2020/01/02 by Xiaojun Yuan, Yuan, Xiaojun, Ying-Jun Angela Zhang +8 · 6 citations
Computer Science · Engineering · Mathematics · #Advanced Wireless Communication Technologies #Antenna Design and Analysis #Energy Harvesting in Wireless Networks #FOS: Computer and information sciences #FOS: Electrical engineering #Information Theory (cs.IT) #Signal Processing (eess.SP) #cs.IT #eess.SP #electronic engineering #information engineering #math.IT
paper · pdf · doi:10.48550/arxiv.2001.00364
openalex publication_date 2020/01/02 · openalex created_date 2020/01/10 · arxiv created 2020/08/17 · arxiv updated 2020/08/18 · openalex updated_date 2026/07/28
Reconfigurable intelligent surfaces (RISs) are regarded as a promising emerging hardware technology to improve the spectrum and energy efficiency of wireless networks by artificially reconfiguring the propagation environment of electromagnetic waves. Due to the unique advantages in enhancing wireless channel capacity, RISs have recently become a hot research topic. In this article, we focus on three fundamental physical-layer challenges for the incorporation of RISs into wireless networks, namely, channel state information acquisition, passive information transfer, and low-complexity robust system design. We summarize the state-of-the-art solutions and explore potential research directions. Furthermore, we discuss other promising research directions of RISs, including edge intelligence and physical-layer security.