计算机应用 ›› 2012, Vol. 32 ›› Issue (07): 1823-1826.DOI: 10.3724/SP.J.1087.2012.01823

• 网络与通信 • 上一篇    下一篇

认知无线电中快速收敛的功率控制博弈算法

朱冰莲,运明华,钱明达,张磊   

  1. 重庆大学 通信工程学院,重庆400044
  • 收稿日期:2012-01-16 修回日期:2012-03-06 发布日期:2012-07-05 出版日期:2012-07-01
  • 通讯作者: 运明华
  • 作者简介:朱冰莲(1959-),女,四川富顺人,教授,博士,主要研究方向:现代信号处理;运明华(1986-),男,河南驻马店人,硕士研究生,主要研究方向:认知无线电中的功率分配;钱明达(1987-),男,河南信阳人,硕士研究生,主要研究方向:认知无线电中的功率分配;张磊(1986-),男,江苏徐州人,博士研究生,主要研究方向:智能信息处理。
  • 基金资助:

    中央高校科研基金资助项目(CDJXS10161114)

Power control algorithm with faster convergence based on non-cooperative game for cognitive radio networks

ZHU Bing-lian,YUN Ming-hua,QIAN Ming-da,ZHANG Lei   

  1. College of Communication Engineering, Chongqing University, Chongqing 400044, China
  • Received:2012-01-16 Revised:2012-03-06 Online:2012-07-05 Published:2012-07-01
  • Contact: YUN Ming-hua

摘要: 针对认知无线电中分布式功率控制算法收敛速度较慢的问题,提出了一种新的非合作博弈模型下的功率控制算法。算法主要通过构造基于信干比(SIR)的正切型代价函数来减少迭代次数,从而提高收敛速度。仿真结果表明,所提算法在满足认知用户信干比要求和主用户干扰温度容限下,与Koskie-Gajic算法和自适应功率控制(CR-NCPCG)算法相比,在收敛速度上有了大幅度的提高,能更好地满足系统实时性要求,并且在用户数小于20时,平均信干比至少提高了0.3dB,可以实现对认知用户发射功率的有效控制。

关键词: 功率控制, 非合作博弈, 代价函数, 收敛性, 信干比

Abstract: Concerning the slow convergence of distributed power control algorithm in cognitive radio, a novel algorithm based on non-cooperative game was proposed for cognitive radio system. A Signal-to-Interference Ratio (SIR)-based tangent cost function of fewer iterations was designed to improve the convergence. The simulation results demonstrate that, compared with the Koskie-Gajic algorithm and the Cognitive Radios-Non-Cooperative Power Control Game (CR-NCPCG) algorithm, the proposed algorithm at the premise of satisfying the secondary users' demand for SIR and the primary user's interference temperature constraint, not only can fast converge, but also has higher average SIR with at least 0.3dB when the number of users is less than twenty. It can control the power of secondary users effectively.

Key words: power control, non-cooperative game, cost function, convergence, Signal-to-Interference Ratio (SIR)

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