论文标题
星际辅助Noma系统的联合位置和横梁成形设计
Joint Location and Beamforming Design for STAR-RIS Assisted NOMA Systems
论文作者
论文摘要
在其附近研究了同时传输和反映可重构智能表面（星际）辅助非正交多访问（NOMA）通信系统的协助，在其附近，在预定义的区域内部署了一个星际 - 用于建立用户的通信链接。基于波束形成器的NOMA和基于簇的NOMA方案均在多Antenna基站（BS）使用。对于每个方案，星形部署位置，星形 - ris的被动传输和反映波束成形（BF）以及BS处的主动BF共同优化，以最大程度地提高用户的加权总和（WSR）。为了解决所得的非凸问题，提出了交替的优化（AO）算法，其中连续的凸近似（SCA）和半限定编程（SDP）方法被调用以迭代地解决每个子问题的非共同点。数值结果表明，1）通过优化Star-Ris的特定部署位置可以显着提高WSR性能； 2）基于波束形式和基于簇的Noma都更喜欢不对称的星形 - 牵引力部署。
Simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted non-orthogonal multiple access (NOMA) communication systems are investigated in its vicinity, where a STAR-RIS is deployed within a predefined region for establishing communication links for users. Both beamformer-based NOMA and cluster-based NOMA schemes are employed at the multi-antenna base station (BS). For each scheme, the STAR-RIS deployment location, the passive transmitting and reflecting beamforming (BF) of the STAR-RIS, and the active BF at the BS are jointly optimized for maximizing the weighted sum-rate (WSR) of users. To solve the resultant non-convex problems, an alternating optimization (AO) algorithm is proposed, where successive convex approximation (SCA) and semi-definite programming (SDP) methods are invoked for iteratively addressing the non-convexity of each sub-problem. Numerical results reveal that 1) the WSR performance can be significantly enhanced by optimizing the specific deployment location of the STAR-RIS; 2) both beamformer-based and cluster-based NOMA prefer asymmetric STAR-RIS deployment.
