上海交通大学学报

上海交通大学学报（自然版） ›› 2012, Vol. 46 ›› Issue (06): 882-886.

• 无线电电子学、电信技术 • 上一篇    下一篇

协同认知网络中功率分配与协同节点选择

刘忠军1，2，张冬梅1，张祯松1，徐友云1    

  1. (1. 解放军理工大学 通信工程学院， 南京 210007； 2. 中国人民解放军61062部队， 北京 100091)
  • 收稿日期:2011-05-21 出版日期:2012-06-28 发布日期:2012-06-28
  • 基金资助:

    国家重点基础研究发展规划（973）项目(2009CB3020402)，国家高技术研究发展计划（863）项目(2009AA01Z249)资助

Power Allocation and Cooperative Node Selection in Cooperative Cognitive Radio Networks

 LIU  Zhong-Jun-1, 2 , ZHANG  Dong-Mei-1, ZHANG  Zhen-Song-1, XU  You-Yun-1   

  1. (1. Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China; 2 China’s PLA 61062 Troop, Beijing 100091, China)
  • Received:2011-05-21 Online:2012-06-28 Published:2012-06-28

摘要：  针对认知无线网络中次级用户通信性能优化问题，以最大化次级用户的传输速率为目标，研究引入协同通信的认知网络中协同节点选择和发送功率分配问题.通过引入中断概率增量因子，简化主用户接收机中断容量损失受限的约束条件，同时依据目标函数的不同将问题分解，对形成的原优化问题进行了有效求解.仿真结果表明，文中算法实现了最优的功率分配和协同节点选择，在保护主用户通信业务的前提下，有效地提升了次级用户的传输速率.

关键词: 认知无线电, 协同通信, 协同节点选择, 功率分配, 中断容量损失

Abstract:  Focusing on the issue of the performance optimization of the secondary users’ communication in cognitive radio networks, this paper investigated the cooperative node selection and power allocation problem in cooperative cognitive radio networks in order to maximize the transmission rate of the secondary users. By introducing an outage probability increment coefficient which makes the constraint simplified, the original optimization problem was effectively handled by the decomposition method according to the objective functions. The simulation results indicate that the optimal power allocation and cooperative node selection can be obtained, which improves the secondary users’ transmission rate performance while the primary users’ service is protected.

Key words: cognitive radio, cooperative communication, cooperative node selection, power allocation, outage loss

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