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基于梳状谱调制的LFM雷达噪声卷积干扰技术.docx

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基于梳状谱调制的LFM雷达噪声卷积干扰技术 基于梳状谱调制的LFM雷达噪声卷积干扰技术 Abstract: Inthefieldofradarsignalprocessing,theaccuratedetectionandtrackingoftargetsareofgreatimportance.However,theperformanceofradarsystemscanbesignificantlyaffectedbyvarioustypesofinterference,includingnoiseandconvolutedinterference.ThispaperintroducesthedevelopmentofanoveltechniquebasedonthechirpspectrummodulationforLFM(LinearFrequencyModulation)radarsignalstoeffectivelysuppressnoiseandconvolutedinterference.TheproposedtechniquecanimprovethedetectionandtrackingperformanceofLFMradarsystemsinchallengingenvironments. Keywords:LFMradar,noisesuppression,convolutedinterference,chirpspectrummodulation 1.Introduction Radarsystemsplayavitalroleinvariousapplicationssuchasmilitarysurveillance,weathermonitoring,andautonomousdriving.Theaccuratedetectionandtrackingoftargetsarecrucialfortheperformanceofradarsystems.However,thepresenceofnoiseandinterferencecansignificantlydegradetheperformanceofradarsystems,affectingtheirabilitytodetectandtracktargetsaccurately. LFMradar,usingLinearFrequencyModulationsignals,hasbeenwidelyusedinradarsystemsduetoitsadvantagesoflargebandwidth,highresolution,andrelativelysimpleimplementation.However,LFMradarsignalsaresusceptibletovarioustypesofinterference,includingnoiseandconvolutedinterference.Convolutedinterferencereferstotheinterferencecausedbymultiplereceivedsignalsoverlappingintheradarsystem,whichoftenleadstointerferencepeaksintherange-Dopplermapandaffectstheaccuracyoftargetdetectionandtracking. InordertosuppressnoiseandconvolutedinterferenceinLFMradarsignals,anoveltechniquebasedonchirpspectrummodulationisproposedinthispaper.ThechirpspectrummodulationtechniquemodulatestheLFMradarsignalwithacomb-likespectrum,whichspreadsthepowerofthesignalinthefrequencydomain,effectivelysuppressingnoiseandinterference. 2.ChirpSpectrumModulationTechnique Thechirpspectrummodulationtechniqueisbasedontheprincipleofsignalprocessinginthefrequencydomain.BymodulatingtheLFMradarsignalwithacomb-likespectrum,thepowerofthesignal