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基于中继选择的认知系统性能 被引量：6

Performance of Cognitive System Based on Relay Selection
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摘要 为了提高认知系统的性能,提出一种混合中继选择协议(HPRS).通过判断中继是否能正确解码源信号来决定中继采用何种协议转发数据,最终选取其中信噪比最大的中继作为最优中继,并推导了HPRS在高信噪比下中断概率的近似表达式及分集度.理论和仿真结果表明,放大转发中继选择(SAF)、解码转发中继选择(SDF)协议和HPRS均可获得空间满分集度,而HPRS的中断性能要优于SAF和SDF协议. A hybrid protocol with relay selection （HPRS） is derived to improve the cognitive performance. What a cooperative protocol is chosed is rest with the the source signal relay decoding. The relay with the highest relay-destination signal-to-noise ratio is selected to forward the data. The approximated outage probability formulation and diversity for HPRS is given. Simulation shows that amplify-and-forward with relay selection （SAF）, decode-and-forward with relay selection （SDF） protocol and HPRS can achieve full space diversities, but the HPRS is better than that of both SAF and SDF in outage performance.
作者 唐菁敏 罗涛 乐光新
机构地区 北京邮电大学信息与通信工程学院 西安电子科技大学综合业务网理论及关键技术国家重点实验室
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2011年第3期44-47,共4页 Journal of Beijing University of Posts and Telecommunications
基金 国家自然科学基金项目(60872049 60871042 60971082 60972073) 国家重点基础研究发展计划项目(2009CB320407) 国家重大科技专项项目(2009ZX03003-001 2009ZX03003-011 2010ZX03001-003) ISN国家重点实验室开放基金项目(ISN12-03)
关键词 认知无线电 中继选择 功率受限 中断概率 合作分集 cognitive radio relay selection power constrained outage probability cooperative diversity
分类号 TN929.53 [电子电信—通信与信息系统]
  • 相关文献

参考文献7

  • 1Zhao Yi,Adve R,Lim T J.Improving amplify-and-forward relay networks:optimal power allocation versusselection[].IEEE Wireless Communications.2007
  • 2Sun Chunhua,Ben Letaief K.User cooperation in hetero-geneous cognitive radio networks with interference reduc-tion[].ICC.2008
  • 3Y Guo,G Kang,N Zhang, et al.Outage Performance of Relay-assisted Cognitive-Radio System under Spectrum-Sharing Constraints[].Electronics Letters.2010
  • 4Su Weifeng,Liu Xin.On optimum selection relaying protocols in cooperative wireless networks[].IEEE Transactionson Communications.2010
  • 5Laneman JN,Tse DNC,Wornell GW.Cooperative diversity in wireless networks: Efficient protocols and outage behavior[].IEEE Transactions on Information Theory.2004
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同被引文献41

  • 1Hasna M O,Alouini M S.Outage probability of multihoptransmissions over Nakagami fading channels[C]//ISWC2002.Sardinia:[s.n.],2002:207-208.
  • 2Karagiannidis G K.Performance bounds of multihop wire-less communications with blind relays over generalizedfading channels[J].IEEE Trans on Wireless Commun,2006,5(3):498-503.
  • 3Boyer J,Falconer D D,Yanikomeroglu H.Multi-hopdiversity in wireless relaying channels[J].IEEE Transon Wireless Commun,2004,52(10):1820-1830.
  • 4Shi Yi,Hou Y T.A distributed optimization algorithm formulti-hop cognitive radio networks[C]//INFOCOM 2008.Phoenix:[s.n.],2008:1292-1300.
  • 5Ruan L Z,Lau K N.Decentralized dynamic hop selectionand power control in cognitive multi-hop relay systems[J].IEEE Trans on Wireless Commun,2010,9(10):3024-3030.
  • 6Laneman J N,Wornell G W.Distributed space-time-coded protocols for exploiting cooperative diversity inwireless networks[J].IEEE Trans on Inform Theory,2003,49(10):2414-2425.
  • 7Laneman J N,Wornell G W.Cooperative diversity inwireless networks:efficient protocols and outage behavior[J].IEEE Trans on Inform Theory,2004,50(12):3062-3080.
  • 8JOSEPH MⅢ.Cognitive radio for flexible mobile multimedia communications[J].Journal of Mobile Networks and Applications,2001,6(5):435-441.
  • 9ZHAO Qing,SADLER B M.A survey of dynamic spectrum access[J].IEEE Signal Processing Maga-zine,2007,24(3):79-89.
  • 10HONG Yaowin,HUANG Wanjen,CHIU Fuhsuan,et al.Cooperative communications in resource-con-strained wireless networks[J].IEEE Signal Process-ing Magazine,2007,24(3):47-57.

引证文献6

二级引证文献16

北京邮电大学学报
2011年 第3期

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