Bilian Xu Ting Zhou Feifei Gao 0001 Tianheng Xu Honglin Hu RIS-Aided MIMO Communications: Angle-Dependent Amplitude-Phase Response Model and Capacity Analysis. 290-294 2025 February 14 IEEE Wirel. Commun. Lett. 2 https://doi.org/10.1109/LWC.2024.3496569 db/journals/wcl/wcl14.html#XuZGXH25 streams/journals/wcl