J4 ›› 2010, Vol. 37 ›› Issue (2): 186-191.doi: 10.3969/j.issn.1001-2400.2010.02.002

• 研究论文 • 上一篇    下一篇



  1. (西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安  710071)
  • 收稿日期:2008-12-04 出版日期:2010-04-20 发布日期:2010-06-03
  • 通讯作者: 李建东
  • 作者简介:李建东(1962-),男,教授,博士,E-mail: jdli@mail.xidian.edu.cn.
  • 基金资助:


Fast adaptive power control approach for cognitive radio networks

LI Jian-dong;XUE Fu-guo;YANG Chun-gang;LI Wei-ying;SHI Hua   

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China)
  • Received:2008-12-04 Online:2010-04-20 Published:2010-06-03
  • Contact: LI Jian-dong



关键词: 自适应效用函数, 认知无线电, 非合作博弈功率控制, 纳什均衡


An adaptive utility function based on the sigmoid function is proposed, which is related to the signal-to-interference plus noise (SINR) threshold and the obtained SINR, so that it will help to implement the opportunistic spectrum access by adaptively adjusting the SINR threshold, and it will satisfy the QoS requirement of multiple secondary users (SUs) fast. Meanwhile, considering the fairness among SUs, we rebuilt the pricing function to improve the Pareto optimality of the Nash equilibrium solution (NES). Based on all this, a power control model is investigated from the perspective of the non-cooperative game theory. The model is proved to be the super-modular game, and it can guarantee the existence and uniqueness of the NES. Simulation results show that the proposed power control algorithm can lead to converfence after 10 iterations, and that compared to the referenced algorithm it can save 10% power consumption and achieve mostly 15% improvement on the final utility.

Key words: adaptive utility function, cognitive radio, non-cooperative game power control, Nash equilibrium