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认知次用户系统中分布式天线的位置优化 被引量：1

Optimization of distributed antenna locations for cognitive secondary systems
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摘要 次用户(SU)系统是认知无线电中的核心概念,SU在满足主用户(PU)干扰约束的前提下接入授权频谱,能够显著提高无线频谱的整体使用效率。基于分布式天线的SU系统(DABSS)以其巨大的容量优势,正成为当前的研究热点。DABSS中分布式天线的位置能极大地影响SU系统的容量。为了提高SU系统的容量,该文提出了距离平方功率比(squared distance divided power,SDDP)准则来进行天线位置的设计。特别考虑一种采用圆阵天线配置的DABSS,给出了天线位置的解析表达式。仿真结果表明:该方案与最优的天线放置方案性能接近,能够在满足PU干扰约束的前提下大幅提升SU系统的容量。 The secondary system is a key issue in cognitive radio.In the secondary system,the secondary users are allowed to access licensed frequency bands as long as they protect the primary users from harmful interference,which significantly improves the whole system＇s spectrum efficiency. The distributed-antenna based secondary system（DABSS）has attracted much attention recently due to its potential for increasing system capacity.The DABSS antenna location strongly influences the secondary system capacity.The secondary system capacity can be increased by using the squared distance divided power（SDDP）criterion to optimize the antenna locations.A circular DABSS is designed with an analytical solution for the antenna locations using the SDDP criterion.Simulations show that the system efficiency is close to the optimal efficiency and that this scheme can dramatically increase the secondary system capacity without exceeding the interference limitation for the primary users.
作者 赵俊韬 冯伟 肖立民 王京
机构地区 清华大学电子工程系
出处 《清华大学学报（自然科学版）》 EI CAS CSCD 北大核心 2014年第12期1594-1597,1603,共5页 Journal of Tsinghua University(Science and Technology)
基金 国家"八六三"高技术项目(2014AA01A703) 国家自然科学基金资助项目(61201186) 国家自然科学基金创新研究群体项目(61021001) 国家重点基础研究发展规划项目(2012CB316000) 国家科技重大专项课题(2013ZX03001008-004) 教育部科学研究重大项目(313005) 东南大学移动通信国家重点实验室开放研究项目(2012D02)
关键词 移动通信 认知无线电 基于分布式天线的次用户系统 天线位置设计 距离平方功率比准则 mobile communication cognitive radio distributed antenna based secondary systems antenna location design squared distance divided power criterion
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献13

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同被引文献12

  • 1Haykin S.Cognitive radio:Brain-empowered wireless communications[J].IEEE Journal on Selected Areas in Communications,2005,23(2):201-220.
  • 2FENG Wei,WANG Yanmin,GE Ning,et al.Virtual MIMO in multi-cell distributed antenna systems:coordinated transmissions with large-scale CSIT[J].IEEE Journal on Selected Areas in Communications,2013,31(10):2067-2081.
  • 3WANG Yanmin,FENG Wei,XIAO Limin,et al.Coordinated multi-cell transmission for distributed antenna systems with partial CSIT[J].IEEE Commun Lett,2012,16(7):1044-1047.
  • 4FENG Wei,CHEN Yunfei,GE Ning,et al.Optimal energy-efficient power allocation for distributed antenna systems with imperfect CSI[J].IEEE Trans Veh Technol,2015:1-5.
  • 5FENG Wei,LI Yunzhou,GAN Jiansong,et al.On the deployment of antenna elements in generalized multi-user distributed antenna systems[J].Mobile Netw Appl,2011,16(1):35-45.
  • 6ZHAO Juntao,FENG Wei,ZHOU Chunhui,et al.Antenna Location Design for Distributed-Antenna Based Secondary Systems[C]//Proceedings of IEEE International Conference on Wireless Communications,Networking and Mobile Computing.Shanghai,China:IEEE Press,2012:1-4.
  • 7ZHANG Heli,JI Hong,LI Xi.RAU allocation for secondary users in cognitive WLAN over Fiber system:a HMM approach[C]//Proceedings of IEEE Wireless Communications and Networking Conference.Shanghai,China:IEEE Press,2012:1416-1421.
  • 8SHAN Baokun,LI Xi,JI Hong,et al.Adaptive energy-efficient resource allocation for cognitive wireless local area network over fiber[C]//Proceedings of IET National Doctoral Academic Forum on Information and Communications Technology.Beijing,China:IET,2013:1-5.
  • 9FENG Wei,GE Ning,LU Jianhua.Hierarchical transmission optimization for massively dense distributed antenna systems[J].IEEE Communications Letters,2015,19(4):673-676.
  • 10FENG Wei,LI Yunzhou,ZHOU Shidong,et al.Downlink capacity of distributed antenna systems in a multi-cell environment[C]//Proceedings of Wireless Communications and Networking Conference.Budapest,Hungary:IEEE Press,2009:1-5.

引证文献1

清华大学学报（自然科学版）
2014年 第12期

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