Results 71 to 80 of about 5,091,880 (125)

Integrated sensing and communication in reconfigurable intelligent surface systems: status, design and outlook

Dianxin kexue, 2022
Integrated sensing and communication (ISAC) is the dominant trend of the sixth generation mobile communication networks (6G).The introduction of ISAC into the reconfigurable intelligent surface (RIS) system can expand the system coverage, improve both ...
Xiaoling HU, Zhouyuan YU, Xiaowei QIAN, Mugen PENG   +3 more
doaj   +2 more sources

Overcoming the Phase Discontinuity Problem in RIS Optimization: A Robust and Scalable Phase‐Aware Deep Regression Framework via Hybrid CNN–LSTM Architecture

Advanced Intelligent Systems, Volume 8, Issue 9, September 2026.
The phase discontinuity problem—where the cyclic nature of phase angles causes catastrophic errors near the ±π boundary—is a fundamental obstacle in learning‐based reconfigurable intelligent surface (RIS) optimization. A phase‐aware hybrid CNN–LSTM framework resolves this by decomposing phase predictions into sine–cosine components, mapping circular ...
Seda Savaşçı Şen, Ali Çalhan, Murtaza Cicioğlu, Oğuzhan Demiryürek   +3 more
wiley   +1 more source

Optimal Placement of Reconfigurable Intelligent Surfaces (RIS) for Wireless Systems

, 2022
Reconfigurable Intelligent Surfaces (RIS) have been proposed to reconfigure the wireless propagation environment and enhance transmission performance. A RIS is made of passive reconfigurable elements and can vary the phase and amplitude of the incident ...
Abalroos, Mohammed
core  

RIS-assisted UAV communications: A review of system models, frameworks and outage performance

ICT Express
Integration of Reconfigurable Intelligent Surfaces (RIS) with Unmanned Aerial Vehicles (UAVs) generates a revolutionary paradigm for next-generation wireless communications, particularly in IoT and 6G applications.
Saddaf Rubab, Ghulam E Mustafa Abro, Hifza Mustafa, Saad Khan Baloch, Sufyan Ali Memon, Nasir Saeed   +5 more
doaj   +1 more source

Decoupling Backward Scattering Control and Forward Beamformed Communication in a Shared‐Aperture Retro‐Reflective/Transmissive Metasurface

Nanophotonics, Volume 15, Issue 15, 13 August 2026.
Conceptual illustration of the retro‐reflective and transmissive metasurface (RRTM). The blue radar establishes communication with the UAV via the transmissive mode, whereas the purple surveillance radar acquires the status of friendly units through the retro‐reflective mode and the two modes operate simultaneously within the same decoupled aperture ...
Shulei Zhang, Ruichao Zhu, Yuxiang Jia, Fan Wu, Xinqi Cai, Zhihui Zhang, Dan Liu, Yuxiao Guo, Jiafu Wang   +8 more
wiley   +1 more source

Enhanced Physical Layer Secret Key Generation via Beyond-Diagonal Reconfigurable Intelligent Surfaces in Multi-User MIMO Systems

Journal of Engineering
Physical Layer Key Generation (PLKG) provides a promising approach for establishing secure cryptographic keys between legitimate parties. However, in static and quasi-static environments, the key generation rate is significantly limited due to the low ...
Mina Fadhil Hasan, Aqiel Niama Almamori
doaj   +1 more source

Reconfigurable Intelligent Surface Assisted Semantic Communication Systems

, 2023
Semantic communication, which focuses on conveying the meaning of information rather than exact bit reconstruction, has gained considerable attention in recent years.
Pan, Haoyuan, Lok, Tat-Ming, Shi, Jiajia, Chan, Tse-Tin   +3 more
core   +1 more source

RIS partitioning and UAV selection for age-of-information optimization in RIS-assisted UAV communications

ICT Express
Reconfigurable intelligent surface (RIS) has been attracted great attention because it can enhance the capacity and coverage of wireless communication systems.
Juseoung Lee, Jaewoo So
doaj   +1 more source

Performance of Joint Symbol Level Precoding and RIS Phase Shift Design in the Finite Block Length Regime with Constellation Rotation

, 2023
peer reviewedIn this paper, we tackle the problem of joint symbol level precoding (SLP) and reconfigurable intelligent surface (RIS) phase shift design with constellation rotation in the finite block length regime. We aim to increase energy efficiency
OTTERSTEN, Björn, Martins, Wallace A., AL-HRAISHAWI, Hayder, CHATZINOTAS, Symeon, ZIVUKU, Progress, KISSELEFF, Steven   +5 more
core   +1 more source

Impact of a transmitting-RIS on the geometrical structure of indoor mmWave channels

, 2022
International audienceIn this paper we investigate the impact of the use of Transmitting Reconfigurable Intelligent Surfaces (T-RISs) on the indoor millimeter wave (mmWave) radio channel characteristics.
Mudonhi, Alfred, Clemente, Antonio, d'Errico, Raffaele, Lotti, Marina, Oestges, Claude   +4 more
core   +1 more source