协作认知无线电网络中基于能效和谱效的资源分配技术研究

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1、AbstractOFDM-basedcognitiveradionetworkswithimperfectspectrumsensing.Theoptimalresourceallocationstrategy,includingsensingtimeandtransmitpower,isdesignedtomaximizetheergodicthroughputofthesecondarysystem.Foratwo-hopcooperativecommunicationinthesecondarysystem,theamplify-and-forw

2、ardrelayprotocolisadoptedandenablesthesourceandrelaytosensethestateoftheprimaryuser(PU)jointly.ToprotectthePUeffectivelyfromharmfulinterference,theaverageinterferencepowerconstraintineachhopisconsidered.TwosimplifiedversionsfortheSSSAandSSOAschemesareemployedbecauseofthecomplexi

3、tyoftheproblem.Thentwoalgorithmsareproposedthatacquiretheoptimalsensingtimeandpowerallocationforbothschemes.Finally,simulationresultsarepresentedtocomparetheperformanceofthetwoschemes.KeyWords:CognitiveRadio;Cooperativecommunication;Spectrumsensing;Spectralefficiency;Energyeffic

4、iencyIII万方数据目录目录摘要..........................................................................................................IAbstract..................................................................................................II1绪论...........................................

5、........................................................11.1课题研究的背景和意义............................................................................11.2课题研究的主要内容...............................................................................21.3课题的结构及主要内容...........................

6、.................................................32认知无线电网络与协作通信............................................................52.1认知无线电网络.......................................................................................52.1.1认知无线电网络模型...........................................

7、..............................................52.1.1认知无线电频谱感知技术.................................................................................72.1.2认知无线电频谱接入技术...............................................................................102.2协作通信网络............................

8、...............................................