基于非正交多址接入中继通信系统的功率优化  

Power Allocation Optimization of Cooperative Relaying Systems Using Non-orthogonal Multiple Access

作　　者：黄容兰[1] 刘云 李啟尚 唐文 HUANG Ronglan;LIU Yun;LI Qishang;TANG Wen(Guangxi Colleges and Universities Key Laboratory of Image Processing and Intelligent Information System, Wuzhou University, Wuzhou 543002, China;College of Information Science and Technology, Zhongkai University ofAgriculture and Engineering, Guangzhou 510225, China;Department of Equipment Maintenance of 95795 Troop of the PLA, Guilin 541003, China)

机构地区：[1]梧州学院广西高校图像处理与智能信息系统重点实验室,梧州543002 [2]仲恺农业工程学院信息科学与技术学院,广州510225 [3]95795部队教研部装备维修教研室,桂林541003

出　　处：《电子与信息学报》2019年第8期1909-1915,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61501531);梧州学院2012校级科研项目(2012C001)~~

摘　　要：针对基于非正交多址接入(NOMA)技术的中继通信系统,在兼顾系统性能与计算复杂度的基础上,该文提出一种结合统计信道信息(S-CSI)和瞬时信道信息(I-CSI)的混合功率分配策略(H-PAS)来有效实现上述折中。仿真结果表明,NOMA方案在H-PAS策略下,一方面比单纯利用S-CSI时的传统正交多址接入技术具有更高的频谱效率;另一方面在和速率差别不大的情况下,又比单纯利用I-CSI时的NOMA方案具有更低的信令开销和计算复杂度。A novel scheme termed Hybrid Power Allocation Strategy(H-PAS), which is integrated with Statistical Channel State Information(S-CSI) and Instantaneous Channel State Information(I-CSI), is proposed for Non-Orthogonal Multiple Access(NOMA) based on cooperative relaying systems to achieve a better performance-complexity tradeoff. Simulation results demonstrate that, with the proposed H-PAS, on the one hand, NOMA shows distinct advantage on the sum-rate compared with conventional orthogonal multiple access techniques in which only the knowledge of S-CSI is available;On the other hand, NOMA reduces the signaling overhead and computational complexity at the expense of marginal sum rate degradation when compared with the cases in which only the knowledge of I-CSI is available for it.

关 键 词：非正交多址接入 和速率 功率分配 

分 类 号：TN929[电子电信—通信与信息系统]