华南理工大学学报(自然科学版) ›› 2014, Vol. 42 ›› Issue (1): 52-58.doi: 10.3969/j.issn.1000-565X.2014.01.010

• 电子、通信与自动控制 • 上一篇    下一篇

多信道认知无线电频谱感知次用户和功率分配

刘鑫 仲伟志 孔繁锵 井庆丰   

  1. 南京航空航天大学 航天学院,江苏 南京 210016
  • 收稿日期:2013-09-06 修回日期:2013-11-07 出版日期:2014-01-25 发布日期:2013-12-01
  • 通信作者: 刘鑫(1984-),男,博士,讲师,主要从事认知无线电和卫星通信研究. E-mail:liuxinstar1984@nuaa.edu.cn
  • 作者简介:刘鑫(1984-),男,博士,讲师,主要从事认知无线电和卫星通信研究.
  • 基金资助:

    国家自然科学基金资助项目(61102069, 61301105);南京航空航天大学引进人才科研启动基金资助项目(56YAH13029);南京航空航天大学青年科技创新基金资助项目(NS2013085)

Secondary User and Power Allocation in Spectrum Sensing of Multi- Channel Cognitive Radio

Liu Xin Zhong Wei- zhi Kong Fan- qiang Jing Qing- feng   

  1. College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,China
  • Received:2013-09-06 Revised:2013-11-07 Online:2014-01-25 Published:2013-12-01
  • Contact: 刘鑫(1984-),男,博士,讲师,主要从事认知无线电和卫星通信研究. E-mail:liuxinstar1984@nuaa.edu.cn
  • About author:刘鑫(1984-),男,博士,讲师,主要从事认知无线电和卫星通信研究.
  • Supported by:

    国家自然科学基金资助项目(61102069, 61301105);南京航空航天大学引进人才科研启动基金资助项目(56YAH13029);南京航空航天大学青年科技创新基金资助项目(NS2013085)

摘要: 为提高多信道认知无线电的吞吐量,提出了协作频谱感知子信道次用户和传输功率的联合分配算法.该算法基于主用户的存在状态,在约束次用户协作检测概率和总功率的基础上,以最大化次用户所有子信道的吞吐量总和为目标,通过交替方向优化获得子信道次用户和传输功率的联合分配.仿真结果表明: 文中提出的联合分配算法通过较少的迭代次数就可以获得最优值,并且能够根据子信道状态动态地分配子信道次用户和传输功率,提高了次用户的吞吐量.

关键词: 认知无线电, 协作频谱感知, 次用户, 功率分配, 吞吐量, 检测概率

Abstract:

In order to improve the throughput of multi- channel cognitive radio (CR),a joint allocation algorithm ofsecondary user (SU) and transmission power for each sub- channel in the cooperative spectrum sensing is proposed.Based on the present state of the primary user,the proposed algorithm aims to maximize SU's total throughput overall the sub- channels subjected to the constraints such as SU's cooperative detection probability and total power,andachieves the joint allocation of SU and transmission power for each sub- channel through alternative direction optimi-zation.Simulated results show that the proposed algorithm helps to obtain the optimal value with less iteration andimproves SU's throughput by dynamically allocating the SU and the transmission power of each sub- channel accor-ding to the sub- channel state.

Key words: cognitive radio, cooperative spectrum sensing, secondary user, power allocation, throughput, detec-tion probability