Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (1): 52-58.doi: 10.3969/j.issn.1000-565X.2014.01.010

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

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)

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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