基于ofdm地水声数字语音通讯系统设计

《基于ofdm地水声数字语音通讯系统设计》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

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