北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2012, Vol. 35 ›› Issue (2): 37-40.doi: 10.13190/jbupt.201202.37.tangjm

• 论文 • 上一篇    下一篇

重叠共享方式下多跳协作分集感知系统性能

唐菁敏1,2,罗涛2,龙华1,刘增力1,乐光新2   

  1. 1 昆明理工大学 信息工程与自动化学院, 昆明 650050; 2 北京邮电大学 信息与通信工程学院, 北京 100876
  • 收稿日期:2011-05-19 修回日期:2011-06-13 出版日期:2012-04-28 发布日期:2012-01-05
  • 通讯作者: 唐菁敏 E-mail:tang_min213@163.com
  • 作者简介:唐菁敏(1979-),男,博士,E-mail:tang_min213@163.com
  • 基金资助:

    国家自然科学基金项目(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);云南省社会发展科技计划项目(2009CA027)

Performance of Multi-Hop Cooperative Diversity Cognitive System in Underlay Sharing Mode

TANG Jing-min1,2,LUO Tao2,LONG Hua1,LIU Zeng-li1,YUE Guang-xin2   

  1. 1 Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650050, China; 2 School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China  
  • Received:2011-05-19 Revised:2011-06-13 Online:2012-04-28 Published:2012-01-05

摘要:

为了得到感知网络传输性能的理论关系式,针对重叠共享(US)方式下的多跳解码转发(DF)协作分集感知网络进行了性能分析,推导出在高信噪比条件下感知网络的中断概率近似表达式及其分集度.理论分析与仿真结果表明,在高信噪比条件下,虽然多跳DF协作分集感知系统不能获得空间分集增益,但随着跳数的增加,感知系统中断性能有所改善.

关键词: 感知无线电, 中断概率, 空间分集; 分集增益

Abstract:

By analyzing the multi-hop cooperative cognitive diversity network in underlay sharing(US) mode, an approximate outage probability formulation and diversity order is derived for decode-and-forward(DF) protocol in high signal-to-noise ratio to get theory equations of cognitive transport performance. A good outage performance of cognitive system with the increase of hop number in high signal-to-noise ratio is obtained. Simulation shows that multi-hop DF cooperative cognitive diversity system achieves no more space diversity gain.

Key words: cognitive radio, outage probability, space diversity, diversity gain

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