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MIMO雷达波形设计.docx

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MIMO雷达波形设计 Abstract MIMO(Multiple-InputMultiple-Output)radarhasbeenwidelyusedinmodernradarsystemsforitscapabilityofprovidinghigherresolution,improvingtargetdetectionandrangeestimation.TheperformanceofMIMOradarisheavilydependentonwaveformdesign,whichdeterminestheperformanceofthesystemintermsoftargetdetection,rangeestimation,andoverallsystemcomplexity.ThispaperdiscussestheimportanceofMIMOradarwaveformdesign,andpresentsdifferentapproachesforwaveformdesign.ItalsoanalyzessomeofthechallengesassociatedwithMIMOradarwaveformdesign,particularlywithrespecttothetransmitpowerconstraint,theDopplerambiguityproblem,andtheinterferencebetweenmultipletargets. Introduction Radar,anacronymfor`RadioDetectionandRanging',isanimportanttoolusedfordetectingandlocatingtargetsusingradiowaves.Radarworksbyemittingabeamofradiowavesandanalyzingthereflectedsignalreceivedbackfromthetarget.Theradarperformanceisheavilydependentonthetransmittedwaveform,andthequalityofthewaveformdirectlyaffectsthesystem'sabilitytodetect,locate,andtracktargets. MIMOradarisatypeofradarsystemthatutilizesmultipleantennasforbothtransmittingandreceivingsignalssimultaneously.Unliketraditionalradarsystems,MIMOradartransmitssignalswithdifferentwaveformsfromeachantenna,andthesignalsreceivedareprocessedtoestimatetherange,velocity,andangularpositionofthetarget.MIMOradarhasbeenwidelyusedinmilitaryandcivilianapplicationsbecauseofitshighresolution,improvedtargetdetection,androbustnessagainstjamming. MIMORadarWaveformDesign Thetransmitwaveformiscrucialforanyradarsystemsinceitdeterminesthecapabilityoftheradartodetectandidentifytargets.ThewaveformdesignforMIMOradarposesadditionalchallengescomparedtotraditionalradar,suchasthetransmitpowerconstraint,theDopplerambiguityproblem,andtheinterferencebetweenmultipletargets. Tomitigatethesechallenges,variousapproacheshavebeenproposedforMIMOradarwaveformdesign,suchasProlatespheroidalwavefunctions(PSWF),theFrankcodes,BinaryPhaseShiftKeying(BPSK),andOrthogonalFrequencyDivisionMultiplexing(OFDM)wavefor