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Sparsity Modulation for 6G Communications

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中国通信:英文版 2023年第10期20卷 I0002-I0005页

作者： Jun Li Shuping Dang Jia Hou marco di renzo Mohamed-Slim Alouini the School of Electronics and Communication Engineering at Guangzhou University GuangzhouChina School of Electrical Electronic and Mechanical EngineeringUniversity of Bristol Soochow University SuzhouChina the Intelligent Physical Communications group in the Laboratory of Signals and Systems(L2S)at Paris-Saclay University-CNRS and Centrale Supelec ParisFrance IEEE

Sparsity modulation is a promising technology for the sixth generation(6G)of communication networks,which satisfies the high requirements in terms of spectral efficiency(SE)and energy efficiency(EE).Currently,many representative sparsity modulation schemes,such as spatial modulation,index modulation,media-based modulation,reconfigurable intelligent surface(RIS)-based/reflecting modulation,and subcarrier number modulation,have attracted the attention of the wireless research *** from conventional amplitude-phase modulation schemes,sparsity modulation employs one or more modulation dimension(s)in addition to the conventional amplitude-phase constellation,so as to form higher-dimensional modulation schemes,which considerably enhance the SE at a reduced implementation complexity under proper system *** is worth noting that the modulation dimensions in current sparsity modulation schemes are not fully explored due to limited resources.

关键词： dimensions networks dimension

Reconfiguring wireless environments via intelligent surfaces for 6G: reflection, modulation, and security

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Science China(Information Sciences) 2023年第3期66卷 60-79页

作者： Jindan XU Chau YUEN Chongwen HUANG Naveed UL HASSAN George C.ALEXANDROPOULOS marco di renzo Mérouane DEBBAH Engineering Product Development Pillar Singapore University of Technology and Design College of Information Science and Electronic Engineering Zhejiang University Department of Electrical Engineering Lahore University of Management Sciences Department of Informatics and Telecommunications National and Kapodistrian University of Athens Technology Innovation Institute Université Paris-Saclay CNRS Centrale Supélec Laboratoire des Signaux et Systèmes

The reconfigurable intelligent surface(RIS) has been recognized as an essential enabling technology for sixth-generation(6G) mobile communication networks. An RIS comprises a large number of small and low-cost reflecting elements whose parameters can be dynamically adjusted with a programmable *** of these elements can effectively reflect a phase-shifted version of the incident electromagnetic wave. By configuring the wave phases in real time, the propagation environment of the information-bearing signals can be dynamically manipulated to enhance communication reliability, boost transmission rate, expand cellular coverage, and strengthen communication security. In this study, we provide an overview on RIS-assisted wireless communications. Specifically, we elaborate on the state-of-the-art enabling techniques for the RIS technology as well as their corresponding substantial benefits from the perspectives of RIS reflection and RIS modulation. With these benefits, we envision the integration of RISs into emerging applications for6G. In addition, communication security is of unprecedented importance in future 6G networks with ubiquitous wireless services in multifarious verticals and areas. We highlight potential contributions of RISs to physical-layer security, in terms of secrecy rate and secrecy outage probability, exemplified by a typical case study from both theoretical and numerical aspects. Finally, we discuss challenges and opportunities on the deployment of RISs in practice to motivate future research.

关键词： reconfigurable intelligent surface physical-layer security RIS-assisted wireless communications phase modulation 6G

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Editorial

Intelligent and Converged Networks 2022年第1期3卷 I0001-I0003页

作者： Linglong Dai Chan-Byoung Chae Shi Jin marco di renzo Rui Zhang Beijing National Research Center for Information Science and Technology(BNRist)and the Department of Electronic Engineering Tsinghua UniversityBeijing 100084China School of Integrated Technology Yonsei Institute of Convergence TechnologyYonsei UniversityIncheon 406-840Republic of Korea. National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China. the UniversitéParis-Saclay CNRSCentraleSupélecLaboratoire des Signaux et Systèmes3 Rue Joliot-Curie91192 Gif-sur-YvetteFrance. Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore

Reconfigurable Intelligent Surface(RIS),also known as intelligent reflecting surface or large intelligent surface,is an emerging new physical-layer technology in the field of wireless *** basic idea of RIS is to deploy a reconfigurable passive array in the environment to manipulate the propagation of electron-magnetic *** promises a new design paradigm for wireless communications,where the wireless propagation environment can be dynamically controlled,which is substantially different from the conventional design that focuses only on the transmitter and *** RIS-aided wireless communications,some of the current methodologies in conventional communication systems need to be revised,and some novel solutions are required to realize the potential benefits of the *** the number of publications about RIS has recently sharply increased,there are still many challenging issues to be extensively investigated,such as the RIS channel modeling,fundamental performance limits,the system design,joint optimization of the RIS and the transceivers,channel state information acquisition,and interdisciplinary applications.

关键词： passive sharply revised

Validation of fluid-particle interaction force relationships in binary-solid suspensions

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Particuology 2015年第6期13卷 40-48页

作者： marco Rotondi renzo di Felice Paolo Pagliai Department of Civil Chemical and Environmental Engneering University of Genova Via Opera Pia 15 16145 Genova Italy

In this work several relationships governing solid-fluid dynamic interaction forces were validated against experimental data for a single particle settling in a suspension of other smaller particles. It was observed that force relationships based on Lattice-Boltzmann simulations did not perform as well as other inter- action types tested. Nonetheless, it is apparent that, in the case of a suspension of different particle types, it is important that the correct choice is made as to how the contribution to the overall fluid-particle interaction force is split between buoyancy and drag. Experimental evidence clearly suggests that the ＂generalized＂ Archimedes＇ principle （where the foreign particle is considered to displace the whole suspension and not just the fluid） provides the best result.

关键词： Solid-fluid suspensionsSolid-fluid interaction forcesDrag forceBuoyancy force

Sparsity Modulation for 6G Communications

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China Communications 2023年第10期 6-9页

作者： Jun Li Shuping Dang Jia Hou marco di renzo Mohamed-Slim Alouini

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Editorial:Special Topic on Reconfigurable Intelligent Surface(RIS)

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ZTE Communications 2022年第1期20卷 1-2页

作者： YUAN Yifei JIN Shi marco di renzo China Mobile Research Institute the National Mobile Communications Research Laboratory Southeast University the French National Center for Scientific Research(CNRS) the Laboratory of Signals and Systems(L2S)of Paris-Sac lay University-CNRS Paris-Saclay University IEEE the UK Institution of Engineering and Technology(IET) the Asia-Pacific Artificial Intelligence Association(AAIA) the European Academy of Sciences and Arts(EASA) the Academy of Europe(AE)

Over the past two years,reconfigurable intelligent surface(RIS),as a promising emerging technology for Beyond 5 G(B5 G) and 6 G mobile communications systems,has attracted enormous interest from both academia and indu... 详细信息

关键词： Alcatel IoT Engine

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A new evaluation system for early and successful conservative treatment for acute ischial tuberosity avulsion

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Chinese Journal of Traumatology 2013年第4期16卷 254-256页

作者： marco Ceretti Sara di renzo Department of Orthopaedics and Traumatology Sapienza University of Rome Rome 00185 Italy

在这份报告，我们分析 ischiatic 有块茎撕裂的一个案例。来到了我们的急救部门的一个 15 岁的病人在一个足球比赛事故以后的二天保存地被对待并且在月 1-4 检验了， 6 和 12。以便检验耐心的状况，一个新索引被提出：无能分数索引(ISI... 详细信息

在这份报告，我们分析 ischiatic 有块茎撕裂的一个案例。来到了我们的急救部门的一个 15 岁的病人在一个足球比赛事故以后的二天保存地被对待并且在月 1-4 检验了， 6 和 12。以便检验耐心的状况，一个新索引被提出：无能分数索引(ISI ) 为休息基于运动和规模的新潮的范围，运用走的、疼痛并且与象水肿区域那样的另外的参数相比， X 光检查和 CT 因此评估的碎片脱离。ISI 把无能定义为严重、中等、温和。它以正确方法指导使复权程序。在这种情况中，病人能轻柔地追赶 35 天并且在 4 个月以后回到完整的收缩筋活动。在治疗的结束，病人指了完全的疼痛宽恕，运动恢复的完整的范围和好骨折巩固。在 1 年以后，我们关于使用的治疗学的策略和获得的结果讨论。

关键词：保守治疗评价体系结节急性足球比赛活动范围 ISI 分指数

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Effects of realistic reradiation models in digital reconfigurable intelligent surfaces

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Journal of Information and Intelligence 2023年第3期1卷 238-252页

作者： marco di renzo Abdelhamed Mohamed Alessio Zappone Gabriele Gradoni marco Rossi Massimo Moccia Giuseppe Castaldi Vincenzo Galdi Universite Paris-Saclay CNRSCentraleSupelecLaboratoire des Signaux et Systemes3 Rue Joliot-CurieGif-sur-Yvette 91192France University of Cassino and Lazio Meridionale Department of Electrical and Information EngineeringVia Gaetano Di Biasio 43Cassino(FR)03043Italy University of Nottingham School of Mathematical Sciences and Department of Electrical and Electronics EngineeringUniversity ParkNottingham NG72RDUK dUniversity of Cambridge Department of Computer Science and Technology15 J.J.Thomson AvenueCambridge CB30FDUK University of Sannio Department of EngineeringCorso Garibaldi 107Benevento 82100Italy

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.

关键词： Wireless communications Reconfigurable intelligent surfaces Dynamic metasurfaces Modeling Performance evaluation Optimization

Reconfigurable intelligent surfaces for smart wireless environments: channel estimation, system design and applications in 6G networks

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Science China(Information Sciences) 2021年第10期64卷 52-72页

作者： Ying-Chang LIANG Jie CHEN Ruizhe LONG Zhen-Qing HE Xianqi LIN Chenlu HUANG Shilin LIU Xuemin (Sherman) SHEN marco di renzo Center for Intelligent Networking and Communications University of Electronic Science and Technology of China School of Electronic Science and Engineering University of Electronic Science and Technology of China Department of Electrical and Computer Engineering University of Waterloo Université Paris-Saclay CNRS CentraleSupélec Laboratoire des Signaux et Systèmes

Reconfigurable intelligent surface(RIS), one of the key enablers for the sixth-generation(6G)mobile communication networks, is considered by designers to smartly reconfigure the wireless propagation environment in a controllable and programmable manner. Specifically, an RIS consists of a large number of low-cost and passive reflective elements(REs) without radio frequency chains. The system gain of RIS wireless systems can be achieved by adjusting the phase shifts and amplitudes of the REs so that the desired signals can be added constructively at the receiver. However, an RIS typically has limited signal processing capability and cannot perform active transmitting/receiving in general, which leads to new challenges in the physical layer design of RIS wireless systems. In this paper, we provide an overview of the RIS-aided wireless systems, including the reflection principle, channel estimation, and system design. In particular,two types of emerging RIS systems are considered: RIS-aided wireless communications(RAWC) and RISbased information transmission(RBIT), where the RIS plays the role of the reflector and the transmitter,respectively. We also envision the potential applications of RIS in 6G networks.

关键词： reconfigurable intelligent surface channel estimation RIS-aided wireless communications RIS-based information transmission 6G