各种信号处理方法总结（summary of various signal processing methods）

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1、各种信号处理方法总结（Summaryofvarioussignalprocessingmethods）SignalprocessingmethodsShengYuanyuanFFT?1,FFTistheprincipleinexergyfastalgorithmofdiscreteFuLiyetransformAsignalcanbetransformedintothefrequencydomain.SomeofthesignalsareinthetimedomainItishardtoseewhatthech

2、aracteristicsofexergyistransformedintofrequencydomain,butifitiseasytoseeaftertheexergycharacteristics.?2,applicableintheanalysisoflinearandstationarysignalinthesignal,FuLiyeThetransformhasexcellentperformance.?3,advantagesofusingFuLiyetransformofthesignalinf

3、requencydomaincanbemappedtothefrequencydomainoftheexergyexergyextractionfrequencyandphaseinformationofsignalfrequencySpectrumofexergyanalysisinthetimedomainisdifficulttoseethequestionswiththesignalfrequencycharacteristicQuestions.FFT?4,thosedisadvantagesTheF

4、ouriertransformis?1inthewholetimedomainintegralisnotincludedReflectalocaltimesignalspectrumcharacteristicsincludedintimeThereisnoresolutiononthedomain.TheglobaltransformationThe2?FouriertransformmayhavemissedashorttimesignalEspeciallyafewprominentpointchange

5、sofexergyexergycausedbytheso-called"spreadspectrum"Phenomenon.Thespectralcharacteristicsof3?Thismethodforwhentheoriginalsignalintostableandhasobviousdifferenceisquiteeffective.STFT?1,theprinciplesignalisdividedintomanysmallerintervalsandtheputativesignalinsh

6、orttimeintervalisstableinthepseudosteadywiththeexergyanalysisofFouriertransformineachtimeintervaltodeterminetheThefrequencyoftheintervalofexistenceinordertoachievethepurposeoftime-frequencylocalization.2signalstationarysignalfor?3,theadvantagesof?(1)alettert

7、hatobservestheinstantaneousfrequencyofasignalmoreeffectivelythanaFouriertransformInterest.?(2)toacertainextent,theFouriertransformtoovercometheshortcomingsoftheglobaltransformation.STFT?4,1indisadvantages?Exergyshort-timeFouriertransformtoanalyzepiecewisesta

8、tionarysignalsorapproximatestationarysignalbutthebutfornon-stationarysignalwhentheletterNodramaticchangestherequirementsoftimeresolutionandhighexergywindowfunctionwaveformchangesgentlywhenexergy