应答器上行链路信号接收系统的研究(6)
时间:2025-04-03
时间:2025-04-03
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应答器上行链路信号接收系统的研究
Abstract
WiththedevelopmentofrailwayenterpriseandtheconstructionofthePassengerDedicatedLinesandthehigh—speedrailway,theimprovementoftherailroadtransportcapacityandtherailwaytransportationefficiencyhasalwaysbeenthemostconcerningissueintherailywaysystemonthebasisofthepresentrailywaylines.、ⅣhetherinTBTCorCBTC,balisehasbeenwidelyusedandplayedallinfluentialroleasoneofthetransmittinginformationmethodsbetweenthetrainsandthetracks.Atpresent,baliseusedinChinaisnotyetdomestic.Balisetechnologyfromabroadcanonlymeettheneedsofthedevelopmentofrailwayconstruction.However,thecoretechnologyofthebalisehasbeenmonopolizedbyforeigncompanies.Designingandmanufacturingofbalisewithourownintellectualpropertyhavevitalrealisticsignificanceandeconomicvalue.
Basedontheanalysisofthecomposition,sorts,principlesandapplicationofbalise,thisthesisfocusesOiltheresearchofbaiiseuplink-signalreceiversystem.WiththecurrentsituationofChinesehigh-speedrailwaytraincontrolsystem,thisthesisproposesanewbaliseuplink-signalreceiversystemprogram.Thisprogramisdividedintothreemodules:dataacquisitionmodule,datademodulationmodule,decodingmodule.Accordingtothefeaturesofuplink signal,theparameterssuchasthequantityoftransmittinginformation,carrierfrequency。demodulationschcme,therateoftransmittinginformationandthetransmissionbandwidthwillbedetermined.Be圮.ausetherearemuchmoreinterferencesignalsinreceiversystems,theinformationmodulationmodeandthechoiceofcarrierfrequencyarcespeciallyimportant.Concerningoftheperformanceandcomputationalcomplexityofseveraldemodulationalgorithms,thisthesisadoptsthedifferentialdetectionsolutiontransfermodeinthesignaldemodulation.Designofdigitalfilterisanimportantpartinsignalprocessing.,11璩band.pass,low.passanddelayfiltersarcinvolvedindifferentialdemodulation.删SalgorithmiscarriedoutbⅣMATIAB.日托differentialdetectionsolutiontransfermodewillbeverifiedinsimulationbyusingoftheS …… 此处隐藏:707字,全部文档内容请下载后查看。喜欢就下载吧 ……
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