认知无线网络中基于多用户公平性的功率分配  

Power Allocation Based-on Multi-user Fairness in Cognitive Wireless Networks

作　　者：陈波[1] 王欢[2] 唐伦[2] 

机构地区：[1]中国人民银行重庆营业管理部,重庆401147 [2]重庆邮电大学移动通信技术重点实验室,重庆400065

出　　处：《计算机技术与发展》2011年第4期77-80,共4页Computer Technology and Development

基　　金：重庆市教育科研计划项目(KJ090501)

摘　　要：研究认知无线网络中保证多用户场景下保证用户速率需要的功率分配问题。提出了保证用户公平性的最小化用户实际传输速率与期望速率差值的优化模型,给出了一种集中式功率分配算法1;为了减少减少迭代次数,提出了一种改进的集中式算法2;最后给出了一种分布式的求解算法3。仿真结果表明,三种求解算法都收敛于最优解,且集中式算法2的迭代次数明显小于集中式算法1,分布式功率分配算法有利于减少实现的复杂度。Studies the power allocation for insuring the multi-user fairness.In order to minimize the gap between the user expected rate and achived rate,an optimization model is proposed.A centralized algorithm 1 of equal power allocation is presented,then the centralized algorithm 2 is proposed to reduce the number of iterations.At last,a distributed algorithm 3 is given to solve th optimal problem.The simulation results show that the three algorithms converge to the optimal solution,and the centralized algorithm 2 significantly less than the number of iterations of centralized algorithm 1.Distributed power allocation algorithm can reduce the implementation complexity.

关 键 词：认知无线网络 公平性 功率分配 分布式算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]