信号与系统：复习new

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1、ReviewChapter1SignalsandSystems:BasicConcept1.SignalsContinuous-time/Discrete-time特点/差别/表示方法2.EnergyandPowerDefinitionandComputation,Classification定义，计算，分类3.TransformationofthevariableDefinition,howtotransform定义，计算，图形4.SignalsofdifferentkindPeriodicsignalEvenandoddsignalEvenandoddpartofsign

2、alExponentialsignalSinusoidalsignalPeriodicdiscretesignal定义，条件，特点，表达式，图形；相互关系；尤拉公式；5.UnitStepandUnitImpulseSignals定义，特点；表达式，图形；相互关系(公式、图形）6.Systems定义；微分方程及差分方程的概念7.InterconnectionofSystems框图/串/并/反馈LTI，L，Z8.PropertiesandSystemsMemoryInevitabilityCasualty*定义、特点（公式、图形）、性质Stability**Time-Invari

3、ance**Linearity**Chapter2AnalysisofLTIsystemsinTime-domain//ConvolutionMethod1.TheMethodht()hn[]xt()Lyt()xn[]Lyn[]key:①ht()?②?③Howtocompute2.ht()Equyt.()~()xtyn[]~[]xnHs()ht()definitonHowtoget,DifferentialDifferenceEqu/Hz()hn[]st()单位阶跃响应relationsht()单位冲激ht()~systemproperties3.about

4、fromDefinitionDefinition//Properties//ComputationMethodbypropertiesandknownresult4.BasicIdeaoftheMethod()tLTIht()KnowbasicsignalanditsresponseLinearityofsystemxt()LTIyt()Unknownsignalanditsresponsex()(t)dx()(ht)dLTIChapter3/4/5AnalysisofLTIsystemsinFrequencyDomain3~Fo

5、urierSeries,4/5~FourierTransform1.TheMethod①→②→③PeriodsignalTN/ht()hn[]xt()LTIyt()xn[]LTIyn[]Hj()compareHe()jFF11①ss③①FsFs③22jkxkHjk()ykxkHe()NykT②②Aperiodsignalht()hn[]xt()LTIyt()xn[]LTIyn[]Hj()compareHe()j①F1③①F1FF③Xj()Hj()Yj()jjjXe()He()Ye()②②11jKey:FF/;FF/;h

6、t()~Hj()orhn[]~He()ss2.FF//:DefinitionsPeriodsignalTN/2jktxt()xeT1k()Fsk1FsFs21jktxxte()Tdt()FskTT2jknN()F1xn[]xekskNFF1ss21jknxxne[]N()FksNnNAperiodsignal1jt1xt()Xj()ed()F21FFXj()xte()jtdt()F1jjn1xn[]Xe()ed()F221FFjjn()

7、FXe()xne[]n3.xforperiodicsignalHowtogetorcomputek①Definition//Euler'srelationFs②Byknown??andpropertiesofFs1221jk③xXjk()xXe()NkTTkNjXj()

8、Xe()

9、2k2kTNFofcorrespondingaperiodicsignal:thefirstperiodj4.Xj()//Xe()foraperiodsignal:Howtoget?①by