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基于最佳中继选择的协作频谱感知方案研究 被引量：23

Cooperative Spectrum Sensing in Multiuser Cognitive Radio Networks with Best Relay Selection
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摘要 本文提出了一种基于最佳中继的多用户协作频谱感知方案,通过认知无线电网络中多用户间的相互协作,可以获得明显的空间分集增益,从而改善认知用户的检测性能.针对所提出的多用户协作感知方案,在瑞利衰落环境下分析了相应的系统检测概率,同时也理论推导了传统非协作方案的感知性能.根据检测概率的解析式,对非协作方案和多用户协作方案,进行了相应的数值实验和性能比较.与非协作感知方案相比,多用户协作方案能够显著提高主用户的检测概率.此外,随着候选中继用户数目增加,多用户协作方案对主用户检测概率的改善量越加明显. We propose a cooperative spectrum sensing scheme based on the best relay selection in a multiple-user cognitive radio network,which can improve the system sensing performance by achieving the spatial diversity gain.Closed-form expressions of detection probability for the traditional non-cooperative sensing scheme and the proposed scheme are derived in Rayleigh fading channels to show the effects of multiuser cooperation on the detection performance.Furthermore,we compare the non-cooperative scheme with the multiuser cooperation scheme in terms of detection probability through numerical experimentations.Numerical results illustrate that the detection probability of our scheme is improved greatly compared to traditional non-cooperation and moreover,with the growth of the number of candidate relays,the improvement of detection probability achieved by our scheme is larger.
作者 朱佳 郑宝玉 邹玉龙
机构地区 南京邮电大学信号处理与传输研究院
出处 《电子学报》 EI CAS CSCD 北大核心 2010年第1期92-98,共7页 Acta Electronica Sinica
基金 江苏省自然科学基金重点项目(No.BK2007729) 江苏省博士研究生科研创新计划(No.CX08B-080Z CX09B-150Z) 江苏省高校自然科学重大基础研究项目(No.06KJA51001) 国家863高技术研究发展计划(No.2009AA01Z241)
关键词 认知无线电 协作感知 检测概率 分集增益 cognitive radio cooperative spectrum sensing multiuser diversity detection probability
分类号 TN92 [电子电信—通信与信息系统]
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参考文献21

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同被引文献272

  • 1朱佳,郑宝玉,邹玉龙.一种新的多用户协作频谱感知方案及其检测时间分析[J].中国科学：信息科学,2010,40(3):481-491. 被引量：2
  • 2谭学治,姜靖,孙洪剑.认知无线电的频谱感知技术研究[J].信息安全与通信保密,2007,29(3):61-63. 被引量：26
  • 3余官定,张朝阳,陈雁,来萍,仇佩亮.OFDM中继系统的中继子载波对选择和功率分配[J].电子与信息学报,2007,29(2):265-268. 被引量：6
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  • 8LI P, RONG M. Reuse partitioning based frequeneiy planning for cellular network with two-hop fixed relay nodes [C]// Prco. of IEEE PIMRC. Helsinki: IEEE, 2006: 1-5.
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  • 10LIP. Reuse one frequency planning for two-hop cellular system with fixed relay nodes [C]// Proc. of IEEE WCNC. Kowloon: IEEE, 2007: 2253-2258.

引证文献23

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电子学报
2010年 第1期

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