Results 41 to 50 of about 6,983 (148)

A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness

IEEE Access, 2021
In this study, we consider the downlink beamforming problem in millimeter wave (mmWave) systems subjected to both path blockages and imperfect channel state information (CSI), and propose a new robust hybrid sum-outage minimizing design as a solution. We
Hiroki Iimori, Giuseppe Thadeu Freitas De Abreu, Omid Taghizadeh, Razvan-Andrei Stoica, Takanori Hara, Koji Ishibashi   +5 more
doaj   +1 more source

Discovering Interpretable Semantics from Radio Signals for Contactless Cardiac Monitoring

Advanced Science, EarlyView.
This study presents a semantic representation framework for clinically interpretable cardiac monitoring from contactless radio signals. It formulates radio semantic learning as an information‐bottleneck problem and approximates the objective via intra‐modal compression and cross‐modal alignment, structuring radio measurements into meaningful semantic ...
Jinbo Chen, Haoyu Wang, Guixin Xu, Yuqin Yuan, Xinmeng Cai, Zhengwu Wei, Dongheng Zhang, Qibin Sun, Tianwei Zhang, Cuntai Guan, Yan Chen   +10 more
wiley   +1 more source

Generic Multiuser Coordinated Beamforming for Underlay Spectrum Sharing

, 2015
The beamforming techniques have been recently studied as possible enablers for underlay spectrum sharing. The existing beamforming techniques have several common limitations: they are usually system model specific, cannot operate with arbitrary number of
Atanasovski, Vladimir, Denkovski, Daniel, Gavrilovska, Liljana, Mähönen, Petri, Rakovic, Valentin   +4 more
core   +1 more source

Distributed coordinated beamforming for multi-cell multigroup multicast systems [PDF]

2016 IEEE International Conference on Communications (ICC), 2016
This paper considers coordinated multicast beamforming in a multi-cell wireless network. Each multiantenna base station (BS) serves multiple groups of single antenna users by generating a single beam with common data per group. The aim is to minimize the sum power of BSs while satisfying user-specific SINR targets.
Pennanen, Harri, Christopoulos, Dimitrios, Chatzinotas, Symeon, Ottersten, Bjorn   +3 more
openaire   +3 more sources

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Spatial blanking method for massive MIMO-FBMC system

上海师范大学学报. 自然科学版, 2017
In this paper,we study the downlink performance of MIMO-FBMC system where small cells are deployed under a macrocell,both macro and small cells share the same spectrum.Assume the regime of massive MIMO in the macrocell,the users of the same hotspot are ...
Wang Jia'nan, Zhou Xiaoping, Li Li, Xiang Haokai, Wang Bin   +4 more
doaj   +1 more source

CB‐REFIM: a practical coordinated beamforming in multicell networks [PDF]

IET Communications, 2014
Performance of multicell systems is inevitably limited by interference and available resources. Although intercell interference can be mitigated by base station (BS) coordination, the demand on inter‐BS information exchange and computational complexity grows rapidly with the number of cells, subcarriers and users.
Mohammad Hossein Akbari, Vahid Tabataba Vakili   +1 more
openaire   +2 more sources

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source

Robust Secrecy Energy Efficiency Optimization for Wireless Powered Heterogeneous Networks Using Distributed ADMM Algorithm

IEEE Access, 2019
Under the case of imperfect channel state information (CSI), this paper investigates the robust secrecy energy efficiency (SEE) optimization for the heterogeneous networks (HeNets) supported by simultaneous wireless information and power transfer ...
Bo Zhang, Bin Li, Kaizhi Huang, Zhou Zhong, Lijian Zhang, Zesong Fei   +5 more
doaj   +1 more source

Coordinated regularized zero-forcing beamforming with channel statistics based adaptive feedback for cooperative massive MIMO networks

ICT Express, 2021
In cooperative massive multiple-input multiple-output (MIMO) networks, channel statistics based adaptive feedback can considerably reduce feedback overhead for channel state information (CSI) acquisition as well as backhaul overhead for CSI sharing. When
Jinho Kang, Wan Choi
doaj   +1 more source