认知无线电网络论文：认知无线电网络频谱感知联盟博弈理论结盟距离可控因子

1、认知无线电网络论文：认知无线电网络频谱感知联盟博弈理论结盟距离可控因子【中文摘要】随着无线通信不断朝着宽带化、无缝化、智能化的方向发展,频谱资源匿乏问题日益严重。目前在特定行业固定分配专用频谱的方式，常常会出现频谱资源分配不均的情形，有限的可用频谱和低的频谱资源利用率决定了急需一种新的通信方式。认知无线电(CognitiveRadio,简称CR)技术作为一种智能频谱共享技术可有效缓解上述矛盾，它通过感知频域、时域和空域等频谱环境，自动搜寻并利用己授权频段的空闲频谱，实现不可再生频谱资源的再利用。本文首先分析现有频谱感知的各种不同方法的性能优劣和博弈论基本理论。其次,建立了博弈论用于认知无线电网

2、络中频谱感知的分析方法,提出了认知无线电网络频谱感知的动态博弈模型，通过仿真比较了当认知网络中存在不同数认知用户数时，认知用户愿意参与到协作频谱感知中的概率。再次结合联盟博弈的概念，讨论了基于联盟博弈频谱感知算法的效用函数和代价函数，考虑到算法的复杂性，采用了分布式的算法,通过简单的合并-分裂准则,来组成稳定的频谱感知联盟。结合联盟博弈的算法，提出协作频谱感知中相应的效用函数和代价函数。考虑到集中式算法的复杂度，采用了分布式协作频谱感知算法。最后通过结盟距离可控因子5这个参数,来表征距离在结盟策略选择中的作用并有效地控制联盟形成过程中的规模和距离。认知用户也可以通过网络环境的变化，寻找合适的结

3、盟策略，进行基于联盟博弈的协作频谱感知【英文摘要】Withtherapidevolutionofthewirelesscommunicationsinthebroadband,seamless,intelligentdirection,thedependenceonradiospectrumresourcehasbeengrowing.Atpresent,thewayofspecificindustrybusinessfixedallocationforspectrumoftenbringupunevendistributionofresources.Tosolvethisproblem,th

4、eonlywayistoreusethespectrumandimprovetheutilityofspectrumresource.Cognitiveradiotechnologyasasmartspectrumsharingtechnologieswillbeeffectiveinalleviatingthesecontradictions.Throughsensingfrequencydomain,timedomainandspacedomain,itcanautomaticallysearchandoccupyfreelicensedspectrum,reusethenon-renew

5、ableresourcesnthisdissertation,weanalyzesthevariousexistingwaysofspectrumsensingandthebasicconceptingametheory.Thenananalyzeprocessbasedongametheoryforcognitiveradionetworksisestablishedandadynamicgamemodelincognitiveradioforspectrumsensingisproposed.Wecomparetheoptimalproportionthatthesecondaryuser

6、sparticipateinspectrumsensingandtheaveragethroughputachievedinthecooperativesensinggamewithdifferentnumberofsecondaryusers.Combiningtheconceptofcoalitiongame,weproposeaspectrumsensingalgorithmbasedoncoalitiongame;thenconsideringthecomplexityoftheproposedalgorithm,weproposeadistributedalgorithmwhichu

7、singthesimplemergespiterulestoachievethestabilitystates.Finally,weproposedtheparameterSnamedcoalitiondistaneeregulationfactortocharacterizetheroleofdistaneeinthealliancestrategywhichcaneffectivecontroloftheprocessandthesizeofcoalitionformation.Afteranalyzingthestableofcoalitionspectrumsensingalgorit

8、hm,wesimulatedifferentalgorithmsandcomparethefalsealarmprobability,missingdetectionprobabilityvariationsinthecognitivenetworkswiththenumberofthesecondusersincreasing,andalsoshowthechangesoftheunionasthenetworktopologychanges.Secondaryusercanalsorecognizechangeinthenetwork,lookforasuitablealliancestrategyusingcoalitiongameincooperativespectrumsensing.【关键词】认知无线电网络频谱感知联盟博弈理论结盟距离可控因子【采买全文】139938.84813841372.1同时提供论文写作一对