30632.多通道高速信號采集與陣列信號預(yù)處理技術(shù)研究

1、華中科技大學(xué)碩士學(xué)位論文多通道高速信號采集與陣列信號預(yù)處理技術(shù)研究姓名：李毅申請學(xué)位級別：碩士專業(yè)：電磁場與微波技術(shù)指導(dǎo)教師：譚萍20110221華中科技大學(xué)碩士學(xué)位論文華中科技大學(xué)碩士學(xué)位論文IIAbstractThelightningdetectionsystemplaysakeyroleinthelightningdisasterpredictionprevention，thispapermainlystudiesthelight

2、ningdetectionsystemfmultichannelsignalreceivingprocessingmethodintheFPGA.Afterproposingthedatapreprocessingprocessofthelightningdetectionsystemthefunctionsrequirementsofeachmodulethispaperanalysesthemultichannelhighspeed

3、signalreceivingmodule.Itdiscussestheprocessmethodofreceivingthelightningsignalbyantennaarray.Thenthereceiver’sperfmanceofthemoduleisanalyzedfromwhichthispapercanconfirmthattheperfmanceoftheADCreceivermodulehasmettherequi

4、rements.Indertoextractthundersignalfdataanalysisprocessinginthefollowingsubsequentprocessofdatapreprocessingthispaperfocusesonthedetectionoflightningsignal.Inthispartbystudyingthefeaturesofthelightningsignalnoiseenvironm

5、entthispaperproposesthecrespondingconstantfalsealarmalgithmfdetectionmakesimprovementsaccdingtothepracticaldemsofthesystem.thenitshowshowthealgithmisrealizedintheFPGAafterthedetectionthresholdisdetermined.Nexttoreducethe

6、pressureofthedataprocessingtransmissionthispaperstudiestheadaptivequantizationprocessingmethodftheeffectivesignal.InthispartcomparedwiththeclosedloopAGCmethodtheopenloopcontrolmethodisprovedtobemesuitablefthesystem.Final

7、lyafterthequantizationprocessindertousetheMUSICalgithmthispaperexpoundsrealizedthecovariancematrix.Consideringofthetraditionalcovariancecalculationmethodthispapermakesresearchofanewcovariancecalculationmethodbasedontheco

8、variancematrixofrealnumber.Aftercomparingthetwomethodsitconfirmsthatthesystemusingtherealnumbermethodstocalculatecovarianceismuchmesuitable.Keywds:Multichannelreceiver；ConstantFalseAlarmRate；Detection；AdaptiveQuantizatio