Ray Tracing Based 6G RIS-Assisted MIMO Channel Modeling and Verification
Jialing Huang, Cheng‐Xiang Wang, Songjiang Yang, Yinghua Wang, Yingjie Xu, Yingzhuo Sun, Jie Huang, Fu‐Chun Zheng
Abstract
Reconfigurable intelligent surface (RIS) has become one of the key technologies for the sixth-generation (6G) communication systems due to its advantages of being programmable, low energy consumption, and easy deployment. In this paper, a novel RIS-assisted deterministic channel model is proposed based on ray tracing (RT). The multipath components (MPCs) in the wireless propagation environment are divided into two types, i.e. MPCs with and without interaction to RIS. Multipath information of those two types of MPCs are obtained through the designed segmented RT simulations. Then the channel impulse response (CIR) of RIS-assisted channel can be extracted through data processing. To verify the accuracy and effectiveness of the proposed method, the simulation results including path loss (PL), delay power spectral density (PSD), angular PSD, delay spread (DS), and angular spread (AS) are compared with the channel measurement data. Good agreements are obtained regardless of whether RIS is in the mirror placement state.