摘要
研究了认知无线电系统中的功率分配策略,分析了基于博弈策略的最佳效用函数.针对干扰受限条件,提出了一种适合分布式场景的,根据认知用户对主用户产生的干扰比例来限制自身最大发射功率的方法.通过计算机仿真,考察了不同比例分配方式下的系统性能,并对仿真结果进行了比较.仿真结果表明,各认知用户对主用户干扰比例相同的功率限制策略可使系统获得较好的性能.
The power allocation strategy based on the game theory for the cognitive radio system is studied. The best utility function for the game-theoretic strategy is analyzed. A distributed power allocation strategy is proposed,where the limit power for each cognitive user is based on its proportional interference to the primary user and satisfying the constraint of the total power interference to the primary user. The comparent performances of the different proportional schemes are investigated. Simulations show that the best power limit for each cognitive user is to produce the same interference to the primary user.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2010年第4期126-130,共5页
Journal of Beijing University of Posts and Telecommunications
基金
国家重点基础研究发展计划项目(2009CB320400)
中央高校基本科研业务费资助项目(2009RC0107)
关键词
认知无线电
博弈
功率分配
cognitive radio
game theory
power allocation
