Reconfigurable intelligent surface (RIS) is an emerging technique employing metasurface to reflect the signal from the source node to the destination node. By smartly reconfiguring the electromagnetic (EM) properties of the metasurface and adjusting the EM parameters of the reflected radio waves, RIS can turn the uncontrollable propagation environment into an artificially reconfigurable space, and thus, can significantly increase the communications capacity and improve the coverage of the system. In this paper, we investigate the far field channel in which the line-of-sight (LOS) propagation is dominant. We propose an antenna model that can characterize the radiation patterns of realistic RIS elements, and consider the signal power received from the two-hop path through RIS. System-level simulations of network performance under various scenarios and parameter.
翻译:重新配置智能表面(RIS)是一种新兴技术,它利用元表面反映源节点到目的地节点的信号。通过精巧地重新配置元表面的电磁特性和调整反射无线电波的EM参数,RIS可以将无法控制的传播环境转化为人工重新配置的空间,从而可以大大提高通信能力,扩大系统的覆盖范围。在本文中,我们调查视野线传播占主导地位的远方通道。我们提出了一个天线模型,可以描述现实的RIS元素的辐射模式,并考虑通过RIS从双关路径获得的信号能量。在各种情景和参数下对网络性能进行系统级模拟。