数字信号处理实验指导书_学生

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1、TheexperimentinstructionDigitalSignalProcessingSchoolofAutomationContents1.1Discrete-timeSignalAnalysis1.2DiscreteTimeDomainSystemAnalysis1.3Frequencydomainsystemanalysis2.1FFT2.2Digitalfilterdesign2.3TEXTBOOK3.1Signalanalysisandprocessing(Gas-solidflowsign

2、al)3.2Signalanalysisandprocessing(Magneticresonancesignal)4AdditionalexperimentsExperiment1.1Discrete-timeSignalAnalysis1・PurposeBefamiliarwiththecharacteristicsofdiscrctc-timcsinusoidalsignal.2.Contents(1)ConsiderXM(n)=sin(2nMn/N),assumeN=12,whenM=4,5,7and

3、10,drawxM(n)respectivelywithstemintherange0^nW2N-l・Whataretheminimumperiodsofabovesignals?HowtodeterminetheminimumperiodofsignalwitharbitrarypositiveintegersMandN?ThecaseofM>Nmustbeconsidered・(2)Considerxk(n)=sin(cokn),wherewk=2k/5-Letk=l,2,4and6,drawthecur

4、vesofXk(n)withstemintherange0^n^9・Andallthecurvesshouldbeputinonegraphwithsubplot.Howmanydifferentsignalsinthegraph?Pleasegivethereasonwhythesignalsaresamewithdifferentk?3.Experimentreportrequirements(1)GivetheMfilesandthefigures.(2)Answerthequestions.Exper

5、iment1.2DiscreteTimeDomainSystemAnalysis1.Purpose(1)Calculationofdiscrete-timeconvolution(2)Determinethelinearityandshift-invarianceofthesystems.2.Content2.1Calculationofdiscrctc-timcconvolution(1)Calculatetheconvolutionsofthefollowingsignalswithconv.Drawth

6、ecurvesofx(n),h(n)andy(n)(x(n)*h(n))respectively.h(n)=(4/5)nOK14h(n)=0.5sin(0.5n)0

7、・Savethex(n)intherangeof0WnW24invectorx,theh(n)intherangeofOWnW14invectorh,theresultconv(h9x)invectory.Drawthey(n)withstem,comparingwith0.5nu(n)*u(n),pleasepointoutwhichvaluesaretrueandwhichvaluesarefalse.1.2Determinethelinearityandshift-invarianceofthesyst

8、emsConsiderthefollowingthreesystemsSystem1:w(n)=x(n)-x(n-1)-x(n-2)Systcm2:y(n)=cos(x(n))System3:z(n)=nx(n)wherex(n)istheinput,w(n),y(n)andz(n)aretheoutputs.(1)Considerthethreeinputsignalsxl(n)=6(n)x2(n