專業(yè)：信號與信息處理指導(dǎo)教師：唐斌20100501ABSTRACTABSTRACTDi百talchannelizedreceiverwhichhastheadvantagesofbroadbandinstantaneousfrequencycoverage，highsensitivitylargedynamicrangeandsimult

2、aneoussignaldetectionabilityisthemainresearchsubjectsoftheradarinterceptreceiverIndi百talchannelizedreconnaissancereceiversystem，signaldetectionanddi【百talchannelizedarethetwokeytechnologiesinsignalpre—processingwhichspans

3、fromintermediatefrequencysignaloutputtobasebandTheformeraffectsthequalityofsystem—widesurveillancetoagreatextentTheresultsofparameterestimationandsignalsortingaredirectlyaffectedbythemeasuringprecisionofthetimeofarrival(

4、TOA)andpulsewidth(PW)Thelatterwhichisthecorepartofthewidebanddigitalchannelizedreceiverseparatestheinterceptedsignalsbyfrequencydomainandshiftsthemtobasebandafternonaliasingdecimationinorderteducethechip’Sspeedrequiremen

5、tsinthesubsequentsignalprocessingItisthestartingpointofthisdissertationSupportedbytwocorrespondingprograms，twokeytechnologies，signaldetectionandchannelizedindigitalchannelizedreconnaissancereceiverarestudiedTheimplementa

6、tiononfieldprogrammablegatearray(FPGA)ofthewholesystemisalsostudiedThemaincontributionsofthedissertationaresummarizedasfollows：1Thenon—cooperationsignaldetectiontheoryisdiscussedfirstlyThensomepulsesignaldetectionmethods

7、whichCanbeimplementedinhardwareareanalysedAnautocorrelationalgorithmforreal—timedetectionofradarpulsesisproposedinthisdissertationComparedwiththeoriginalalgorithm，theproposedoneimprovestheaccuracyofTOAandPWfornarrowbandp

8、ulseestimation，possessestheabilityofdetectionandestimationforwidebandpulseAlso，itCanbeeasilyimplementedinhardwareThesimulationsshowithasgooddetectionperformanceinreal—timeprocessingenvironment2Thetheoreticalfoundationoft

9、hedilgitalchannelized，themulti—ratesignalprocessingtechnologyisdiscussedBasedonthistheorythedigitalchannelizedarchitectures訊thpolyphasefilterbanksarededuced，designedandsimulatedinaccordancewiththetargetrequirementsThenth