基于认知无线电的MBUWB系统研究与实现

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1、上海交通大学硕士学位论文基于认知无线电的MB-UWB系统研究与实现姓名：吴骏申请学位级别：硕士专业：电路与系统指导教师：毛志刚20081101上海交通大学工程硕士学位论文ABSTRACTOnCognitiveRadioMultibandUWB:SpectrumAbstractInwirelesscommunications,spectrumisavaluablenaturalresource.Thetraditionalwayofspectrumallocationisafixedapproachbygovernmentagenciesororganiz

2、ationsauthorizedtouse.Asrapiddevelopmentinthecommunicationsindustry,theshortageofwirelessspectrumresource-poorisbecomingincreasinglyserious.MultibandUltra-Widebandsystemsareabletoachievehighdataratesand,inevitably,collidingwithmanyexistingwirelessservicesbecausetheydealwithanexce

3、ssivewiderangeofspectrum.MultibandUWBusesorthogonalfrequencydivisionmodulation(OFDM)toallocateorshapeitstransmittingspectrumascognitiveradiosdo.Inthispaper,thesolutionsforavoidinginterferencesinUWBsystemsareproposed.Andaconvenientwayofdetectinginterferingsignalsisalsointroduced.T

4、henweintroducedanewapproachofAICSub-carrierChannelswithimprovedaccuracyofalgorithm.Finally,wedesignedhardwarecircuitsforMultibandUWBsystems.Afterverification,oursolutionsfordynamicallyshapingofcomputingtransferringspectrumcanbequicklyandcorrectlycompletedwithhigherIV上海交通大学工程硕士学位论

5、文ABSTRACTaccuracy.Keywords:UWB;OFDM;CognitiveRadio;ShapingofSpectrum;V上海交通大学工程硕士学位论文目录图索引图表1认知无线电模型........................................................................5图表2UWB系统频带划分.................................................................12图表3MultibandUWB系统发射端结构图......

6、..........................................16图表4MultibandUWB基带符号频谱.....................................................16图表5Band1-Band6，MultibandUWB系统时频交织图.................................17图表6关闭了第四子频带的MultibandUWB系统时频交织图..........................23图表7关闭第57-62子载波通道的OFDM符号频谱。......

7、............................24图表8关闭45-70个子载波通道的OFDM符号频谱.....................................25图表9关闭56-63号子载波通道的OFDM符号频谱。..................................29图表10采用AIC子载波通道算法OFDM符号频谱......................................30图表116个零子载波通道+4个AIC子载波通道获得的OFDM符号频谱.............31图表126个零子载波通

8、道+6个AIC子载波通道获得的OFDM符号频谱.............31图表