一种基于时频分布的跳频信号检测方法的研究

TheResearchofFHSignalDetectionBasedonTime-FrequencyDistributionZhaoHongweiLiYong(SchoolofElectronicInformation,NorthwesternPolytechnicalUniversity,Xi'an710072)AbstractTime-Frequencypeakfiltering(TFPF)allowsthereconstructionofsignalsfromtheFrequencyHopsignal(FH)corruptedbyadditivenoisebyencodingthenoisysignalastheinstantaneousfrequencyofafrequencymodulated(FM)analyticsignal.WhentheSNRislow,reapplicationoftheproceduretothefilteredsignalcouldgetgoodresults,thesimulationsusingMATLABshowscleanrecoveryofthesignalsinnoiseleveldowntoaSNRof-4dB.Keywordsfrequencyhop,Wigner-Viledistribution,SPWVD,time-frequencypeakfilteringPfcTcptTcfkakMakMztxtztxtjHilbertxthgntxktstxtstattattzstatejtstztNMPghffNfkfkffkfkfkfkfkfkfkfkfkf