研究协作通信的中继选择算法

摘要摘要近年来，新兴的多输入多输出(MultipleInputMultipleOutput,MIMO)技术为改善通信系统性能、提高小区边缘用户的吞吐量和传输可靠性提供了一条有效的解决途径。协作通信技术则充分利用了无线电波的全向传播特性，使无线网络中的节点相互协作形成了虚拟的天线阵列来获得传统MIMO技术可以得到的空间分集增益。作为一种新型的MIMO通信模式，中继节点选择技术是其关键技术之一，决定了协作是否能够带来性能增益。文章简要概述了协作通信的相关技术，依据不同分类对中继节点选择算法进行分类介绍，并且对近年来典型的中继节点选择算法进行分析和比较。得出结论：只有根据系统需求合理地选择、配置中继节点才能更好地优化协同通信的性能。关键词：MIMO协作通信协作分集中继选择AbstractAbstractInrecentyears,theemergingMIMO(MultipleInputMultipleOutput)technologyprovidesaneffectivesolutiontoimprovecommunicationsystemperformance,improvethethroughputandtransmissionreliabilityoftheusersontheedgeofthecell.Cooperativecommunicationtechnologytakesfulladvantageofradiowave’spropagationcharacteristicstomakenodesinthewirelessnetworkformavirtualantennaarraytogetthespatialdiversitygainastraditionalMIMOtechnologycanhave.AsanewMIMOcommunicationmode,relaynodeselectiontechniqueisoneofitskeytechnologiesanddecideswhethercollaborationcanbringaperformancegain.Thispapergivesabriefoverviewofcooperativecommunicationtechnology,elaboratesdifferentrelaynodeselectionalgorithmsaccordingtodifferentcategoriesofclassification,analyzesandcomparesseveraltypicalrelaynodeselectionalgorithms.Inthelast,wegetaconclusionthattheonlychoosereasonablerelaynodesbasedonsystemneeds,canwebetteroptimizetheperformanceofcooperativecommunication.Keywords:MIMOCooperativeCommunicationsCooperativeDiversityRelaySelection目录目录第一章绪论......................................................11.1通信技术的发展........................................................................................11.24G技术介绍...............................................................................................11.2.14G技术简介....................................................................................11.2.24G中的通信技术............................................................................21.3协作通信的背景........................................................................................41.4论文的主要工作........................................................................................5第二章协作通信与中继选择概述....................................72.1协作通信的概念及其研究意义.................................................................72.2协作分集技术.............................................................................................82.2.1协作分集的优点.............................................................................92.2.2协作分集的应用范围.....................................................................92.3中继信道模型..........................................................................................102.4中继节点的转发策略..............................................................................122.4.1固定中继转发策略.......................................................................122.4.2自适应中继转发策略...................................................................142.5本章小结...................................................................................................15第三章中继选择技术研究.........................................173.1协作通信的优点......................................................................................173.2中继网络的系统模型...............................................................................173.3中继选择算法的分类...............................................................................183.4典型中继选择算法介绍...........................................................................193.4.1机会中继选择算法及其改进.......................................................193.4.2贪婪算法及其应用：...................................................................233.4.3基于延时的伙伴选择算法...........................................................243.4.4考虑用户公平性的中继选择.......................................................263.5本章小结..................................................................................................27目录第四章仿真结果及分析...........................................294.1中继转发策略AF、DF仿真.................................................................294.1.1仿真参数设定...............................................................................294.1.2仿真结果分析...............................................................................294.2机会中继选择算法仿真..........................................................................314.2.1仿真参数设定...............................................................................314.2.2仿真结果分析...............................................................................314.3本章小结..................................................................................................32第五章总结与展望...............................................335.1总结..........................................................................................................335.2展望...........................................................................................................34致谢............................................................35参考文献........................................................37第一章绪论1第一章绪论1.1通信技术的发展人类几千年的发展历史中无线通信技术发挥了极其重要的作用。我国古代烽火戏诸侯所用的烽火台就是最早的传递信息的平台，1897年，马可尼（GuglielmoMarconi）第一次向全世界展示了无线通信的威力，他实现了在布里斯托尔海峡中船只相互的持续通信。自此，移动物体之间的通信也因为成了人们关注的焦点