认知无线电MIMO中基于博弈论的功率控制算法  

Power control algorithm based on game theory for cognitive radio MIMO system

作　　者：彭青[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《电子测量技术》2012年第11期129-133,共5页Electronic Measurement Technology

基　　金：广西自然科学基金项目(0991241)

摘　　要：认知无线电MIMO通信系统结合了认知无线电技术和MIMO技术的双重优势,能够极大的提高频谱利用率和传输速率。针对认知无线电MIMO系统的功率控制问题,利用博弈论,首先建立了系统的非合作功率控制博弈模型,然后基于Goodman等人所提出的收益函数,提出了分布式迭代功率控制算法,并且对系统进行分布式功率控制。数值结果表明,算法具有快速收敛的特性,6～8次即可达到收敛。此外,随着天线数的增加,各用户发射功率不断减小,系统的收益逐渐增加。Cognitive radio MIMO communication system can greatly improve spectrum efficiency and transmission rates. Aiming at solving the problem of its power control, the paper firstly presents a non-cooperative power control game model by using analysis methods of game theory. Secondly,we propose a distributed iteration power control algorithm. The proposed algorithm can implement distributed power control. Thirdly, numerical simulation results show that the proposed algorithm has fast convergence after 6--8 times iteration. Moreover, each of user＇s transmission power will decrease as the numbers of antennas increase,as well as the benefit of system gradually increases.

关 键 词：认知无线电 MIMO 功率控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]