基于加权和速率的多播系统波束赋形算法  

Beamforming Algorithm for Multicast System Based on Weighted Sum Rate

作　　者：杜博[1] 李莎莎[1] 凌云[1] DU Bo;LI Shasha;LING Yun(The 28th Research Institute of China Electronics Technology Group Corporation,Nanjing 210007,China)

机构地区：[1]中国电子科技集团公司第二十八研究所,南京210007

出　　处：《指挥信息系统与技术》2018年第4期34-39,共6页Command Information System and Technology

基　　金：中国电子科技集团公司军工发展基金资助项目

摘　　要：针对单组多播系统中波束赋形设计问题,提出了一种新优化目标,即加权和速率。尽管建立的优化问题为非凸问题,但可利用最优解特性将其转化为等效的凸问题。推导出部分特殊场景下最优解的闭合表达式,并针对一般场景提出了一种基于加权和速率的多播系统波束赋形算法。最后,通过仿真验证了该算法有效性。与现有算法相比,该算法在选取合适权重时可有效提升系统中用户的最低速率、平均速率及公平性。Aimed at the beamforming design problem in the single group multicast system,a new optimization goal,the weighted sum rate is proposed.Although the optimization problem is nonconvex,it can be converted to an equivalent convex problem utilizing the properties of optimized solution.The closed expressions of the optimized solution are derived in some special scenes.Aimed at the general scene,a beamforming algorithm for the multicast system based on the weighted sum rate is proposed.Finally,the validity of the algorithm is verified by the simulation.Compared with the existing algorithms,the algorithm can effectively improve the minimum rate,the average rate and the fairness of the user by selecting the appropriate weight.

关 键 词：波束赋形 多播 加权和速率 凸优化 

分 类 号：TN914.3[电子电信—通信与信息系统]