论文标题
MMWave宽带MIMO RIS辅助通信的光谱效率优化
Spectral Efficiency Optimization for mmWave Wideband MIMO RIS-assisted Communication
论文作者
论文摘要
可重新配置的智能表面（RIS）是被动的或半循环的异质跨面，由许多可调元素组成。 RIS正在获得一种有希望的新技术，以使传播环境转变为可控参数。在本文中，我们研究了使用28 GHz频带在下行链路宽带MIMO传输中每次提取功率分配矩阵和多元RIS相移的共同设计。我们在改善RIS辅助链接方面的贡献包括（1）使用Pathloss和阻塞建模增强的系统建模，以及均匀的矩形阵列（URA）设计，（2）梯度上升共同设计算法的设计，以及（3）渐近（3）渐近（BIG O）对拟议中的算法的复杂性分析。
Reconfigurable Intelligent Surfaces (RIS) are passive or semi-passive heterogeneous metasurfaces and consist of many tunable elements. RIS is gaining momentum as a promising new technology to enable transforming the propagation environment into controllable parameters. In this paper, we investigate the co-design of per-subcarrier power allocation matrices and multielement RIS phase shifts in downlink wideband MIMO transmission using 28 GHz frequency bands. Our contributions in improving RIS-aided links include (1) enhanced system modeling with pathloss and blockage modeling, and uniform rectangular array (URA) design, (2) design of gradient ascent co-design algorithm, and (3) asymptotic (Big O) complexity analysis of proposed algorithm and runtime complexity evaluation.
