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簡(jiǎn)介：碩士學(xué)位論文MASTERSDISSERTATION論文題目基于MATLAB的65MN液壓機(jī)活動(dòng)橫梁混合糾偏建模與仿真作者姓名作者姓名邵利陽(yáng)學(xué)科專業(yè)學(xué)科專業(yè)材料加工工程指導(dǎo)教師指導(dǎo)教師唐景林教授2017年5月中圖分類號(hào)TG3154學(xué)校代碼10216UDC621密級(jí)公開(kāi)工學(xué)碩士學(xué)位論文工學(xué)碩士學(xué)位論文基于MATLAB的65MN模鍛液壓機(jī)活動(dòng)橫梁混合糾偏建模與仿真碩士研究生邵利陽(yáng)導(dǎo)師唐景林教授申請(qǐng)學(xué)位工學(xué)碩士學(xué)科專業(yè)材料加工工程所屬學(xué)院機(jī)械工程學(xué)院答辯日期2017年5月授予學(xué)位單位燕山大學(xué)

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簡(jiǎn)介：分類號(hào)密級(jí)UDC編號(hào)桂林電子科技大學(xué)碩士學(xué)位論文題目基于NS2的IEEE802154仿真研究與性能分析（英文英文）SIMULATIONRESEARCHANDPERFORMANCEANALYSISOFIEEE802154BASEDONNS2研究生姓名金東方指導(dǎo)教師姓名指導(dǎo)教師姓名、職務(wù)職務(wù)李紹文（高工）申請(qǐng)學(xué)位門類工學(xué)學(xué)科、專業(yè)計(jì)算機(jī)應(yīng)用技術(shù)提交論文日期2010年9月論文答辯日期2010年12月2010年12月20日摘要–I–摘要無(wú)線個(gè)域網(wǎng)（WPAN）定位于短距離無(wú)線通信應(yīng)用，其可以使用的通信協(xié)議有多種，分別應(yīng)用在不同的場(chǎng)合。IEEE802154協(xié)議是無(wú)線個(gè)域網(wǎng)中使用的一種標(biāo)準(zhǔn)，自推出以來(lái)，它就被廣泛認(rèn)為是非常適合于低速率、低成本、低功耗、低復(fù)雜度和短距離應(yīng)用的最重要的通信協(xié)議之一，并被作為低速率無(wú)線技術(shù)實(shí)現(xiàn)方案的一個(gè)重要基礎(chǔ)，廣泛應(yīng)用于交互玩具、工農(nóng)業(yè)自動(dòng)化等領(lǐng)域。本文首先構(gòu)建了一個(gè)支持活躍時(shí)段休眠的IEEE802154網(wǎng)絡(luò)應(yīng)用模型，并對(duì)其進(jìn)行了需求分析的研究。在此基礎(chǔ)之上，針對(duì)該網(wǎng)絡(luò)應(yīng)用模型提出了兩點(diǎn)提高節(jié)點(diǎn)能量效率的措施其一是允許節(jié)點(diǎn)在超幀活躍周期休眠，其二是減小信道競(jìng)爭(zhēng)窗口的長(zhǎng)度。本文還提出了一種利用CSMA/CA空閑信道監(jiān)聽(tīng)前退避時(shí)隙的延時(shí)來(lái)喚醒節(jié)點(diǎn)的方法，從而為實(shí)現(xiàn)射頻芯片狀態(tài)間的合理有效轉(zhuǎn)換提供支持。本文還引入了單位能量傳輸?shù)淖止?jié)數(shù)（即能量效率）這個(gè)性能評(píng)估指標(biāo)，以便于研究不同網(wǎng)絡(luò)規(guī)模下發(fā)送速率對(duì)本文網(wǎng)絡(luò)模型的能量利用率所產(chǎn)生的影響。鑒于直接利用當(dāng)前的NS2工具不能對(duì)本文的網(wǎng)絡(luò)應(yīng)用模型進(jìn)行仿真分析，在對(duì)NS2及IEEE802154模擬器進(jìn)行充分研究的基礎(chǔ)上，結(jié)合提出的節(jié)能措施需要模擬器實(shí)現(xiàn)的功能，本文對(duì)IEEE802154模擬器進(jìn)行了有針對(duì)性的修改。修改主要實(shí)現(xiàn)了節(jié)點(diǎn)在休眠空閑、空閑接收狀態(tài)間的轉(zhuǎn)換，以支持超幀活躍周期內(nèi)進(jìn)入休眠狀態(tài)后可以喚醒節(jié)點(diǎn)來(lái)發(fā)送數(shù)據(jù)；修改還實(shí)現(xiàn)了競(jìng)爭(zhēng)窗口長(zhǎng)度的變化，以便能夠分析減小信道競(jìng)爭(zhēng)窗口長(zhǎng)度后網(wǎng)絡(luò)的性能。在用修改后的模擬器進(jìn)行仿真時(shí)，網(wǎng)絡(luò)屬性的設(shè)置與以往有所不同，本文給出了詳細(xì)的網(wǎng)絡(luò)配置方法。為了驗(yàn)證所提出的節(jié)能技術(shù)對(duì)網(wǎng)絡(luò)應(yīng)用模型性能的影響，文中利用基于NS2的仿真實(shí)驗(yàn)對(duì)之進(jìn)行了深入和細(xì)致的分析，并分析了ACK機(jī)制對(duì)該模型的性能影響，進(jìn)而驗(yàn)證了不使用MAC層的ACK幀及減小競(jìng)爭(zhēng)窗口長(zhǎng)度這一個(gè)思想的合理性和有效性。大量的仿真分析表明，本文提出的上述兩種提高能量效率的措施能夠很好地滿足文中網(wǎng)絡(luò)模型的應(yīng)用需求，在不對(duì)延時(shí)和吞吐量等重要指標(biāo)帶來(lái)負(fù)面影響的同時(shí)能夠提高能量的利用率。關(guān)鍵詞低速率無(wú)線個(gè)域網(wǎng)IEEE80154時(shí)隙CSMA/CACAP時(shí)段休眠能量效率NS2仿真

簡(jiǎn)介：北京交通大學(xué)碩士學(xué)位論文基于PLC的分區(qū)運(yùn)行控制仿真系統(tǒng)研究姓名褚越杰申請(qǐng)學(xué)位級(jí)別碩士專業(yè)交通信息工程及控制指導(dǎo)教師徐洪澤20060301“J￡≮0ABSTRACTHI咖印CCDMA舀EVTR血ISANEWTYPEVEHIDE，WHICHISLEVITATED柚DORIENTEDBYEL黜姍A扣CTISMFORCC，刪DRIVENBYLINCARMOTORS．C0MPA∞ED、】LRITH仃ADI虹∞ALCONVCYANCCMEANS，ITH弱THEADVAMAGESOFHIGHSPCED’SM∞TH，SAFNY仃∞P01LUTION柚DLOW髓E唱Y∞LLS哪E．T撇RE，ITISSI舯JFICANTTOSTIIDY徹HIGHSPEEDMA醇EVTRAIN．THEN咖AL0PEMTINGOFTHEWHOLEMA雷EVSYSTCMISENSUREDBYTTLE0PERATIONCONTROLSYSTCM0CS．THEREFORCTHEDECEN仃ALIZEDC0N僦S弘T鋤DCSOFHI咖SPECDM珂CVTRAINISSMDIEDINTHISTH髓IS，蛆DMEFLLNCTIONOFDCSISSIMLLLATCDWITHSIEM∞SS7．300PLCINTLIEDIS蛐TI∞，RCSE眥HISFOCUSEDONTHEFOLL袖鏟FI娼TLY，BASEDONTLLE如ALYSISOFTHEHIGHSPEEDMAGLCVOCSOFG鋤姐Y如DJAPAN，THESYSTEMDESIGNSCH鋤EOFDCC衄衄ALIZEDONTMLSJMULAD蚰SRSTEMPCSSWIULPLCISPFOPOSCD，柚DLHEFILNC曲NOFDCSISSTUDIED粕DSIMULATCD．SECONDLY’B弱ED0NTILEFILⅡC舡ONREQLLIREMENT鋤AIYSIS趾DSYSTEMS劬，CTIL陀DCSI印OFD墨SANDTHECHANDEIISTICSOFSIEME璐PLC柚DITSPROGRAM加IDGENVIMNM曲TSTEP7V5．2，TLLESOFT_WARCSMLDU∞OFDCSS矩DITSFILNCTIONMODLLL偽INCLUMⅡGDECEN叫IZEDC0N仰LC0MPUTER①CC，DCCCNTRALISCDSAFETYOMPUTERDSC，DECEN刪IZEDSWI“CHMODME蛆DDECENTRAL泌DPMPULSIONSHUTO丘C0MPUTERISDESI鯛ED．11L硼LY，B鵝EDONTHE∞腳ARESTNLCTIM0FDCSSAⅡDITSFILN硝0NMODULES，THETASK柚DINS譏LCTIONEXECUTIONNOWSA陀舀VENINDETAILACOORDINGTOTHESOFTWARCSTMCTILREANDFILⅡCCI衄OFEACHMODLLLE．THESTUDYISS打ESSEDONTHCRCALIZATION0FDSC∞腳盯E．WITHRAILMYCOMPUTERB髓EDJNTCDODDNGTCCHNOLOGY鋤DITSREALIZATIONMETLLOD，TLIEF仰CTI衄OFMAGLEV扛AILLOP盱ATIONCOMML卸DSAFCTYASSURALLCCOFDSCISREALIZED．FINAⅡY，THENL皿JNGPMCCSSOFHIGHSPEEDMA百EV打AINISANAIYZED，ANDITSFLOWIS舀VENACCORDINGTOTHEMUTESOFASIMPLELINE．ME鋤WLLILE，THELADDEFCHANSOF血EIMPONAIITTACHEARCPMPOSED．【KEYWORDS】MA醇EV，DCCCNIR此CDCONTROLS舛鋤，SIMULATION，PLC一Ⅱ一

簡(jiǎn)介：分類號(hào)______________________________密級(jí)______________________________ＵＤＣ______________________________編號(hào)______________________________全日制專業(yè)學(xué)位碩士論文全日制專業(yè)學(xué)位碩士論文基于基于PERTPERTSD混合系統(tǒng)混合系統(tǒng)的公路工程項(xiàng)目工期公路工程項(xiàng)目工期建模仿真建模仿真研究研究學(xué)位申請(qǐng)人陳海龍學(xué)科領(lǐng)域建筑與土木工程校內(nèi)導(dǎo)師蔣根謀教授答辯日期獨(dú)創(chuàng)性聲明獨(dú)創(chuàng)性聲明本人鄭重聲明所呈交的學(xué)位論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表和撰寫的研究成果，也不包含為獲得華東交通大學(xué)或其他教育機(jī)構(gòu)的學(xué)位或證書所使用過(guò)的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說(shuō)明并表示了謝意。本人簽名_______________日期____________關(guān)于論文使用授權(quán)的說(shuō)明關(guān)于論文使用授權(quán)的說(shuō)明本人完全了解華東交通大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，即學(xué)校有權(quán)保留送交論文的復(fù)印件，允許論文被查閱和借閱。學(xué)校可以公布論文的全部或部分內(nèi)容，可以采用影印、縮印或其他復(fù)制手段保存論文。保密的論文在解密后遵守此規(guī)定，本論文無(wú)保密期內(nèi)容。學(xué)生本人簽名日期校內(nèi)導(dǎo)師簽名日期校外導(dǎo)師簽名日期

簡(jiǎn)介：合肥工業(yè)大學(xué)碩士學(xué)位論文基于MSCMARC雙層復(fù)合材料軸套成形的仿真研究姓名于軍濤申請(qǐng)學(xué)位級(jí)別碩士專業(yè)機(jī)械制造及其自動(dòng)化指導(dǎo)教師焦明華20080301RESEARCHONFORMINGSIMULATIONFORBILAYERCOMPOSITEBUSHESBYFINITEELEMENTMETHODBASEDONMSC．MARCABSTRACTINVIEWOFTHEPRESENTSITUATIONINTHEFORMINGPROCESSOFCOMPOSITEBUSHES，SUCHASTHEBACKWARDSOFTHEPROCESSINGTECHNOLOGY，THELOWPRECISIONOFCOMPOSITEBUSHES，THISTHESISFOCUSEDONTHERESEARCHOFFORMINGPROCESSSIMULATIONFORBILAYERCOMPOSITEBUSHESBASEDONMSC．MARC．THEFORMINGPROCESSESOFBUSHESWERESIMULATEDBYWRAPPINGWAYSANDENTWISTINGWAYSRESPECTIVELY，THERESULTSWEREEVALUATEDCOMPREHENSIVELY，ANDTHEKEYEFFECTSONTHEFORMINGPRECISIONOFBILAYERCOMPOSITEBUSHESWERESTUDIEDINDETAIL．FIRSTLY，THERESEARCHESONTHEDEVELOPMENTANDAPPLICATIONOFCOMPOSITEBUSHESWEREREVIEWEDTHECURRENTRESEARCHSITUATIONOFBILAYERFORMINGBUSHANDFINITEELEMENTANALYSISOFSHEETFORMINGWEREANALYZED；THEFORMINGPROCESSOFBUSHESWASSYSTEMATICALLYANDTHEORETICALLYANALYZEDBYCLASSICALLAMINATIONTHEORY．WARPINGANDENTWISTINGFORMINGPROCESSWEREINTRODUCED．SECONDLY，BASEDONFINITEELEMENTTHEORY，TWOSIMULATIONOFFORMINGPROCESSWEREESTABLISHEDCOMPLETELYFORONETYPEOFBUSHES，THESIMULATIONPROCESSINMSC．MARCWEREINTRODUCEDINDETAIL，SUCHASSETTINGMATERIALPROPERTIES、GENERATINGMESHANDSETTLINGCONTACTETA1．FURTHERMORE，SOMEPROBLEMSINTHESIMULATIONWEREDISCUSSEDANDHANDLED．THIRDLY，THESIMULATEDRESULTSSUCHASFORMINGQUALITYANDFORMINGPRECISIONWEREEVALUATEDBYCOMPREHENSIVEWAYS．FOREXAMPLE，DIMENSIONALPRECISIONWASEVALUATEDBYUSINGREGRESS．THETHICKNESSOFTHEPOWDERLAYERANDMODELCLEARANCEWERETHEKEYEFFECTSONSPRINGBACK、BUCKLINGANDDIMENSIONALERROLTHERESULTSSHOWTHATTHEENTWISTINGPROCESSISMOREBENEFITFORHIGHPRECISIONBUSHESCOMPAREDWITHTHEWRAPPINGPROCESS．THEESTABLISHMENTOFFINITEELEMENTMODELS，SIMULATIONOFWRAPPINGANDENTWISTINGPROCESS，ANDCOMPREHENSIVEEVALUATIONOFTHERESULTSINOURWORKWILLBEVALUABLEFORTHEDIEDESIGN，THEFORMINGTECHNOLOGYANDTHEIMPROVEMENTOFTHEFORMINGPRECISIONOFCOMPOSITEBUSHES．KEYWORDSBILAYERCOMPOSITE，BUSHES，F(xiàn)ORMINGTECHNOLOGY，PRECISIONANALYSIS，F(xiàn)INITEELEMENTANALYSIS

簡(jiǎn)介：分類號(hào)UD≮‘78G53L學(xué)校代號(hào)10561密埋學(xué)“號(hào)200235000201022華南理工大學(xué)碩士學(xué)位論文基于IEEE802．16A協(xié)議基帶傳輸系統(tǒng)仿真研究楊謙指旨教師呈遞勛熬撞皇王蔓信。墾堂隧申請(qǐng)學(xué)位級(jí)別』主亟主專業(yè)名稱電墅量丕筮篼義提交幾期2005．5論文答辯日期200旦』’學(xué)位授予單位和口期臣直堡二盍堂答辯委員會(huì)豐席論文評(píng)閱人搓翊壑盛ABSTRACTNOWADAYS，WITHTHEHIGHDEVELOPMENTOFCOMMUNICATIONTECHNOLOGY，THEDEVELOPMENTTRENDOFNETWORKISMOBILE，WIDEBANDANDPROVIDINGINTEGRATEDSERVICESMEANWHILE，ITISCRITICALTODEVELOPCOMMUNICATIONTECHNOLOGYBASEONSTANDARD，SOASTOENSURETHECOMPATIBILITYOFPRODUCTSANDSOLUTIONSFROMDIFFERENTEQUIPMENTPROVIDERS．WIMAX，WHICHISABROADBANDWIRELESSACCESSTECHNOLOGYBASEONIEEE802．16SERIESSTANDARD．CANBEUSEDFORANUMBEROFAPPLICATIONS，INCLUDING“LASTMILE”CONNECTIONS．ANDCANBEUSEDFORTHECONNECTION‘LASTMILE’，ALSO．THE1EEES02．16ESTANDARD，SUPPORTINGMOBILITY,ISONTHEWAY，SO，WIMAXISHOTINTHE“ELDOFCORNMUNICATION．THISARTICLEPUTEMPHASISONHOWTOSETUPASIMULATIONPLATFORMFORTHEVERIFR7INGOFBASEBANDALGORITHMSANDANALYSISOFSYSTEMPERFORMANCE．ONTHEDEEPRESEARCHOFBASEBANDTRANSMISSIONOFSCASYSTEMANDREQUIREOFPRODUCTSACCORDINGTOIEEE802．16APROTOCOL，WESETUPASIMULATIONPLATFORMANDPLANTTHEOPTIMIZEDCODEOFVERIFIEDALGORITHMSTOPHYSYSTEMBOARD．INADDITION，WEALSODIDSOMERESEARCHONTHECRITICALALGORITHMSOFOFDMSYSTEM，INCLUDESSYMBOLSYNCHRONIZATIONANDESTIMATIONOFFREQUENCYOFFSET．THEFIRSTTWOPARTOFTHISARTICLEINTRODUCESTHEDEVELOPMENTOFWIMAXTECHNOLOGYANDCORRESPONDINGSTANDARDIEEE802．16A．THEN，ADETAILDESCRIPTIONOFMODULESOFSCABASEBANDTRANSMISSIONSYSTEMS，WHICHINCLUDESFORWARDERRORCORRECTION，MODULATIONANDDEMODULATION，SYNCHRONIZATIONOFRECEIVER，MEASUREMENTOFBITERRORRATEANDSIGNALFIGURESETC，WASMADE．ATLASTWEGIVETHECOMPUTERSIMULATIONFLOWCHARTFORPERFORMANCEANALYSISOFSCAANDOFDMBASEBANDTRANSMISSIONSYSTEMS，ANDMAKEADETAILDESCRIPTIONOFALLTHEMODULES’INTERFACEOFSCASYSTEM．ANDMAKEANANALYSISOFSIMULATIONRESULTSOFSCASYSTEMS．WEALSODIDSOMERESEARCHONTHESYNCHRONIZATIONOFOFDMSYSTEMINTHISPARTANDCOMEUPWITHANAPPLICABLEALGORITHM．FUTURE，ONTHEFUNCTIONALSIMULATIONOFMACSUBLAYER，ASOFTWAREANDHARDWARECOMBINEDPRODUCTSPROJECTISPROVIDED．KEYWORDSIEEE80216A，BASEBANDSYSTEMSIMULATION，BROADBANDWIRELESSACCESS，WIRELESSMAN，SYNCHRONIZATION，OFDMII

簡(jiǎn)介：（申請(qǐng)工學(xué)碩士學(xué)位論文）（申請(qǐng)工學(xué)碩士學(xué)位論文）基于JACKSON排隊(duì)網(wǎng)絡(luò)的集裝箱碼頭物流系統(tǒng)仿真模塊庫(kù)研究培養(yǎng)單位培養(yǎng)單位物流工程學(xué)院物流工程學(xué)院學(xué)科專業(yè)學(xué)科專業(yè)機(jī)械工程機(jī)械工程研究生馬向宇馬向宇指導(dǎo)教師指導(dǎo)教師周強(qiáng)周強(qiáng)教授教授2017年5月基于JACKSON排隊(duì)網(wǎng)絡(luò)的集裝碼頭物流系統(tǒng)仿真模塊庫(kù)研究馬向宇武漢理工大學(xué)

簡(jiǎn)介：南京郵電學(xué)院碩士學(xué)位論文摘要學(xué)科、專業(yè)_I學(xué)通信與信惠系統(tǒng)研究方向移動(dòng)通信與無(wú)線技術(shù)作者2002級(jí)研究照顧曉亮指導(dǎo)教師酆廣增題甚基于IEEE802．1LA的物理層仿真乎臺(tái)的搭建以及MIMO技術(shù)的研究英文題目THEPHYSICALLAYERSIMULATIONPLATFORMBASEDONIEEESTANDARD802．1LAANDMIMOTECHNOLOGY主題詞0FDMMIMOKEYWORDSOFDMMIM0仿真平臺(tái)寬帶無(wú)線接入802．1LA空時(shí)分組編碼SIMULATIONPLATFORMBWA802．1LASTBC南京LLL|JIU學(xué)院壩F．論文ABSTRACTABS仃ACTOFDMORTHOGONALFREQUENCYDIVISIONMULTIPLEXINGISNOWONEOFTHEHOTTOPICSOFRESEARCHANDAPPLICATIONINHIGHRATEWIRELESSCOMMUNICATIONFIELD，ANDGENERALLYREGARDEDASONEOFTHECORETECHNOLOGIESOFTHE4THMOBILECOMMUNICATIONSYSTEMDUETOITSGOODPERFORMANCEAGAINSTNOISEANDMULTIPATHDELAY,ANDDUETOITSHIGHFREQUENCYEFFICIENCY．THEPHYSICALLAYEROFTHEWIRELESSLOCALAREANETWORKSCONFORMEDTOIEEE802．11AALSOADOPTSOFDM．INTHISTHESIS，BASEDONIEEESTANDARD802．1LA，F(xiàn)OCUSISPUTONTHEDESIGNOFTHEPHYSICALLAYER’SSIMULATOR．THENTHETECHNOLOGYOFMIMOMULTIPLEINPUTMULTIPLEOUTPUTISSTUDIEDBYTHESIMULATIONPLATFORM，WHICHCANIMPROVETHEPERFORMANCEOFTHESYSTEM．THISTHESISFIRSTLYPRESENTSTHEBASICPRINCIPLEANDREALIZATIONOFOFDMSYSTEM，GIVESCOMPONENTSOFOFDMSYSTEM，BUILDSTHESYSTEMMODELANDDISCUSSESAFEWKEYPROBLEMSOFREALIZINGOFDMSYSTEM．NEXT，IEEESTANDARD802．1LAISINTRODUCED，LETUSLEARNHOWTOFORMAPACKETANDHOWTOTRANSMITANDRECEIVEIT．THENBASEDONTHESTANDARD，THEPHYSICALLAYER’SSIMULATORISDESIGNEDWHICHINCLUDESTHREEPARTSTRANSMITTER,CHANNELANDRECEIVER．MEANWHILETHESEPARTSCANBEDIVIDEDINTOMANYSMALLONES．THETRANSMITTERCONSISTSOFCONVOLUTION，PUNCTURE，MODULATION、IFFT，GUARDINTERVALANDPREAMBLE．THECHANNELCANBEAWGNCHANNELORRAYLEIGHCHANNEL．THERECEIVERISREVERSEPROCEDUREOFTHETRANSMITTER．SIMULATIONSTUDIESHAVEBEMADEATCONVOLUTION，MODULATION．INTERLEAVEANDVITERBIDECODING．ONTHEBASISOFTHEABOVE．THETHESISALSOINTRODUCESTHESYSTEMOFMIMOOFDMANDTHETECHNOLOGYOFDIVERSITY．EMPHASISISPUTONTHESPACETIMECODINGSCHEME，ESPECIALLYONTHEENCODINGANDDECODINGALGORITHMSOFORTHOGONALSTBC．SOFTWARESIMULATIONPLATFORMOFMIMOOFDMISALSOSETUPTHROUGHWHICHTHECONDITIONSOFONEOUTPUTANDONEINPUTANDMULTIOUTPUTANDMULTIINPUTAREDISCUSSED．INRECEIVERSIDETHEMAXIMUMLIKELIHOODARITHMETICISUSED．FINALLY，SOMECONCLUSIONSAREDRAWN．

簡(jiǎn)介：北京郵電大學(xué)碩士學(xué)位論文基于IEEE80216E的OFDMA物理層研究與仿真姓名陳卓申請(qǐng)學(xué)位級(jí)別碩士專業(yè)信號(hào)與信息處理指導(dǎo)教師王玉良20080301北京郵電大學(xué)碩士論文基于IEEE802．16E的OFDMA物理層研究與仿真出了頻率同步誤差和符號(hào)定時(shí)同步誤差對(duì)系統(tǒng)性能的影響。關(guān)鍵詞IEEE802．16EOFDMA仿真平臺(tái)信道編碼空時(shí)編碼同步H

簡(jiǎn)介：隸。初大I警碩士學(xué)位論文基于IEEE802．1LAJ協(xié)議的無(wú)線局域網(wǎng)系統(tǒng)級(jí)仿真及性能分析東南大學(xué)學(xué)位論文獨(dú)創(chuàng)性聲明本人聲明所呈交的學(xué)位論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過(guò)的研究成果，也不包含為獲得東南大學(xué)或其它教育機(jī)構(gòu)的學(xué)位或證書而使用過(guò)的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中作了明確的說(shuō)明并表示了謝意。東南大學(xué)學(xué)位論文使用授權(quán)聲明東南大學(xué)、中國(guó)科學(xué)技術(shù)信息研究所、國(guó)家圖書館有權(quán)保留本人所送交學(xué)位論文的復(fù)印件和電子文檔，一可以采用影印、縮印或其他復(fù)制手段保存論文。本人電子文檔的內(nèi)容和紙質(zhì)論文的內(nèi)容相一致。除在保密期內(nèi)的保密論文外，允許論文被查閱和借閱，可以公布包括刊登一論文的全部或部分內(nèi)容。論文的公布包括刊登授權(quán)東南大學(xué)研究生院辦理。研究生簽名』雌導(dǎo)師簽名日期

簡(jiǎn)介：華南理工大學(xué)碩士學(xué)位論文基于IEEE80216A的前向糾錯(cuò)及均衡技術(shù)的算法設(shè)計(jì)及仿真研究姓名劉婷婷申請(qǐng)學(xué)位級(jí)別碩士專業(yè)通信與信息系統(tǒng)指導(dǎo)教師尹俊勛20050501ABSTRACTABSTRACTTHETRENDOFACCESSNETWORKTECHNOLOGYISFROMNARROWBANDNETWORKTOBROADBANDNETWORK．FROMOIRCUITSWITCHEDNETWORKTOPACKETSWITCHEDNETWORK．BROADBANDWIRELESSACCESSTECHNOLOGYHASBECOMEAHOTPOINTINCOMMUNICATIONMARKETDUETOITSADVANTAGESSUCHASFLEXIBILITY，SHORTCONSTRUETIONPERIOD，OONVENIENTMAINTENANCE，LOWCOST，ROBUSTAGAINSTDISASTER，ETC．INAPRIL，2004，IEEE802COMMITTEERELEASEDTHEAIRINTERFACESTANDARD802．16AFOR211GHZFIXEDBROADBANDWIRELESSACCESSSYSTEMS．DERIVEDFROMTHEINNOVATIONFUNDPROJECT，BASEDONIEEE802．16A，THETHESISDESCRIBEDTHEFLOWOFPHYLAYERBASEBANDSYSTEMUNDERSCAMODULATIONANDOFDMMODULATION，PUTEMPHASISONTHERELATEDFECANDEQUALIZATIONTECHN0109Y．FECISAWIDELYAPPLIEDREDUNDANTTECHNOLOGYTOLOWERTHESYSTEMCOSTANDTOMAKETHESYSTEMRELIABLE．THETHESISINTRODUCESTHREEFECMETHODSREGULATEDIN802．16A．STADIESTHEAPPLICATIONOFCONCATENATEDCODESINDIFFERENTMODULATIONSYSTEM，POSTESONERSDECODINGALGORITHMWITHTHEPUNCTUREDPARITYBYTES，COMPARESTHEPERFORMACEOFTHREETCMDECODINGMETHODS，GIVESRELIABLESIMULATIONSTUDYANDPOSSIBLEHARDWAREIMPLEMENT．EQUALIZATIONISACOUNTERACTEDTECHNOLOGYTOREVISETHECHANNELTRANSFERFUNCTIONUSINGMETHODSOFTIMEDOMAINANDFREQUENCYDOMAIN．BASEDONTHEINTRODUCTIONOFEQUALIZATION’STHEORY，ORITORIONANDALGOTITHMS，THETHESISGIVESTHEEQUALIZATIONHANDLINGFLOWOFSCASYSTEM．1ISTSMANYSIMULATIONDATASACCORDINGTODIFFERENTCONFIGURATIONOFEQUALIZATION’SPARAMETERS．THETHESISALSOANALYSESTHEEQUALIZATION’STHOUGHTSINOFDMSYSTEM，ANDAPPLIESTHEMTOTHESCASYSTEM，POSESTHECONCEPTOFFREQUENCEDOMAINEQUALIZATIONOFSCASYSTEM，WHICHCANRESOLVETHEMAINCHOKEPOINTOFSCASYSTEM．THETHESISEMPHASIZESTHEALGORITHMS’DESIGNOFBASEBANDHANDLING．OPTIONALALGORITHMSAREPOSEDASMANYASPOSSIBLE，THECOMPAREDRESULTSHOWSTHATTHEREISNOBESTALGORITHM，ABALANCESHOULDBEMADEBETWEENPERFORMANCEANDCOMPLEXITY．ANOTHERCONTRIBUTEOFTHISTHESISISTOSHOWAGREATDEALOFMATURITYSIMULATIONCURVES．TOAGREEWITHTHEPRACTICE

簡(jiǎn)介：天津大學(xué)碩士學(xué)位論文基于IEEE80220協(xié)議FLASHOFDM系統(tǒng)的仿真與研究姓名單娜娜申請(qǐng)學(xué)位級(jí)別碩士專業(yè)通信與信息系統(tǒng)指導(dǎo)教師侯春萍20080501ABSTRACTWITHTHEDEVELOPMENTOFTHEMOBILEBROADBANDWIRELESSACCESSTECHNOLOGY，ANEWKINDOFTECHNOLOGYWHICHISNAMEDFLASHOFDMHASAPPEARED．ANDTHETECHNOLOGYBECOMESONECOLEOFTHEIEEE802．20AGREEMENT．FLASHOFDMTECHNOLOGYISTHEFASTLOWLATENCYACCESSWITHSEAMLESSHANDOFFORTHOGONALFREQUENCYDIVISIONMULTIPLEXING．ITCONSISTSOFLDPC，HIGHSPEEDFREQUENCYHOPPINGANDTHEHIGHEFFICIENCYOFDMMODULATION．LDPCHASTHECHARACTERISTICOFTHEHIIGHCODINGGAIN，THEHIGHDECODINGPERFORMANCEANDTHEPROPERTYCLOSINGTOTHESHANNONLIMIT．ITCANIMPROVETHEOFDMPERFORMANCEEFFECTIVELYINMULTIPATHS。HIGHSPEEDFREQUENCYHOPPINGISSTRONGINCAPABILITYFORMULTIPATHDISTURBANCE．ITCANGREATLYIMPROVETHERELIABILITYOFDATATRANSFERS．FLASHOFDMSYSTEMCANSUPPORTTHEMULTIUSERDATATRANSFERS，ANDALSO，CANPROVIDETHEBETTERSECURITY．FLSHOFDMSYSTEMMAKESTHEDATACOMMUNICATIONANDTHEVOICECOMMUNICATIONCOMETRUE．THEIPLAYERSTRUCTUREINTHESYSTEMCARLSATISFYUSERS’REQUIREMENTSOFTHEHI}GHBANDWIDTHANDQOS．SOITHASBETTERNETWORKCOMPATIBIL時(shí)ANDSEALABILITYTHANOTHERCOMMUNICATIONSYSTEM．ITPROVESTHATTHEFLASHOFDMSYSTEMHASTHEADVANCEDTECHNOLOGY，THEWELLTRANSMISSIONPERFORMANCEANDTHEWELLPROSPECTOFAPPLYINGBYTHEANALYZINGOFTHEBITERRORRATEANDTHEPLANISPHELE．TOIMPROVETHEFLASHOFDMSYSTEM，THEALGORITHMUSESTHELMMSEECHANNELESTIMATIONALGORITHM．ITREDUCESTHESYSTEM’SERRORRATE，INCREASESTHECHANNELESTIMATIONACCURACYANDIMPROVESTHESYSTEMPERFORMANCE．ATPRESENT,THEREISTHETHEORETICDESCRIPTIONOFTHEWHOLEFLASHOFDMSYSTEM．THEREISNORESEARCHOFTHECONCRETEDATAOFTHEPHYSICALLAYERINTHESYSTEM．THEARTICLEFILLSAGAPINTHEFIELD．ITAFFORDSTHEREFERENCEMODELANDTHEDATAFOROTHERRESEARCHER,BYEMULATIONMODE．ANDALSO，THEARTICLEHASANAPOCALYPSEFUNCTIONINTHERESEARCHANDAPPLICATIONONIT．KEYWORDSFLASHOFDM，LDPC，F(xiàn)REQUENCYHOPPING，MOBILEBROADBANDWIRELESSACCESS

簡(jiǎn)介：代號(hào)分類號(hào)學(xué)號(hào)密級(jí)代號(hào)分類號(hào)學(xué)號(hào)密級(jí)1070110701TN919TN919公開(kāi)公開(kāi)題（中、英文）（中、英文）目基于基于IEEE80216E的OFDMA系統(tǒng)仿真與研究系統(tǒng)仿真與研究SIMULATIONANDRESEARCHOFTHEOFDMASYSTEMBASEDONIEEE80216E作者姓名作者姓名王寧指導(dǎo)教師姓名、職務(wù)指導(dǎo)教師姓名、職務(wù)張輝教授學(xué)科門類學(xué)科門類工學(xué)提交論文日期提交論文日期二○一三年一月學(xué)科、專業(yè)學(xué)科、專業(yè)通信與信息系統(tǒng)10081204171008120417西安電子科技大學(xué)學(xué)位論文獨(dú)創(chuàng)性（或創(chuàng)新性）聲明秉承學(xué)校嚴(yán)謹(jǐn)?shù)膶W(xué)風(fēng)和優(yōu)良的科學(xué)道德，本人聲明所呈交的論文是我個(gè)人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。盡我所知，除了文中特別加以標(biāo)注和致謝中所羅列的內(nèi)容以外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過(guò)的研究成果；也不包含為獲得西安電子科技大學(xué)或其它教育機(jī)構(gòu)的學(xué)位或證書而使用過(guò)的材料。與我一同工作的同志對(duì)本研究所做的任何貢獻(xiàn)均已在論文中做了明確的說(shuō)明并表示了謝意。申請(qǐng)學(xué)位論文與資料若有不實(shí)之處，本人承擔(dān)一切的法律責(zé)任。本人簽名日期西安電子科技大學(xué)關(guān)于論文使用授權(quán)的說(shuō)明本人完全了解西安電子科技大學(xué)有關(guān)保留和使用學(xué)位論文的規(guī)定，即研究生在校攻讀學(xué)位期間論文工作的知識(shí)產(chǎn)權(quán)單位屬西安電子科技大學(xué)。學(xué)校有權(quán)保留送交論文的復(fù)印件，允許查閱和借閱論文；學(xué)?？梢怨颊撐牡娜炕虿糠謨?nèi)容，可以允許采用影印、縮印或其它復(fù)制手段保存論文。同時(shí)本人保證，畢業(yè)后結(jié)合學(xué)位論文研究課題再撰寫的文章一律署名單位為西安電子科技大學(xué)。（保密的論文在解密后遵守此規(guī)定）本人簽名日期導(dǎo)師簽名日期