干扰受限系统的认知用户功率控制算法  

Power Control Algorithm for Cognitive Users in Interference-limited System

作　　者：水永升[1] 酆广增[1] 

机构地区：[1]南京邮电大学通信与信息工程学院,南京210003

出　　处：《计算机工程》2010年第19期128-131,共4页Computer Engineering

基　　金：国家自然科学基金资助项目(60472104)

摘　　要：根据认知无线电系统中认知用户的不同通信需求,结合干扰温度模型和非合作博弈理论,以单小区CDMA为系统平台,提出基于SINR的对数效用函数的干扰受限认知无线电系统功率控制算法。仿真实验结果表明,与经典SINR平衡算法及Koskie-Gajic算法相比,该算法在满足认知用户目标SINR和主用户干扰温度限制的前提下,通过适当增大认知用户发射功率,能够满足认知用户高速数据通信的需要。To meet the communication needs between licensed users and secondary users in cognitive radio and to ensure that the unimpaired of licensed users,combined with interference temperature model and non-cooperative game theory,a logarithmic utility power control algorithm is presented for interference-limited single-cell CDMA cognitive radio system based on SINR.The analysis and simulation results show that the proposed algorithm,compared with the SINR balancing algorithm and the Koskie-Gajic algorithm,is at the premise of guaranteeing the secondary users＇ target SINR as well as the licensed users＇ interference temperature constraints,can realize the secondary users＇ high data speed communication with a proper increase of the secondary users＇ transmitting power.

关 键 词：认知无线电 干扰受限系统 功率控制 非合作博弈 对数效用函数 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]