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1、安徽大学2015—2016学年第2学期《数字信号处理》考查试卷（A卷）（开卷时间120分钟）院/系年级专业姓名学号题号一二三四五六七总分得分得分一、简答题（每小题5分，共20分）1.PleasetranslatethefollowingpassageintoChineseDigitalsignalprocessingandanalogsignalprocessingaresubfieldsofsignalprocessing.DSPapplicationsincludeaudioandspeechsignalprocessing,sonarandradarsignalprocessing,
2、sensorarrayprocessing,spectralestimation,statisticalsignalprocessing,digitalimageprocessing,signalprocessingforcommunications,controlofsystems,biomedicalsignalprocessing,seismicdataprocessing,amongothers.DSPalgorithmshavelongbeenrunonstandardcomputers,aswellasonspecializedprocessorscalleddigitalsi
3、gnalprocessors,andonpurpose-builthardwaresuchasapplication-specificintegratedcircuit(ASICs).Currently,thereareadditionaltechnologiesusedfordigitalsignalprocessingincludingmorepowerfulgeneralpurposemicroprocessors,field-programmablegatearrays(FPGAs),digitalsignalcontrollers(mostlyforindustrialappli
4、cationssuchasmotorcontrol),andstreamprocessors,amongothers.2.PleasedescribeSamplingTheorem.3.PleasegivethecalculationstepsofFFT-basedfastlinearconvolutionalgorithm.第5页共5页4.PleaselisttheplatformsforDSPImplementation,anddiscussthebenefitsanddrawbacksofeachimplementation第5页共5页得分l二、计算题（每小题10分，共40分）1.A
5、nFIRfilterisdescribedbytheI/Oequation:DetermineitstransferfunctionH(z)andimpulseresponseh(n)2.Calculatetheconvolutionofthefollowingfilterandinputsignals.h=[1,0,-1],x=[1,1,0,1,1]3.Computethez-transformofthefollowingsequencesanddeterminethecorrespondingregionofconvergence.(1)(2)第5页共5页4.ComputetheDFT
6、ofthefollowingsequences:(1)x1[n]={1,0,1};(2)x2[n]=u(n)-u(n-5)得分三、综合题（每小题20分，共40分）1.Usingz-transform,determinethetransferfunctionH(z)andfromitthecasualimpulseresponseh(n)ofthelinearsystemdescribedbyfollowingI/Odifferenceequations;(20)y(n)-0.5y(n-1)=x(n);DeterminealsothefrequencyresponseH(w),thepole
7、/zeropatternofthetransferfunctiononthez-plane,drawaroughsketchofthemagnituderesponse
8、H((w)
9、overtherighthalfofNyquistinterval0≤w≤p,第5页共5页2.Adigitalspeechsignalwascorruptedbythepower-lineinterference(50Hz),whichcou
