review of Signals and systems.doc
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review of Signals and systems.doc

reviewofSignalsandsystems.doc

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SignalsandsystemsChapter1:Transformationsoftheindependentvariable:,,,,,Periodicsignalsandperiodic:,Fundamentalperiod:;Fundamentalfrequency:;Harmonicfrequency:,,Fundamentalperiod:,Fundamentalfrequency:Harmonicfrequency:,EvensignalsandOddsignals:Unitimpulse::;Unitstepsequence::;Unitimpulsefunction::,Unitstepsequence::,Pulse:Propertiesofthesystem:LinearityTime-invarianceCausalityStabilityChapter2LinearTime-InvariantsystemsUnitimpulseresponseofdiscrete-timeLTIsystem:Convolutionsum:ComputationofConvolutionsum:reverse,shift,multiply,sum;InterconncetionofLTIdiscrete-timesystems:Cascade(serial)connection:;Parallelconnection:PropertiesofLTIsystem:Causality:Stability:Unitstepresponse:;Linearconstantcoefficientdifferenceequation:Orderofthedifferenceequation:max(N,M)Solutionofthedifferenceequation:naturalresponse,FordedresponseZeroinputresponseZerostateresponseInitial/originalstatestartstate:unitimpulseresponseanddifferenceequationUnitimpulseresponseofcontinuous-timeLTIsystem:Convolutionintegral:ComputationofConvolutionintegral:reverse,shift,multiply,integral;InterconncetionofLTIcontinuous-timesystems:Cascade(serial)connection:;Parallelconnection:PropertiesofLTIsystem:Causality:Stability:Unitstepresponse:;Linearconstantcoefficientdifferenalequation:Orderofthedifferenceequation:max(N,M)Solutionofthedifferenceequation:naturalresponse,FordedresponseZeroinputresponseZerostateresponseInitial/originalstatestartstate:unitimpulseresponseanddifferenalequationChapter3FourierseriesResponseofLTIsystemstocomplexexponentials:Fourierseriesofcontinuous-timesignals(CTFS):,Fundamentalfrequency,harmonicallyfrequencyFundamentalperiodMagnitudespectrum|ak|:discrete,attenuatd,Phasespectrum:≮akRelationofWaveformpropertyandspectrum:evensignal:≮ak=0or.Oddsignal:≮ak=±/2Oddharmonicalsignal:.evenharmonicalsignal:.Fourierseriesofdiscrete-timesignals(DTFS):,Fundamentalfrequency,harmonicallyfrequencyFundamentalperiodMagni