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1、南京理工大學(xué)碩士學(xué)位論文多通道數(shù)據(jù)采集存儲與通道校正姓名:裴健申請學(xué)位級別:碩士專業(yè):通信與信息系統(tǒng)指導(dǎo)教師:顧紅20100605碩士論文多通道數(shù)據(jù)采集存儲與通道校正摘要在雷達(dá)系統(tǒng)中,需要將大量實時數(shù)據(jù)采集存儲,然后進(jìn)行后期的數(shù)據(jù)分析處理,算法驗證等,這就需要高性能的數(shù)據(jù)采集系統(tǒng)。本論文基于5陣元無源雷達(dá),設(shè)計了一個多通道數(shù)據(jù)采集存儲系統(tǒng)并實現(xiàn)了多通道數(shù)據(jù)的通道校正。多通道數(shù)據(jù)采集存儲系統(tǒng)由信號采集板和信號存儲板構(gòu)成,信號采集板使用高精度ADC將模擬信號轉(zhuǎn)換為數(shù)字信號,數(shù)字信號由光纖發(fā)送至信號存儲板;信號存儲板通過光纖接收數(shù)據(jù),用DDR2SDRAM存儲器進(jìn)行
2、數(shù)據(jù)暫存,再經(jīng)過PCI接口將數(shù)據(jù)傳送至計算機(jī)內(nèi)存,從而完成數(shù)據(jù)采集存儲功能;最后,對采集的數(shù)據(jù)進(jìn)行通道幅相一致性校正。本文首先對系統(tǒng)方案進(jìn)行了論證,并討論了系統(tǒng)關(guān)鍵性技術(shù);然后給出了系統(tǒng)詳細(xì)硬件設(shè)計,包括FPGA及其外圍器件設(shè)計,時鐘配置以及電源分配等;接著重點論述了系統(tǒng)程序設(shè)計,從信號采集板程序設(shè)計、信號存儲板程序設(shè)計以及應(yīng)用程序設(shè)計三個部分進(jìn)行了分析,主要給出了硬件程序設(shè)計中數(shù)據(jù)位寬和時鐘速率不匹配的解決方案以及PCI驅(qū)動和應(yīng)用界面程序設(shè)計方法;最后給出并實現(xiàn)了一種通道幅相一致性校正方法,同時完成了數(shù)據(jù)采集存儲系統(tǒng)的測試。關(guān)鍵詞:多通道,數(shù)據(jù)采集,存儲,
3、通道校正,F(xiàn)PGA,光纖,PCI,DDR2Abstract碩士論文Inradarsystems,thereismassofdatashouldbeacquiredandstoredforafterwardanalyzingandalgorithmsverifying.Thusahi曲performancedataacquisitionsystemisnecessary.Wedesignamulti—channeldataacquisitionandstoragesystemandcompletethechannelcalibrationinthepaperb
4、asedorlaprojectofpassiveradarwithfiveantennas.Therealetwoseparatedboardsinthismulti—channeldataacquisitionandstoragesystem,dataacquisitionboardanddatastorageboard.Onthedataacquisitionboard,theanalogsignalissampledbyhighperformanceADCandconvertstodigitsignal,whichisthentransmittedtO
5、datastorageboardbyFiberchannel.Atthesametime,thedigitsignalisreceivedbyFiberchannelonthedatastorageboard,storedintheDDR2SDRAMandthentransmittedtoacomputer.Afterthat,Wecalibratetheacquisitiondatabycalibrationfilters.First,thesystemschemeisproposedandarguedinthepaperandthemaintechnol
6、ogyisdiscussed.Second,thesystemhardwareisdesigned,inwhichtheFPGAdesigning,clockarrangementandpowerdistributionarerealized.Third,thesoftwareofsystemisprogrammed,whichismadeofthreeparts,thedesigningofdataacquisitionboard,thedesigningofdatastorageboardandthedesigllingofapplicationsoft
7、ware.Inthesoftware,theunmatchedofdatawidthsandclockratesissolvedandthePCIdriveranddisplayinterfacedesigningarcdiscussed.Atlast,thechannelcalibrationisdissertatedandrealizedbyMatlab,andafterthatthesystemiStested.Keyword:Multi-Channel,Dataacquisition,Datastorage,channelcalibration,FP
8、GA,F(xiàn)iber,PCI,DDR2Ⅱ聲明本學(xué)位論文是