Reconfigurable intelligent surface (RIS)-assisted communications is one of the promising candidates for next generation wireless networks by controlling the propagation environment dynamically. In this study, a channel modeling strategy for RIS-assisted wireless networks is introduced in sub-6 GHz bands by considering both far-field and near-field behaviours in transmission. We also proposed an open-source physical channel simulator for sub-6 GHz bands where operating frequency, propagation environment, terminal locations, RIS location and size can be adjusted. It is demonstrated via extensive computer simulations that an improved achievable rate performance is obtained in the presence of RISs for both near-field and far-field conditions.

翻译：通过动态控制传播环境,可重新配置的智能表面辅助通信是下一代无线网络有希望的候选产品之一,在这项研究中,通过考虑远地和近地的传输行为,在亚6千兆赫波段引入了RIS辅助无线网络的频道示范战略,我们还提议为亚6千兆赫波段提供开放源物理信道模拟器,可调整操作频率、传播环境、终端位置、RIS位置和大小,通过广泛的计算机模拟显示,在近地和远地条件的RIS在场的情况下,可提高可实现的速率性能。