基于OFDM技术的无线视频传输系统网管模块的设计与实现.txt

: :ofdm :086700 : : : : 2011l10: : : : 086700 : 2011l10() :)l;z 涨: ; 桢(涨) :顣 :顣 : : : : 0ofdm .3 ofdm ofdm ofdm 塣 snmp 飬 javasnmp ofdm 鷢顣 snmp snmpsnmp snmp ofdm豸ofdm ofdm豸 ofdm豸 msthawksnmpsnmp飬; jfreechart档 :ofdm :ofdmsnmpjava virelessvideotransmissionsystemdesign andimplementationbasedonofdm technology abstract orthogonalfrequencydivisionmultiplexingofdm15oneofthe eoreteehnologiesaboutthefoturewirelessbroadbandaeeessandnext generationmobileeommunieations.comparingwithothermeansof transmission ofdmhasunmatehedadvantagestobeappliedinwireless videotransmission.currentlywirelessvideotransmissionsystemsbased ontheofdmteehnologyhaveemergedinthemarket.50theresearehof ofdmvideotransmissionnetworkmanagementsystem15ofgreat praetiealsignifieanee 5implenetworkmanagementprotocolsnmp15anetwork managementprotoeolwhieh15widelyusedandimplementedeasily.it15 supportedandwidelyusedbymanymanufacturers.ithasbeeomean actualindustrystandardinthefieldofnetworkmanagement. aeeordingtotheneedofaetualprojeet thisdissertationdesignsa eross platformnetworkmanagementsystembasedonsnmp protoeol andwhieh15developedbyusingjavalanguage.thesystem eanrealizetheeonfigurationmanagement performaneemanagement faultmanagementandsecuritymanagementoftheofdmwirelessvideo transmissionspeeialnetwork. thedissertationfirstlyoutlinesthebaekgroundoftheprojeet ineludingthedevelopmentofwirelessbroadbandeommunieationsand networkmanagementprotoeol.theeommunieationteehnologyandthe networkmanagementprotoeolwhiehtheprojectehoosesarealso diseussed. 111 andthen thedissertationfoeusesonthebasic owledgeof networkmanagementsystem suehastheeoneeptofnetwork management theeomponentsofnetworkmanagementsystemthe funetionmodelandarehiteetureofnetworkmanagement andalsothe dissertationfocusesonsnmp includingthedevelopmentproeessof snmp thearchiteetureofsnmp managementinformationbase struetureofmanagementinformationandeommunieationmeehanismof snmp. unlikethegeneraleomputernetworkmanagementsystemthis netw0rkmanagementsystem15highlytargeted.50it15particularly importanttohaveathoroughunderstandingofofdmdevicesterminal. thedissertationhasanin depthdiseussionaboutthebasietheoryof ofdmandimplementsprineipleofofdmwirelessdevieesterminal. speeifienetworkmanagementneedseanbeputforwardbasedonthe analyzingthemanagementinformationbaseaboutofdmdeviees tellninal. theeorepartofthedissertation15thedesignandimplementationof networkmanagementsystem.firstly thewholedesignideaofnetwork managementsystem15proposed.then overallnetworkmanagement softwarearehiteeture15designed.byusingthefreeopen soureesnmp packageprovidedbyw sthawkconeretelyrealizesnmpprotocolforthe dataacquisitioneommunieations.byusingpolling strategytorealize dynamiedisplayingtimely.byusingjfreecharttofinishgraphieal interfaeeaboutthespeetrumperformaneeandnoteheonfiguration. finally sumuptheabovediseussion:therealizationofthebasie funetionofnetworkmanagementfunetionprovideseffeetiveproteetion forthereliableandstableoperationoftheofdmwirelessvideo transmissionnetwork.atthesametime thenetworkmanagementsystem hasstrongscalabilityandcross platformnature.withthefollowing optimizationandimprovement thesystemwillbemorematureand stable. keywords:ofdmsnmpnetworkmanagementjava iv .1 1.1.1 1.3.4 1.4.5 ofdm.6 2.1ofdm.6 2.1.1ofdm.6 2.1.2ofdmfft.8 2.13.10 2.2ofdm豸.12 2 2.1ofdm豸.12 2 2.2ofdm豸.15 豸snmp顭.27 3.1.27 7 7 8 3.14.30 3.2snmp.32 3.2.1snmp.32 3.2.2snmp.34 3.2.3snmp.35 3.2.4snmp.41 .47 4.1.47 4.1.1ofdm豸47 4.1.2ofdm豸48 8 9 4.2.494.355 4.4.58 4.4.158 1 .66 5.166 5.2.66 68 .70 .71!: 1.1 磬硢 硣 緶 911 : 籩 縲 ;: .; .; .; .; . ofdm(orthogonalfrequeneydivisionmultiplexing) ieee802.1190 汾 ieee802.lla 5ghz54mbps 32mbps;xeee8oz.llb2.4ohz 1imbps 1imbps5.smbpszmbpsimbpslbj; ieee8oz.llgl2.4ghz54mbpsieee8oz.ll_1 802.11 () wlan ofdmofdm40 ofdm 70任 ofdm80 ofdm90 ofdmofdm : (adsl)(dab)(dvb) (hotv)(wlan)121 ofdm ofdm ofdm ofdm 2弰 弼似 棬佫 ; : 1. 2. 豸 3. 豸 4. 5. 6. 豸豸 7 豸 8. 豸 ofdm ofdm ofdm ofdm 塣 3 輰豸 磬豸 緢 磬豸 2016at; 豸飬 1990l7 ibmhpsljn snmp snmp18 4 ofdm 湤:棬snmp ofdm豸(ofdm豸)乤 ;ofdm java ofdmofdm豸 snmp ofdm豸 ofdm _ofdm ofdm ofdm 豸豸 ofdm豸 2.1ofdm ofdm任 ofdm (151) (icx)3 ofdmfft l317 2.1.1ofdm ofdm (psk)(qam)n tofdm(i=o1nl) .orecl()l:t/2 f=t;ofdm: (:)2:)() s()=ot+(2l) ofdm(22)ofdmj ltt+tl.确.s()dreci0 s()=o :exp:2 lf+l(22) 鲿ofdm c0ssin ofdm3lofdmi/t ej o 2 1ofdm131 22ofdm4 鹫 / 2zofdm4131_1ofd5f 22ofdm 1 j: exp(wn)exp(wn)dt-(23)nnmmnui1t 磬(22)jt : di lleewe/ t irp2()p (24)/.d(硢_ij.1i/.zlpxej. jlljd (j)/t ofdmt t 33ofdm (ici) 2 3ofdm131 2l.zofdmfft n(22)ofdm_ofdll 任(idft) (22)t=o s(t)tlkt/n(k=01nl): (kt/xp:(oknl)(25) s*idft s*任dft: s*exp2!jjv(oknl)(26) ofdmidftdft nidft任 idfts ofdm任 (fft/ifft)nidftnz( )ifftzifft 临(n/2)logzn16任idft ifft25632n idftn ifft仯 ofdmnnjfft nofdm仯 :/jd) (aliasing) ofdm pn(p) ifft/fftifft n(pl)nfftn (pl)np=4 n=01n1ifft任 k=o1nl:l_o