Results 61 to 70 of about 7,066,020 (125)

Indoor gigabit optical wireless communications: challenges and possibilities [PDF]

, 2010
Indoor Gigabit optical wireless communication systems have the potential to offer multiple high-speed data services that can be delivered to homes via an optical fibre cable in the near future. In this paper we will discuss the challenges involved in the
Ghassemlooy, Zabih, Dominic O'Brien, Grahame Faulkner, Ghassemlooy, Z, Faulkner, G, O'Brien, Dominic, Faulkner, Grahame, Le Minh, H, Zabih Ghassemlooy, Le Minh, Hoa, O'Brien, D, Hoa Le Minh   +11 more
core   +1 more source

QCL‐Based Cryogen‐Free THz Optical Wireless Communication Link

Laser &Photonics Reviews, Volume 19, Issue 6, March 18, 2025.
A novel QCL‐based, cryogen‐free, and transportable wireless communication system is presented operating at 2.83 THz. The QCL device is mounted in a compact Stirling refrigerator, while a room‐temperature graphene‐based FET is used as a receiver, implementing a binary on‐off keying (OOK) modulation scheme with Manchester encoding.
Alessia Sorgi, Marco Meucci, Muhammad A. Umair, Francesco Cappelli, Guido Toci, Paolo De Natale, Leonardo Viti, Andrea C. Ferrari, Miriam S. Vitiello, Luigi Consolino, Jacopo Catani   +10 more
wiley   +1 more source

Crosstalk-mitigated AWGR-based two-dimensional IR beam-steered indoor optical wireless communication system with a high spatial resolution [PDF]

, 2019
In this paper, a crosstalk-mitigated transmission scheme in arrayed waveguide grating router (AWGR) based two dimensional infrared beam-steered optical wireless communication (OWC) system is proposed for indoor applications.
Cao, Zizheng, Tangdiongga, Eduward, Liu, Yu, Tangdiongga, Eduward; id_orcid, Jiao, Yuqing, Li, Chao, Zhang, Xuebing, Koonen, Ton   +7 more
core   +3 more sources

An IoT-Enabled Deep Learning-Based MIMO-OFDM Scheme for Optical Camera Communication in Mobile Environments

Photonics
This study proposes Multiple-Input Multiple-Output and Orthogonal Frequency-Division Multiplexing methods, as introduced in the IEEE 802.15.7a-2024 standard, to achieve higher data rates and longer transmission ranges in OCC systems where a camera is ...
Van Khoa Pham, Huy Nguyen
doaj   +1 more source

Multiple Narrowband Bidirectional Self‐Powered Organic Photodetector with Fast Response

Laser &Photonics Reviews, Volume 19, Issue 1, January 8, 2025.
Organic photodetectors(OPDs) with multiband, fast response are presented. These devices exhibit incidence direction‐dependent, narrow‐band spectral response from UV to NIR. Notably, their bandwidth surpasses 300 kHz, the fastest among same type devices reported to knowledge.
Yuxin Xia, Dimitra G. Georgiadou
wiley   +1 more source

Physical layer security in satellite communication: State‐of‐the‐art and open problems

IET Communications, Volume 19, Issue 1, January/December 2025.
This paper first classifies contemporary satellite communication networks into five domains and then analyse the use of PLS in each domain; these domains are hybrid satellite‐terrestrial networks, satellite‐based IoT, navigation satellite systems, FSO‐based satellites, and inter‐satellite communications.
Nora Abdelsalam, Saif Al‐Kuwari, Aiman Erbad   +2 more
wiley   +1 more source

Ultra-high-capacity wireless communication by means of steered narrow optical beams [PDF]

, 2020
\u3cp\u3eThe optical spectrum offers great opportunities to resolve the congestion in radio-based communication, aggravated by the booming demand for wireless connectivity.
Cao, Zizheng, Huijskens, Frans M., Tangdiongga, Eduward, Pham, Ngoc, Tangdiongga, E Eduward, Koonen, AMJ Ton, Mekonnen, KA Ketemaw, Tangdiongga, Eduward; id_orcid, Cao, Z Zizheng, Huijskens, Frans M, Mekonnen, Ketemaw A., Koonen, A.M.J. (Ton)   +11 more
core   +3 more sources

Robust Connectivity in 6G Enabled Indoor VLC Networks Using Intelligent Reflecting Surfaces

IET Communications, Volume 19, Issue 1, January/December 2025.
Visible light communication (VLC) in 6G optical networks offers high data rates with extended network coverage. The challenge is that these VLC networks are susceptible to signal obstructions that lower line‐of‐sight (LoS) link quality. This paper proposes a novel framework that uses Intelligent reflecting surfaces, which provide improved non‐LoS ...
Ali Alqahtani, Ashu Taneja, Nayef Alqahtani   +2 more
wiley   +1 more source

CNN‐Based Human Detection and Identification in Indoor Optical Camera Communication Systems Using a Wearable LED Strip

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
In this paper, we present an optical camera communication (OCC) system utilising a deep learning for indoor communication and monitoring with wearable LED strips and cameras. Specifically, we employ the YOLOv8 object detection model, based on convolutional neural networks (CNNs), to reliably detect a yellow safety jacket equipped with an LED strip in ...
Eleni Niarchou, Atiya Fatima Usmani, Vicente Matus, Jose Rabadan, Victor Guerra, Luis Nero Alves, Rafael Perez‐Jimenez   +6 more
wiley   +1 more source

Experimental Research on Image Transmission Over One Hundred Metres With Limited Bandwidth in a Semantic Ultraviolet Communication System

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
In order to measure the impact of interference light signals and the noise from optoelectronic devices on the signal‐to‐noise ratio, we proposed and built an experimental digital SUC system, as shown in the figure below. ABSTRACT Currently, ultraviolet (UV) communication is proposed for use in unmanned aerial vehicle (UAV) communication, while the ...
Qibin Xu, Xukun Chen, Dahai Han, Min Zhang   +3 more
wiley   +1 more source