低軌衛(wèi)星移動(dòng)通信的信道模型研究及硬件實(shí)現(xiàn).pdf

1、電子科技大學(xué)碩士學(xué)位論文低軌衛(wèi)星移動(dòng)通信的信道模型研究及硬件實(shí)現(xiàn)姓名：王劍申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：馮剛20040310AbstractComparingwiththefixed—linecommunicationnetworksandtheterrestrialwirelesscommunicationsystems，thesatellitemobilecommunicationsystemhasbeenahot

2、spotintheresearchfieldduetoitswidecoverageandconveniencetoprovidetheglobalserviceAmongkindsofsatellitecommunicationsystems，theLEOsatellitecommunicationsystemhasverywideprosperitybecauseitsorbitislowandithaslesscommunicat

3、iondelay，lesspathlossandflexiblenetworkorganizationInordertoprovidetheLEOsatellitecommunicationsystemwithgoodperformancetheimportantissuesneedtodoistostudythechannelpropagatingcharacteristicandbuildfeasiblechannelmodelsM

4、eanwhile，theimplementationofthechannelsimulatorissosignificantthatitcanprovideastrongdebugmethodforthesystemdesignandtestingCommunicationperformanceisaffectedbymanyfactorsduringitstransmissionintheLEOsatellitecommunicati

5、onchannelThispaperconsidersthenmlti—pathfadingandshadowing，Dopplerfrequencyoffset，noiseandfreespaceloss，andbuildsthechannelmodelsbasedontheseconsiderationswhichisthetheoreticalbasisofthedesignofLEOsatellitemobilechannels

6、imulatorsThecommonresearchonthetransmissionpropertyofsatellitemobilecommunicationchannelisanalyzedbysoftwaresimulationgenelallywhichlackshardwareexperimentalplatformBaseonthisrequirement，ourlabhadfinishedthedesignworkoft

7、hebasebandLEOsatellitecommunicationchannelsimulatorwhichhadgotthethirdprizefThethirdclassrewardofScience&Technologyol、NationalDefense)Onthisbasis，wecarriedouttheprojectnamed“LEOSatelliteMobileCommunicationChannelSimulato

8、r”Afterproposingthenewdesignscheme，thehardwareimplementationoftheLEOsatellitecommunicationchannelsimulatorhasbeenfinishedandbeensenttothesubscriberforworkingThisthesisisorganizedastbllows：Wegiveabriefintroductionofthreef