Partial Multiplexing Power-Frequency Multiple Access for Active STAR-RIS Systems: Outage and Ergodic Perspectives Authors Anh-Tu Le; Thai-Hoc Vu; Tan N. Nguyen; Thuong-Le Tien; Miroslav Voznak Publication year 2025 Index (WoS/Scopus) WoS Publisher IEEE Journal IEEE Wireless Communications Letters Link https://ieeexplore.ieee.org/document/10816693