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ID:33515370
大小:1.43 MB
页数:57页
时间:2019-02-26
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1、哈尔滨工程大学硕士学付论文ABSTRACTWimthematurationandwidelyuscofthedigitalcommunicationtechnique,theunderwateracousticvoicecommunicationtechnologyisunderdeveloping,However,thecommunicationtechniqueusedonthelandmaynotbeusedintheunderwateracousticeommunicationfieldcompletely.I
2、tWaSmainlyduetothelimitedcommunicationbandwidthandtime-varyandspace-varynatureoftheunderwateracousticcommunicationchannel.OFDMWaSwidelyusedinthelandwirelesseommunlcationfieldnow.Ithadsomeadvantages.Firstly,theUSiIlgrateofthefrequencyspectrumwaghigher.Secondly,th
3、ecapabilityofmulti-routte—interruptresistanceandthefrequencychoicedeclinewerestronger.Thirdly,thecapabilhyofdecline-poorthroughtheunitedcodingofsub·carrierwaveswasstrongertoo.FinallytheimplementationofDSPwageasierbecauseofthemodulationanddemodulationof0FDMthroug
4、htheusingofIFFTandFFT.IntheunderwateracousticcommunicationfieldtheseadvantageofOFDMwerethesameaswhichWaSUSedinthelandwirelesscommunicationfield.Thisthesisdevelopedahalf-duplexand10WpowerconsumingunderwateracousticdigitalvoicecommunicationsystembasedonOFDM.Thethe
5、oryandkeytechnologyofOFDMwereanalyzed.AlowpowereousumingoperationalamplifierandconverterofA/DandD/Awereusedinthedesignofthehardware.FurthermoreAMBE-2000wasusedtocompresstheoriginvoicecodingandTMS320VC5416DSPWasusedtomodulateanddemodulatethedigitalvoicesignal.OFD
6、MWaSusedinthedevelopedofsoftware.FFTandIFFTwereusedtoimplementthemodulationanddemodulationofthedata.AttheSalTletime,theworkingflowoftheSoftwareandtheframestructureinthecommunicationwareanalyzedinthisthesis.Atlast,thefeasibilityoftheunderwateracousticdigitalvoice
7、communicationsystembasedof0FDMisprovedthroughthetestinthetank.Keywords:UnderwaterAcousticCommunication;OFDM;DSP哈尔滨工程大学学位论文原创性声明本人郑重声明:本论文的所有工作,是在导师的指导下,由作者本人独立完成的。有关观点、方法、数据和文献等的引用已在文中指出,并与参考文献相对应。除文中已经注明引用的内容外,本论文不包含任何其他个人或集体已经公开发表的作品成果。对本文的研究做出重要贡献的个人和集体,均已在文中
8、以明确方式标明。本人完全意识到本声明的法律结果由本人承担。作者(签字):这盈日期:20U7年歹月6日哈尔滨工程大学硕士学位论文1.1论文背景和意义第1章绪论现代大国的崛起,都是从海洋开始的,谁拥有了制海权,谁就拥有了世界。海洋联系了世界,在经济全球化的趋势下,海洋是世界范围内的商品交换最廉价的通道。同时在陆地可利用资源越来越少,人
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