硕士学位论文-宽带无线通信技术在矿井巷道中的应用研究

《硕士学位论文-宽带无线通信技术在矿井巷道中的应用研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西安科技大学硕士学位论文宽带无线通信技术在矿井巷道中的应用研究姓名：孙永恒申请学位级别：硕士专业：通信与信息系统指导教师：孙龙杰@䆎᭛乬Ⳃ˖ᆑᏺ᮴㒓䗮ᡔᴃ೼ⷓѩᏋ䘧Ёⱘᑨ⫼ⷨおϧϮ˖䗮Ϣᙃ㋏㒳⸩຿⫳˖ᄭ∌ᘦ˄ㅒৡ˅ᣛᇐᬭᏜ˖ᄭ啭ᵄ˄ㅒৡ˅ᨬ㽕ⷓѩ᮴㒓䘧ሲѢ䰤ᅮぎ䯈䘧ˈ݋᳝ϡৠѢഄ䴶㞾⬅ぎ䯈䘧ⱘӴ䕧⡍ᗻDŽߚ䲚ᡔᴃᰃ㾷އ㞾⬅ぎ䯈䘧໮ᕘ㹄㨑᳔Ў᳝ᬜᡔᴃПϔDŽབԩᡞᅗᑨ⫼Ѣⷓѩ䘧㾷އ䖭ϔ䯂乬ˈᰃᴀ᭛ⱘⷨおЏ乬DŽᴀ᭛ߚᵤњ݌ൟⷓѩ䘧῵ൟⱘ໮ᕘӴ䕧㹄㨑⡍ᗻDŽ݊Џ㽕⡍⚍ᰃˈ೼䗮ᐌᚙމϟⷓѩ䘧㸼⦄Ўᯊবᖿ㹄㨑ᔶᓣˈᑊϨ䖬ᄬ೼ᔎ⬉⺕ᑆᡄDŽḍ᥂ⷓѩ䘧䖭ϔ⡍

2、ᕕˈᴀ᭛ᡞ㞾䗖ᑨ⊶ᴳᔶ៤ᡔᴃϢOFDMᡔᴃ㒧ড়ᑨ⫼ࠄⷓѩ᮴㒓䗮Ёˈᔶ៤ⷓѩ㞾䗖ᑨOFDM㋏㒳DŽ೼ߚᵤ↨䕗⦄᳝ᡔᴃ㋏㒳ⱘ৘⾡ᅲ⦄ᮍ⊩ৢˈ䞛⫼POST-FFTᮍ⊩᳈㛑䗖ᑨⷓѩ䘧⦃๗DŽ಴Ў೼᥹ᬊোFFTৢߚ߿ࡴᴗˈ㛑᳈དഄ䖬ॳথᇘোDŽ೼䖭݊Ёᴗؐ৥䞣⫳៤ㅫ⊩ᰃ㋏㒳ᅲ⦄ᮍ⊩ⱘ݇䬂ˈ෎Ѣᯊඳ䆁㒗ᑣ߫ⱘ䘧Ԅ䅵ㅫ⊩ˈٙ䞠৊বᤶ⃵᭄ᇥˈ䖤ㅫ䞣ᇥˈ䗖ᅰ԰Ўⷓѩ㞾䗖ᑨOFDM㋏㒳ᴗ৥䞣⫳៤ㅫ⊩DŽⷓѩ䰤ᅮぎ䯈䘧䗮ᐌ㸼⦄Ўぎ䯈Ⳍ݇ᗻ,㗠෎Ѣ໮໽㒓ⱘぎᯊ㓪ⷕᡔᴃ㦋পߚ䲚๲Ⲟⱘ㽕∖ᰃˈぎ䯈䘧⣀ゟϡⳌ݇DŽᴀ᭛᥶䅼߽⫼⡍ᕕ⊶ᴳᔶ៤ᡔᴃᇍぎᯊ㓪ⷕো⊶ᴳ䌟ᔶˈेᔶ៤ⷓѩぎ

3、ᯊ⡍ᕕ⊶ᴳ㓪ⷕᡔᴃ㒧ᵘˈᴹՓⷓѩぎ䯈䘧এⳌ݇ᗻˈৠᯊ䖬ৃҹ䰡Ԣ䘧Ԅ䅵ⱘ䖤ㅫ໡ᴖᑺDŽ᳔ৢˈ䙉ᕾ㋏㒳᳔Ӭ࣪ᗱ䏃˖ᇚϞ䗄ϸ⾡ᡔᴃ㵡ড়ৢˈᔶ៤ⷓѩOFDM-STEBC㋏㒳ˈᑊᇍ㋏㒳䖯㸠ᘏԧ䆒䅵DŽӓⳳ㒧ᵰ㸼ᯢˈᮄⱘᡔᴃ㋏㒳㛑᳝ᬜᡥࠊⷓѩᏋ䘧ⱘ໮ᕘӴ䕧㹄㨑ˈ㋏㒳೼乥ඳǃᯊඳǃぎඳˈߚ߿㦋ᕫߚ䲚๲ⲞˈՓⷓѩ䗮㋏㒳ᗻ㛑ᕫࠄᕜ໻ⱘᦤछDŽ݇䬂䆡˖໮ᕘ㹄㨑˗ߚ䲚๲Ⲟ˗OFDM˗㞾䗖ᑨ˗⡍ᕕ⊶ᴳᔶ៤˗STBCⷨお㉏ൟ˖⧚䆎ⷨおSubject:WidebandWirelessCommunicationsTechniquesApplicationResearchi

4、ntheCoalMineTunnelSpecialty:CommunicationandInformationSystemName:SunYongheng(signature)Instructor:SunLongjie(signature)ABSTRACTMinetunnelisdifferentfromthetransmissioncharacteristicsofterrestrialfree-spacechannel,whichislimitedtospaceradiochannel.Diversitytechniqueisone

5、ofthemosteffectivemethodstosolvethefree-spacemultipathfading.Howtosolvethisproblemoftheminechannelbyapplyingitisthethemeofthispaper.Thispaperhasanalyzedthefadingcharacteristicsofmultipathtransmissioninthetypicalmodelofminechannel.Typicallyspeaking,fastfadingform,strongel

6、ectromagneticinterferenceisboththemainfeature.Accordingtothechannelcharacteristicsofmine,thispaperhascombinedtheadaptivebeamformingtechniqueswiththeOFDMsystemwhichisappliedtominewirelesscommunication,andthenamineAdaptiveOFDMsystemhasformed.Afteranalyzingandcomparingtheme

7、thodsofrealizationofexistingsystems,thePOST-FFTmethodmaybemoreadaptabletotheminechannelenvironments.BecausethereceivingsignalcanrestorethetransmittedsignaltobetterafterbeingweightedwithFFT.HereinWeightvectorinthisgenerationisthekeyforrealization.Aschannelestimationalgori

8、thmbasedontime-domaintrainingsequencehasthecharacteristicsoffewerFouriertransformandlesscomputation,the