系统仿真学报 ›› 2015, Vol. 27 ›› Issue (3): 584-590.

• 信息、控制、决策与仿真 • 上一篇    下一篇

认知无线网络自适应功率控制博弈算法

马忠贵, 班莎, 陈桂梅, 陈林旗   

  1. 北京科技大学计算机与通信工程学院通信工程系, 北京 100083
  • 收稿日期:2014-02-24 修回日期:2014-07-22 出版日期:2015-03-08 发布日期:2020-08-20
  • 作者简介:马忠贵(1974-),男,内蒙古,博士,副教授,研究方向为智能通信、认知无线网络;班莎(1990-),女,内蒙古,硕士生,研究方向为认知无线网络、协作通信;陈桂梅(1989-),女,江西,硕士生,研究方向为网络编码、协作通信。
  • 基金资助:
    国家自然科学基金(61072039);北京市优秀人才培养资助项目(2013D009006000002)

Game Theory Based Self-adaptive Power Control Algorithm for Cognitive Radio Networks

Ma Zhonggui, Ban Sha, Chen Guimei, Chen Linqi   

  1. Department of Communication Engineering, School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2014-02-24 Revised:2014-07-22 Online:2015-03-08 Published:2020-08-20

摘要: 为满足认知无线网络环境下各认知用户的需求,综合考虑认知用户距离基站的远近、算法稳定性及用户间的干扰问题,使用非合作博弈论对认知无线网络中的功率控制问题进行建模,提出一种使用收益函数和综合代价函数共同表示效用的自适应功率控制算法,理论证明了该算法存在唯一的纳什均衡解。通过引入综合代价函数,使各认知用户在非合作博弈下包含了协作的行为,从而获得帕累托最优解。Matlab仿真表明,该自适应功率控制算法在满足不同用户对SIR需求不同的前提下,克服了远近效应,降低了认知用户的发射功率,实现了高频效和频谱共享的公平性。

关键词: 认知无线网络, 功率控制, 非合作博弈论, 自适应

Abstract: In order to meet all cognitive users' demands in the Cognitive Radio Networks(CRNs), non-cooperative game theory was used to model power control in the CRNs, and an adaptive power control algorithm for the CRNs was put forward using payoff unction and comprehensive cost function as utility function. Meanwhile, distances from the base station, stability of the algorithm and the interference between different cognitive users were considered. The existence and uniqueness of the Nash equilibrium were analyzed. By using the comprehensive cost function, each cognitive user in a non-cooperative game becomes cooperative and the Nash equilibrium can be convergent to Pareto-optimal solution. Comparing with other distributed algorithms, simulation results show that the proposed power control algorithm can overcome the near-far effect, greatly decrease the transmitting power of the cognitive users, and achieve fair spectrum share among users in the premise of meeting the SIR demand of different cognitive users.

Key words: cognitive wireless networks, power control, non-cooperative game theory, self-adaptive

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