信號(hào)與系統(tǒng)-期末考試試卷

《SignalsandSystems》試卷第4頁共6頁選擇題（4分/每題，共20分）1.Determinetheoutputofthesystemsdescribedbyfollowingdifferentialequation:，Determinezero-initialresponseandzero-stateresponse：（）（A）,，（B）,（C）,（D）,2.Evaluatethefollowingdiscrete-timeconvolutionsums:=()(A)(B)(C)(D)3.TheFSofis,theFSof()is.(A)(B)(C)(D)4.ThefrequencyresponseofaLTIsystemis,itisdistortionlesstransmissionornot?Determinethesystemoutputiftheinputisx(t)=sint+sin3t(-￥<t<￥).()itisdistortionlesstransmission;itisnotdistortionlesstransmission;itisdistortionlesstransmission;itisnotdistortionlesstransmission;5.TheimpulseresponseofaLTIsystemis,thestepresponseforthesystemis()(A)(B),here(C)(D),here填空題（4分/每題，共20分）1.Asystemhasinputandoutput.Ifthesystemhasproperties,thentheinputandoutputpairshastherelationship:inputis,sooutputis。2.Considersampling，determinethemaximumofsamplingintervalTsothattherewillbenoaliasing,(s).3.WriteorSketchthespectrumofRectangularpulsex[n]:Thereistheinverserelationshipbetweenthetimeandfrequencyextentofasignal,andtheTime-BandwidthProductofx[n]is4.theimpulseresponseofintegratoris，theimpulseresponseofdifferentiatoris,theimpulseresponseofdiscrete-timetime-shiftoperatoris。5.writetheadvantagesofmodulationapplicationtocommunicationsystems:(1)(2)(3)(4)followingcases:and.5.（13scores）Discrete-timeprocessingofcontinuous-timesignalsisshownbelow.Here,，thetimewaveandspectrumofaredepict