速率分割多址接入系统中的协作中继传输策略与优化  

Cooperative Relay Transmission Strategy and Optimization in Rate-Splitting Multiple Access System

作　　者：雷维嘉[1,2] 张智 雷宏江[1,2] 唐宏[1,2] LEI Weijia;ZHANG Zhi;LEI Hongjiang;TANG Hong(School of Communications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Mobile Communications Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《北京邮电大学学报》2024年第2期58-65,共8页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61971080)。

摘　　要：针对两用户系统提出了一种基于速率分割多址接入的协作中继传输策略。首先设计了系统效益函数,以更完善的方式评估协作速率分割多址接入系统的能量成本;然后以最大化系统效益为目标,对预编码矩阵、公共速率分配、发射功率和时间分配进行了联合优化;采用黄金分割搜索法和逐次凸逼近等方法将非凸问题转化为凸问题,并进行了求解。仿真结果显示,与基准方案相比,所提方案能够实现更高的系统效益。A cooperative relay transmission strategy based on rate-splitting multiple access for two-user systems is presented.Firstly,a system efficiency function is designed to evaluate the energy cost of cooperative rate-splitting multiple access systems in a more comprehensive manner.Secondly,to maximize system efficiency,precoding matrices,common rate allocation,transmit power,and time allocation are jointly optimized.Then,We utilize methods such as golden section search and successive convex approximation to transform the non-convex problem into a convex one for solution.The simulation results show that compared with the benchmark scheme,the proposed scheme can achieve higher system efficiency.

关 键 词：速率分割多址接入 协作中继 优化 

分 类 号：TN925[电子电信—通信与信息系统]