通信工程毕业设计(论文)外文翻译-一个新的协作频谱感知算法认知无线电网络

《通信工程毕业设计(论文)外文翻译-一个新的协作频谱感知算法认知无线电网络》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、毕业设计（论文）外文参考资料及译文译文题目：一个新的协作频谱感知算法认知无线电网络　　　　　学生姓名：学　　号：专　　业：通信工程所在学院：龙蟠学院指导教师：田甜职　　称：讲师2011年12月1日说明：要求学生结合毕业设计（论文）课题参阅一篇以上的外文资料，并翻译至少一万印刷符（或译出3千汉字）以上的译文。译文原则上要求打印（如手写，一律用400字方格稿纸书写），连同学校提供的统一封面及英文原文装订，于毕业设计（论文）工作开始后2周内完成，作为成绩考核的一部分。ANewCooperativeSpectrumSensingAlgorithmforCog

2、nitiveRadioNetworksAbstract—spectrumsensingisacriticalphaseinbuildingacognitiveradionetwork.However,thebandwidthforreportingsecondaryusers’sensingresultswillbeinsufficient,whenthenumberofsecondaryuserisverylarge.Inthispaper,weproposeanewcooperativespectrumsensingalgorithmtoalle

3、viatethebandwidthproblemofreportingchannel.Comparedwithconventionalmethod,onlythesecondaryuserswithreliableinformationareallowedtoreporttheirsensingresults.Whennouserwithreliableinformation,onlythesecondaryuserwithhighestreputationwillreportitssensingresult.Simulationresultssho

4、wthatouralgorithmachievesbettersensingperformanceandtheaveragenumberofsensingbitsdecreasegreatly.Keywords—cognitiveradio;cooperativespectrumsensing;doublethreshold;reputationⅠ.INTRODUCTIONDuetotheincreasinglydevelopmentofwirelessapplications,moreandmorespectrumresourcesareneede

5、dtosupportnumerousemergingwirelessservice.However,recentmeasurementsbyFederalCommunicationCommission(FCC)haveshownthat70%oftheallocatedspectruminUSisnotutilized[1].Inordertoincreasetheefficiencyofspectrumutilization,cognitiveradiotechnologywasrecentlyproposed[2],[3].Arequiremen

6、tofcognitiveradiosisthattheirtransmissionshouldnotcauseharmfulinterferencetoprimaryusers.Namely,thesecondaryuserscanusethelicensedspectrumaslongastheprimaryuserisabsent.However,whentheprimaryusercomesbackintooperation,thesecondaryusersshouldvacatethespectruminstantlytoavoidinte

7、rferencewiththeprimaryuser.Accordingly,spectrumsensingisacrucialphaseinbuildingacognitiveradiosystem.Oneofthegreatchallengesofimplementingspectrumsensingisthehiddenterminalproblemwhichcausedbythefadingofthechannelsandtheshadowingeffects.Inordertodealwiththehiddenterminalproblem

8、,cooperativespectrumsensinghasbeenstudiedtoimprovethes