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In recent years, orthogonal chirp-division multiplexing (OCDM) has been increasingly considered as an alternative multicarrier scheme, e.g., to orthogonal frequency-division multiplexing, in digital communication applications. Among reasons…

Intelligent reflecting surface (IRS) is envisioned as a revolutionary technology for future wireless communication systems since it can intelligently change radio environment and integrate it into wireless communication optimization.…

Signal Processing · Electrical Eng. & Systems 2021-01-05 Hongyu Li , Wenhao Cai , Yang Liu , Ming Li , Qian Liu , Qingqing Wu

One key metric for physical layer security is the secrecy capacity. This is the maximum rate that a system can transmit with perfect secrecy. For a Multiple Input Multiple Output (MIMO) system (a newer technology for 5G, 6G and beyond) the…

Information Theory · Computer Science 2022-10-03 Jennifer Chakravarty , Oliver Johnson , Robert Piechocki

Intelligent reflecting surfaces (IRS) can improve the physical layer security (PLS) by providing a controllable wireless environment. In this paper, we propose a novel PLS technique with the help of IRS implemented by an intelligent mirror…

Information Theory · Computer Science 2021-02-01 Lei Qian , Xuefen Chi , Linlin Zhao , Anas Chaaban

The synergy between integrated sensing and communication (ISAC) and reconfigurable intelligent surfaces (RISs) unlocks novel applications and advanced services for next-generation wireless networks, yet also introduces new security…

Signal Processing · Electrical Eng. & Systems 2026-03-26 Zehra Yigit , Sefa Kayraklik , Ertugrul Basar , Ali Gorcin

This paper investigates an intelligent reflective surface (IRS) assisted secure multi-user two-way communication system. The aim of this paper is to enhance the physical layer security by optimizing the minimum secrecy-rate among all…

Information Theory · Computer Science 2025-01-27 Harindu Jayarathne , Tharindu Wickremasinghe , Kasun T. Hemachandra , Tharaka Samarasinghe , Saman Atapattu

The idea of Integrated Sensing and Communication (ISAC) offers a promising solution to the problem of spectrum congestion in future wireless networks. This paper studies the integration of intelligent reflective surfaces (IRS) with ISAC…

Signal Processing · Electrical Eng. & Systems 2023-09-06 Mahmoud AlaaEldin , Emad Alsusa , Karim G. Seddik , Christos Masouros , Iman Valiulahi

This paper investigates secure Directional Modulation (DM) design enhanced by a rotatable active Reconfigurable Intelligent Surface (RIS). In conventional RIS-assisted DM networks, the security performance gain is limited due to the…

Signal Processing · Electrical Eng. & Systems 2026-03-24 Yongqiang Li , Feng Shu , Shaofan Chen , Yuanyuan Wu , Maolin Li , Zhen Chen , Hao Jiang , Jiangzhou Wang

This paper considers a secure multigroup multicast multiple-input single-output (MISO) communication system aided by an intelligent reflecting surface (IRS). Specifically, we aim to minimize the transmit power at the Alice via jointly…

Signal Processing · Electrical Eng. & Systems 2020-08-18 Weiping Shi , Jiayu Li , Guiyang Xia , Yuntian Wang , Xiaobo Zhou , Yonghui Zhang , Feng Shu

This paper investigates physical layer security (PLS) in the intelligent reflecting surface (IRS)-assisted multiple-user uplink channel. Since the instantaneous eavesdropper's channel state information (CSI) is unavailable, the secrecy rate…

Information Theory · Computer Science 2022-05-24 Xiangrui Cheng , Yiliang Liu , Zhou Su , Wei Wang

Integrated sensing and communication (ISAC) has been receiving a notable interest as an energy- and spectrum-efficient enabler for simultaneous communication and sensing. Notably, reconfigurable intelligent surfaces (RIS) is among the key…

Information Theory · Computer Science 2026-04-07 Elmehdi Illi , Marwa Qaraqe

In the intelligent reflecting surface (IRS)-enhanced wireless communication system, channel state information (CSI) is of paramount importance for achieving the passive beamforming gain of IRS, which, however, is a practically challenging…

Information Theory · Computer Science 2020-01-30 Beixiong Zheng , Rui Zhang

Although multi-access edge computing (MEC) has allowed for computation offloading at the network edge, weak wireless signals in the radio access network caused by obstacles and high network load are still preventing efficient edge…

Signal Processing · Electrical Eng. & Systems 2023-12-15 Elie El Haber , Mohamed Elhattab , Chadi Assi , Sanaa Sharafeddine , Kim Khoa Nguyen

Compared with traditional half-duplex wireless systems, the application of emerging full-duplex (FD) technology can potentially double the system capacity theoretically. However, conventional techniques for suppressing self-interference…

Information Theory · Computer Science 2023-06-27 Chi Qiu , Meng Hua , Qingqing Wu , Wen Chen , Shaodan Ma , Fen Hou , Derrick Wing Kwan Ng , A. Lee Swindlehurst

This letter investigates physical layer security in intelligent reflecting surface (IRS)-aided visible light communication (VLC). Under the point source assumption, we first elaborate the system model in the scenario with multiple…

Information Theory · Computer Science 2022-01-04 Shiyuan Sun , Fang Yang , Jian Song , Zhu Han

This paper analyses the security performance of a reconfigurable intelligent surface (RIS)-aided unmanned aerial vehicle (UAV) communication system with integrated sensing and communications (ISAC). We consider a multiple-antenna UAV…

Signal Processing · Electrical Eng. & Systems 2024-09-26 Yue Xiu , Wanting Lyu , Phee Lep Yeoh , Yonghui Li , Yi Ai , Ning Wei

In this paper, we investigate the power allocation of primary base station (PBS) and cognitive base station (CBS) across different orthogonal frequency division multiplexing (OFDM) subcarriers for energy-efficient secure downlink…

Information Theory · Computer Science 2018-10-12 Yuhan Jiang , Yulong Zou , Jian Ouyang , Jia Zhu

Electromagnetic wave absorbing material (EWAM) plays an essential role in manufacturing stealth aircraft, which can achieve the electromagnetic stealth (ES) by reducing the strength of the signal reflected back to the radar system. However,…

Signal Processing · Electrical Eng. & Systems 2024-03-20 Xue Xiong , Beixiong Zheng , A. Lee Swindlehurst , Jie Tang , Wen Wu

This work peruses a simultaneous transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) based wireless system wherein untrusted energy harvesting nodes wiretap the legitimate signal. The achievable secrecy rate and the…

Information Theory · Computer Science 2022-10-18 Mohammad Reza Kavianinia , Mohammad Javad Emadi

This paper considers the secrecy performance of several schemes for multi-antenna transmission to single-antenna users with full-duplex (FD) capability against randomly distributed single-antenna eavesdroppers (EDs). These schemes and…

Information Theory · Computer Science 2025-07-21 Ishmam Zabir , Ahmed Maksud , Gaojie Chen , Brian M. Sadler , Yingbo Hua
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