analysis of atmospheric effects due to atmospheric oxygen on a…

ID:33407335

大?。?71.74 KB

頁數(shù):93頁

時間:2019-02-25

analysis of atmospheric effects due to atmospheric oxygen on a…_第1頁
analysis of atmospheric effects due to atmospheric oxygen on a…_第2頁
analysis of atmospheric effects due to atmospheric oxygen on a…_第3頁
analysis of atmospheric effects due to atmospheric oxygen on a…_第4頁
analysis of atmospheric effects due to atmospheric oxygen on a…_第5頁
資源描述:

《analysis of atmospheric effects due to atmospheric oxygen on a…》由會員上傳分享,免費在線閱讀,更多相關內容在教育資源-天天文庫。

1、ANALYSISOFATMOSPHERICEFFECTSDUETOATMOSPHERICOXYGENONAWIDEBANDDIGITALSIGNALINTHE60GHZBANDByAdeliaC.ValdezThesissubmittedtotheFacultyoftheVirginiaPolytechnicInstituteandStateUniversity(VirginiaTech)inpartialfulfillmentoftherequirementsforthedegreeofMasterofScienc

2、eInElectricalEngineeringDr.TimothyPratt,ChairDr.CharlesBostianDr.DennisSweeneyJuly2001Blacksburg,VAKeywords:60GHz,WidebandSignals,atmosphericabsorption,oxygenresonanceCopyright2001,AdeliaC.ValdezANANALYSISOFATMOSPHERICEFFECTSDUETOATMOSPHERICOXYGENONAWIDEBANDDIG

3、ITALSIGNALINTHE60GHZBANDAdeliaC.ValdezAbstractAslowermicrowavefrequencybandsbecomesaturatedwithusers,thereisamotivationfortheresearchofapplicationsthatutilizehigherfrequencies,especiallythe60GHzband.Thisbandisplaguedwithhighatmosphericabsorptionduetoatmospheric

4、oxygen,buthasalotofbandwidth,whichmakesitdesirableformulti-mediaapplications.Recently,researchofwidebanddigitallinkswithinthe60GHzbandgainedtheinterestofthewirelesscommunicationindustrywhentheFCCannouncedthatalicenseisnotrequiredforawidebanddigitalsignalinthisb

5、and.Previousresearchon60GHzsignalsfocusedonhowmuchattenuationduetoatmosphericoxygenexistsinthelink.Butalookatthephysicalpropertiesofatmosphericoxygenrevealsboththereasonwhyatmosphericoxygenabsorbselectromagneticwavesandhowpressureaffectsatmosphericoxygen.Atmosp

6、hericoxygenresonatesat60GHzduetotransitionsbetweenitsthreecloselyspacedrotationalstates.Thesetransitions,combinedwiththemagneticdipolemomentofatmosphericoxygen,causeattenuationandphasedispersioninelectromagneticwaves.Atlowerpressures,theindividualresonancelines

7、ofatmosphericoxygenappearintheattenuationandthephasedispersionplots.Aspressureincreases,theresonancelinesbroadenandcontributetoneighboringresonantlines.Theeffectofattenuationandphasedispersioninawidebandsignalbecomesgreateratloweratmosphericpressures,whichresul

8、tsinsignaldistortion.Thesignaldistortionleadstomorebiterrorsandresultsinthepresenceofinter-symbolinterference(ISI)inthereceivedsignal.Thisthesisaimstoanalyzetheeffectsofatmo

當前文檔最多預覽五頁,下載文檔查看全文

此文檔下載收益歸作者所有

當前文檔最多預覽五頁,下載文檔查看全文
溫馨提示:
1. 部分包含數(shù)學公式或PPT動畫的文件,查看預覽時可能會顯示錯亂或異常,文件下載后無此問題,請放心下載。
2. 本文檔由用戶上傳,版權歸屬用戶,天天文庫負責整理代發(fā)布。如果您對本文檔版權有爭議請及時聯(lián)系客服。
3. 下載前請仔細閱讀文檔內容,確認文檔內容符合您的需求后進行下載,若出現(xiàn)內容與標題不符可向本站投訴處理。
4. 下載文檔時可能由于網絡波動等原因無法下載或下載錯誤,付費完成后未能成功下載的用戶請聯(lián)系客服處理。
关闭