Effects of realistic reradiation models in digital reconfigurable intelligent surfaces

作     者：Marco Di Renzo Abdelhamed Mohamed Alessio Zappone Gabriele Gradoni Marco Rossi Massimo Moccia Giuseppe Castaldi Vincenzo Galdi 

作者机构：Universite Paris-SaclayCNRSCentraleSupelecLaboratoire des Signaux et Systemes3 Rue Joliot-CurieGif-sur-Yvette 91192France University of Cassino and Lazio MeridionaleDepartment of Electrical and Information EngineeringVia Gaetano Di Biasio 43Cassino(FR)03043Italy University of NottinghamSchool of Mathematical Sciences and Department of Electrical and Electronics EngineeringUniversity ParkNottingham NG72RDUK dUniversity of CambridgeDepartment of Computer Science and Technology15 J.J.Thomson AvenueCambridge CB30FDUK University of SannioDepartment of EngineeringCorso Garibaldi 107Benevento 82100Italy 

出 版 物：《Journal of Information and Intelligence》 (信息与智能学报（英文）)

年 卷 期：2023年第1卷第3期

页      面：238-252页

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the European Commission through the H2020 ARIADNE project(871464) the H2020 RISE-6G project(101017011) the H2020 MetaWireless project(956256) the H2020 PAINLESS project(812991) the Fulbright Foundation under the“Programme National Chercheurs 2021”funding scheme,and the Agence Nationale de la Recherche(ANR)through the PEPR-5G project 

主　　题：Wireless communications Reconfigurable intelligent surfaces Dynamic metasurfaces Modeling Performance evaluation Optimization 

摘      要：Reconfigurable intelligent surfaces(RISs)are a promising technology for wireless communication applications,but their performance is often optimized using simplified electromagnetic reradiation *** this study,we explore the impact on the RIS performance of more realistic assumptions,including the(possibly imperfect)quantization of the reflection coefficients,subwavelength inter-element spacing,near-field location,and presence of electromagnetic *** find that design constraints can cause an RIS to reradiate power in unwanted ***,it is important to optimize an RIS by considering the entire reradiation ***,our study indicates that a 2-bit digitally controllable RIS with a nearly constant reflection amplitude and RIS elements with a size and inter-element spacing between(1/8)th and(1/4)th of the signal wavelength may offer a reasonable tradeoff between performance,complexity,and cost.