Results 41 to 50 of about 1,668 (208)

Sum Rate Maximization through Intelligent Reflecting Surface Element Allocation

, 2021
지능형 반사 표면 (Intelligent reflecting surface, IRS)은 차세대 무선통신을 이끌 신기술의 후보로 각광받고 있다. 본 논문에서는, IRS의 소자 할당이라는 신개념을 이용하여 다중 유저 다운 링크 상황에서 하나의 IRS를 사용한 교대 빔포밍 기법을 제안하였다.
최준일, 조혜상
core   +1 more source

Intelligent Reflecting Surface Assisted NOMA with Heterogeneous Internal Secrecy Requirements

, 2021
The intelligent reflecting surface (IRS) technology can significantly enhance the flexibility of non-orthogonal multiple access (NOMA) by reconfiguring the channel gains according to the users' communication requirements. We propose to use IRS to enhance
Tao, Xiaofeng, Li, Meng, Liu, Yuanwei, Li, Na, Yuan, Chaoying   +4 more
core   +1 more source

Hybrid automatic repeat request‐based intelligent reflecting surface‐assisted communication system

Electronics Letters, 2021
The intelligent reflecting surface (IRS) is an emerging technique to extend wireless coverage. In this letter, the performance of the hybrid automatic repeat request (hybrid ARQ) for an IRS‐assisted system is analysed.
Yun Ai, Marshed Mohamed, Long Kong, Ahmed Al‐Saman, Michael Cheffena   +4 more
doaj   +1 more source

Computationally efficient phase control algorithm for intelligent reflecting surface-aided multiuser systems

ICT Express, 2023
The intelligent reflecting surface (IRS) technology can enhance coverage in wireless networks by detouring a blocked path, where the phases of its passive elements are controlled to reinforce reflected signals in the desired directions, as the massive ...
Gwang Hae Kim, Duk Kyung Kim
doaj   +1 more source

PPO-based deployment and phase control for movable intelligent reflecting surface

Journal of Cloud Computing: Advances, Systems and Applications, 2023
Intelligent reflecting surface (IRS) stands as a promising technology to revolutionize wireless communication by manipulating incident signal amplitudes and phases to enhance system performance. While existing research primarily centers around optimizing
Yikun Zhao, Fanqin Zhou, Huaide Liu, Lei Feng, Wenjing Li   +4 more
doaj   +1 more source

Multipath Fading Channel Modeling with Aerial Intelligent Reflecting Surface

, 2021
Different from the traditional terrestrial intelligent reflecting surface (IRS), aerial IRS (AIRS) can provide some unique advantages, such as flexible deployment and wider-view signal reflection.
Wei Fan, Zhangdui Zhong, Changzhu Liu, Ruisi He, Yang , Mi, Fan, Wei, Ai, Bo, Bo Ai, Liu, Changzhu, He , Ruisi, Zhong, Zhangdui, Zhangfeng Ma, Wang , Ning, Ma, Zhangfeng, Mi Yang, Ning Wang   +15 more
core   +1 more source

Advancing Lithium–Oxygen Batteries: Pioneering Cathode Catalyst Innovation and Artificial Intelligence‐Driven Design Paradigms

Advanced Materials, EarlyView.
This review summarizes the principles and challenges of nonaqueous lithium‐oxygen batteries and recent advances in cathode catalysts, including carbon‐based materials, metals, oxides, sulfides, nitrides, carbides, and redox mediators. It highlights emerging design strategies and artificial intelligence‐driven approaches, emphasizing data‐assisted ...
Yuqing Yao, Chongyang Hao, Karol Viviana Mejia‐Centeno, Malik Dilshad Khan, Shang Wang, Longqiu Li, Yanhong Tian, Andreu Cabot, Qing Sun   +8 more
wiley   +1 more source

Design scheme of physical layer security for intelligent reflecting surface-assisted MISO communication system

Tongxin xuebao, 2022
Intelligent reflecting surface (IRS) improves the physical layer security of the communication systems by adjusting the phases of the reflecting units.A scheme of physical layer security design based on alternative iteration was proposed for IRS-assisted
Xiaorong JING, Zhenyuan SONG, Wei GAO, Weijia LEI, Qianbin CHEN   +4 more
doaj   +2 more sources

Multi‐Omics Profiling Reveals Immunomodulatory and Pro‐Regenerative Effects of a Graphene Oxide–Collagen Scaffold in Massive Rotator Cuff Tears

Advanced Science, EarlyView.
A graphene oxide/collagen scaffold is developed for chronic massive rotator cuff tear repair. The scaffold improves compressive stability, supports reparative mesenchymal differentiation, and modulates the immune microenvironment. In chronic MRCT models, it reduces muscle degeneration, enhances tendon–bone regeneration, and improves functional recovery,
Renwen Wan, Yechuan Deng, Zixin Hu, Yanwei He, Xinting Feng, Jun Ma, Yisheng Chen, Zhijie Zhao, Jie Mei, Zhiheng Lin, Wei Luo, Zhengyuan Fang, Zhufeng Hu, Kunlun Feng, Xinrong Li, Dan Wu, Bowen Han, James Hoi po Hui, Xuanyong Liu, Chen Chen, Gang Chen, Shiyi Chen, Nirong Bao, Jiajun Qiu, Zhiwen Luo   +24 more
wiley   +1 more source

Energy Efficient Intelligent Reflecting Surface Assisted Terahertz Communications

, 2021
This paper investigates the energy efficiency optimisation problem for an intelligent reflecting surface (IRS) assisted Terahertz communication system.
Chongwen Huang, Huang, Chongwen, Chau, Yuen, Yang, Zhaohui, Wu, Qirui, Shikh-Bahaei, Mohammad; id_orcid, Yirun Zhang, Yuen Chau, Qirui Wu, Zhaohui Yang, Mohammad Shikh-Bahaei, Zhang, Yirun   +11 more
core   +1 more source