衛(wèi)星通信中信號設計與檢測.pdf

1、博士后研究報告衛(wèi)星通信中信號設計與檢測ResearchonSignalDesignandDetectioninSatelliteCommunications流動站(一級學科)名稱值皇生通值王猩專業(yè)(二級學科)名稱——研究工作起始時間至QQ皇生曼旦研究工作期滿時間至Q】!生曼月上海交通大學2012年11月博士后研究報告ResearchonSignalDesnandDetectioninSatelliteCommunicationsAbst

2、ract：Therearemainlytwotechniquesprovidingsatellitemobilecommunications，oneistheuseofloworbitsatellites，theotheristheuseofgeostationarysatellitesandlargedeployablemultibeamantennaInthedissertation，thesignaldesignanddetect

3、iontechnologyarethroughlyinvestigatedAtpresem，designingaspecialtypeLEOmicrosatellitecommunicationsystemforshortburstdatatransferringisinvestigatedTheorthogonalcodedivisionmultiplexingDSCDMAwaschosenasthelinkbetweenthesat

4、elliteandgroundstationmultipleaccesssystembecauseoftheadvantagesofahighimmunitytointerferenceandhidingtheusefulinformationandmultipleaccesscommunicationabilityAccordingtohighdynamiccharacteristicsofLEOsatellitecommunicat

5、ionchannel，thepaperusesSCCCcodedBPSKmodulationsignalandnoncoherentdemodulationiterativedecodingschemeThespreadspectrumsignalcapturealgorithm，whichisthemostimportantprobleminthetaskofreducingcommunicationlinksetuptime，iss

6、tudiedoverthelargeDopplershiftenvironmentThetwoburstsignalreceptionmethodsbasedondifferentialoperatorsandFFTareprovidedThetwomethodsCanqmcl(1ypeformburstsignaldetection，PNcodeacquisition，frequencyoffsetestimation，framesy

7、nchronizationandbittimerecevorytasksThirditerativedecodingofconvolutionalcodedGMSKsignalisstudiedoverGEOsatellitemobilechannelTheanalysisshowsthatthequasicoherentdetectionalgorithmissuitableforGMSKsignalinlowsignaltonois

8、eratioconditionorsatellitemobilechannelBasedonthistheoryanewcodedmodulationschemeandseriallyiterativedecodingschemeisproposedThenewschemehasmanyadvantages，suchasdonotneedphaserecoveryandrequiresimpletimingsynchronization

9、，whileexcellentBERperformaceCanbeattainedusingiterativechannelestimationalgorithmInordertoimproveantijammingcapabilitythecoherentslowfrequencyhoppingisselectedasintersatellitelinktransmissionschemeAccordingtothetechnical