Results 51 to 60 of about 449 (157)

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

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

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

Design of Optical Wireless Communication (OWC) Systems for High-Capacity Data Transmission

Optical Wireless Communication (OWC) is a cutting-edge technology that utilizes light to transmit data without the need for physical cables. OWC includes technologies such as Visible Light Communication (VLC), Infrared Communication (IRC), and Free-Space Optical (FSO) communication.
Shivashankar, Madhumathy P, Hareesh Kumar   +2 more
openaire   +2 more sources

Optical Wireless Data and Power Transfer for In‐Body Electronic Devices: A Proof‐of‐Concept Study Using Ex Vivo Porcine Samples

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
The proposed system architecture of joint data and power transfer based on optical technology to in‐body electronics devices. ABSTRACT This study presents a proof‐of‐concept system for the joint wireless transfer of data and power to in‐body electronic devices (IEDs) using near‐infrared (NIR) light technology. The proposed system addresses two critical
Syifaul Fuada, Mariella Särestöniemi, Marcos Katz   +2 more
wiley   +1 more source

Optical Wireless Communications: Illuminating the Path for Cooper’s Law

IEEE Open Journal of the Communications Society
The increasing proliferation of internet-connected devices, together with the widespread reliance on wireless communication in daily activities, are limiting the capabilities of the radio frequency (RF) spectrum to meet data traffic demands.
Mahmoud Wafik Eltokhey, Muhammad Salman Bashir, Othman Isam Younus, Zabih Ghassemlooy, Harald Haas, George K. Karagiannidis, Shivani Rajendra Teli, Stanislav Zvanovec, Mohammad-Ali Khalighi, Zhenyu Charlus Zhang, Steve Hranilovic, Maite Brandt-Pearce, Jean-Paul Linnartz, Abderrahmen Trichili, Hyunchae Chun, Dominic O'Brien, Murat Uysal, Jian Song, Murat Yuksel, Hany Elgala, Zhengyuan Xu, Nan Chi, Takaya Yamazato, Chi-Wai Chow, Boon S. Ooi, Mohamed-Slim Alouini   +25 more
doaj   +1 more source

Deep Learning Based Design of Binary Signalling for Optical Wireless Communication Systems With 2D Receiver

IET Optoelectronics, Volume 19, Issue 1, January/December 2025.
We apply a deep learning (DL) technique to binary signalling design for optical wireless communication (OWC) system with a 2D LED transmitter array and an arrayed 2D receiver. It is demonstrated that the DL‐based signalling design algorithm is feasible for OWC system, considering physical channel effect. ABSTRACT Recently, deep learning (DL) techniques
Yongwoon Hwang, Chung Ghiu Lee, Soeun Kim   +2 more
wiley   +1 more source