時(shí)空調(diào)制擴(kuò)頻系統(tǒng)抗多徑定位技術(shù)研究.pdf

1、南京航空航天大學(xué)碩士學(xué)位論文時(shí)空調(diào)制擴(kuò)頻系統(tǒng)抗多徑定位技術(shù)研究姓名：史庭祥申請(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：宋茂忠2003.3.1時(shí)空調(diào)制擴(kuò)頻系統(tǒng)抗多徑定位技術(shù)研究AbstractTomeetthechallengeoffuturecommunicationandintegratedcommunicationandradiolocationsystem，itiSanalyzedthathowtoreceivespace—‘

2、timesignalandobtainlocationinformationundermulti‘—pathenvironmentinaspread—spectrumspace—timemodulationsystem，whichiSanintegratedcommunicationandradiolocationsystemwithcirculararrayantennaTwotechniquesofpseudo—randomcode

3、trackingrelyingondelaylockloop(DLL)andseparationofsub—chipmultipathcomponentsarestudiedasfol10WSAccordingtothefirsttechnique，theexpressionofopen—loopmeasurementcompensationandanewmultiloopiterationalgorithmarededucedbase

4、donpreviousresearch，andthefollowingresearchonthesecondtechniqueconsistsofseveralpartsFirst，asimplemethodiSproposedSUitableforseparationofsub—chipmulti—pathcomponentandtheinfluenceoftrackingerrorsontheseparationofsub—。chi

5、pmulti?！痯athcomponentsunderspread—spectrumcommunicationmodelisdiscussedindetail，thensomecertainresearchesonjoint—‘estimationofpseudo—。randomcodetrackingandsub—chipmulti—pathcomponentsarecarriedout，whichcombineasimplenewa

6、lgorithmforextractingmulti—pathcomponentsandasortofestimationofmulti—pathchannelpulseresponseinpresenceofmulti—pathinterferenceFinally，thiskindofjoint—estimationiSappliedtothesystem，andtheresultsoftheSimulationdemonstrat