论文标题
多对D2D通信由主动RI与空间相关的通道与相位噪声相关联
Multi-Pair D2D Communications Aided by An Active RIS over Spatially Correlated Channels with Phase Noise
论文作者
论文摘要
本文研究了一个由可活动的可重新配置智能表面（RIS）带有相位噪声和直接链接的多对设备对设备（D2D）通信系统。 Ergodic总和速率的近似闭合形式表达在与统计通道状态信息（CSI）的空间相关的里奇亚褪色通道上得出。当里奇亚因素转移到无限时，会提出千古税率的渐近表达，以便在散布环境差的情况下提供见解。在不相关的里奇亚式褪色条件下，呈现了单个D2D对的特殊情况的功率缩放定律，而没有相位噪声。然后，为了解决Ergodic Mus速率最大化问题，提出了一种基于遗传算法（GA）的方法，以进行关节功率控制和离散相移的优化。仿真结果验证了我们的派生的准确性，还表明活动RI的表现优于被动RI。
This paper investigates a multi-pair device-to-device (D2D) communication system aided by an active reconfigurable intelligent surface (RIS) with phase noise and direct link. The approximate closed-form expression of the ergodic sum rate is derived over spatially correlated Rician fading channels with statistical channel state information (CSI). When the Rician factors go to infinity, the asymptotic expressions of the ergodic sum rates are presented to give insights in poor scattering environment. The power scaling law for the special case of a single D2D pair is presented without phase noise under uncorrelated Rician fading condition. Then, to solve the ergodic sum rate maximization problem, a method based on genetic algorithm (GA) is proposed for joint power control and discrete phase shifts optimization. Simulation results verify the accuracy of our derivations, and also show that the active RIS outperforms the passive RIS.
