Results 71 to 80 of about 231,801 (304)

LED Half-Power Angle Optimization for Ultra-Dense Indoor Visible Light Communication Network Deployment

IEEE Open Journal of the Communications Society, 2020
Due to limited interference range, the advantage of visible light communication (VLC) over wireless fidelity (WiFi) lies more in the unit-area transmission rate rather than the single-link transmission rate.
Jiaojiao Xu, Chen Gong, Jianghua Luo, Zhengyuan Xu   +3 more
doaj   +1 more source

Space-division multiplexing for fiber-wireless communications

, 2018
We envision the application of optical Space-division Multiplexing (SDM) to the next generation fiber-wireless communications as a firm candidate to increase the end user capacity and provide adaptive radiofrequency-photonic interfaces.
Barrera, David, Garcia, Sergi, Gasulla, Ivana, Hervas, Javier, Sales, Salvador   +4 more
core   +1 more source

A study of discrete wavelet transform based denoising to reduce the effect of artificial light interferences for indoor optical wireless communication [PDF]

, 2010
The optical power penalty (OPP) due to the artificial light interferences (ALIs) can be significantly high in an indoor optical wireless communication (OWC) channel making such link practically infeasible.
Angelova, Maia, Ghassemlooy, Zabih, Rajbhandari, Sujan   +2 more
core   +1 more source

Joint Control of Radiated and Surface Waves via Space‐Time Coding Metasurfaces

Advanced Functional Materials, EarlyView.
A unified space‐time coding metasurface platform enables simultaneous control of radiated and surface‐confined waves across multiple harmonics. Demonstrated functionalities include multi‐frequency beam shaping; surface‐wave excitation, and hybrid multiplexing.
Zihao Dai, Yi Ning Zheng, Lei Zhang, Xiao Qing Chen, Giuseppe Castaldi, Tie Jun Cui, Vincenzo Galdi   +6 more
wiley   +1 more source

A 51.6 Mb/s Experimental VLC System Using a Monochromic Organic LED

IEEE Photonics Journal, 2018
An organic light emitting diode (OLED) shows characteristics different from a traditional semiconductor LED when both are applied to visible light communication (VLC).
Hanjie Chen, Zhengyuan Xu, Qian Gao, Shangbin Li   +3 more
doaj   +1 more source

High speed short range optical wireless ground-to-train communications [PDF]

, 2010
There is a huge demand for seamless high-speed communications in fast moving trains. People want broadband services while on board as in their home or in the workplace.
Ghassemlooy, Zabih, Le Minh, Hoa, Paudel, Rupak, Rajbhandari, Sujan   +3 more
core  

Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Adaptive Modulation and Coding With LDPC Codes and Retransmission for Ultraviolet Communication

IEEE Photonics Journal
To adapt to different transmission power and distances, we design a rate-compatible transmission protocol to realize different transmission rates for ultraviolet (UV) communication.
Fei Long, Jingyin Tang, Lingfeng Li, Jingyang Chen, Chen Gong, Zhengyuan Xu   +5 more
doaj   +1 more source

When Will You Have a New Mobile Phone? An Empirical Answer From Big Data

IEEE Access, 2016
When and why people change their mobile phones are important issues in mobile communications industry, because it will impact greatly on the marketing strategy and revenue estimation for both mobile operators and manufactures.
Qingli Ma, Sihai Zhang, Wuyang Zhou, Shui Yu, Chonggang Wang   +4 more
doaj   +1 more source

Free-Space Quantum Key Distribution

, 2016
Based on the firm laws of physics rather than unproven foundations of mathematical complexity, quantum cryptography provides a radically different solution for encryption and promises unconditional security.
Carrasco-Casado, Alberto, Denisenko, Natalia, Fernández, Verónica   +2 more
core   +1 more source