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We demonstrate robust light coupling between two single-mode fibers for an out-door FSO link through a focal plane array beamformer with 61 fine-pitched fiber cores as antenna elements. We show that favourable coupling conditions are…

Optics · Physics 2025-03-25 Florian Honz , Bernhard Schrenk

Infrared optical materials and devices are important for a wide range of applications in the defense, scientific, and consumer markets. For imaging, spectroscopy, microscopy and persistent surveillance, adaptive optic systems that span the…

The requirements in terms of service quality such as data rate, latency, power consumption, number of connectivity of future fifth-generation (5G) communication is very high. Moreover, in Internet of Things (IoT) requires massive…

Networking and Internet Architecture · Computer Science 2020-06-03 Mostafa Zaman Chowdhury , Moh Khalid Hasan , Md Shahjalal , Eun Bi Shin , Yeong Min Jang

Free Space Optics (FSO) communication provides attractive bandwidth enhancement with unlicensed bands worldwide spectrum. However, the link capacity and availability are the major concern in the different atmospheric conditions. The…

Signal Processing · Electrical Eng. & Systems 2023-10-23 Gebrehiwet Gebrekrstos Lema

We present a hardware-integrated security framework for LiFi networks through device fingerprint extraction within the IEEE 802.15.7 protocol. Our Optic Fingerprint (OFP) model utilizes inherent LED nonlinearities to generate…

Signal Processing · Electrical Eng. & Systems 2025-04-18 Ziqi Liu , Xuanbang Chen , Xun Zhang

LiFi is a networked wireless communication technology transforming solid-state indoor lighting into a backbone for information. The technology has reached maturity, with the first LiFi LED luminaire commercialized in 2016. Real life…

Applied Physics · Physics 2018-02-07 Christophe Jurczak

We report on a fully bi-directional 680~km fiber link connecting two cities for which the equipment, the set up and the characterization are managed for the first time by an industrial consortium. The link uses an active telecommunication…

Achieving adequate coverage with high gain antennas is key to realizing the full promise of the wide bandwidth available at cm/mm bands. We report extensive outdoor measurements at 28 GHz in suburban residential areas in New Jersey and…

Information Theory · Computer Science 2019-10-15 Jinfeng Du , Dmitry Chizhik , Rodolfo Feick , Mauricio Rodriguez , Guillermo Castro , Reinaldo. A. Valenzuela

Wireless Fidelity or Wi-Fi, has completely transfigured wireless networking by offering a smooth connection to the internet and networks, particularly when dealing with enclosed environments. As with the majority of wireless technology, it…

Emerging Technologies · Computer Science 2025-02-12 Aditya Mitra , Anisha Ghosh , Sibi Chakkaravarthy S , Devi Priya VS

High reliability and availability of communication services is a key requirement that needs to be ensured by service providers. Since the direct line-of-sight (LOS) beam is prone to blockage in indoor optical wireless communication systems,…

Optics offers unique opportunities for reducing energy in information processing and communications while resolving the problem of interconnect bandwidth density inside machines. Such energy dissipation overall is now at environmentally…

Optics · Physics 2017-01-30 David A. B. Miller

Wireless transfer of information is the basis of modern communication. It includes cellular, WiFi, Bluetooth and GPS systems, all of which use electromagnetic radio waves with frequencies ranging from typically 100 MHz to a few GHz.…

Applied Physics · Physics 2017-10-03 Joseph A Boales , Farrukh Mateen , Pritiraj Mohanty

Free-space optical communication (FSO) can achieve fast, secure and license-free communication without need for physical cables, making it a cost-effective, energy-efficient and flexible solution when the fiber connection is unavailable. To…

Signal Processing · Electrical Eng. & Systems 2023-04-18 Yao Zhang , Hua-Ying Liu , Xiaoyi Liu , Peng Xu , Xiang Dong , Pengfei Fan , Xiaohui Tian , Hua Yu , Dong Pan , Zhijun Yin , Guilu Long , Shi-Ning Zhu , Zhenda Xie

Received signal strength (RSS)-based optical wireless positioning (OWP) systems are becoming popular for indoor localization because they are low-cost and accurate. However, few open-source datasets are available to test and analyze…

Signal Processing · Electrical Eng. & Systems 2025-05-23 Fan Wu , Jorik De Bruycker , Daan Delabie , Nobby Stevens , Francois Rottenberg , Lieven De Strycker

Providing high data rates is one of the big concerns in visible light communication (VLC) systems. This paper introduces a data centre design that use a VLC system for downlink communication. In this work, RYGB laser diodes (LD) are used as…

Signal Processing · Electrical Eng. & Systems 2019-03-30 Osama Zwaid Alsulami , Mohamed O. I. Musa , Mohammed T. Alresheedi , Jaafar M. H. Elmirghani

In this era of modern devices and high speed communication the issue of spectral overloading is increasing with time and becoming more serious. With the advancement in LED industry, light fidelity (Li-Fi) based indoor network is an…

Networking and Internet Architecture · Computer Science 2016-10-26 Farooq Aftab

Optical Wireless Communication (OWC) is regarded as an auspicious communication approach that can outperform the existing wireless technology. It utilizes LED lights, whose subtle variation in radiant intensity generate a binary data…

Robotics · Computer Science 2022-05-10 Fadi Al-Turjman , Diletta Cacciagrano , Leonardo Mostarda , Mattia Paccamiccio , Zaib Ullah

Interconnecting devices in an indoor environment using the illumination system and white light emitting diodes (LED) requires adaptive networking techniques that can provide network access for multiple users. Two techniques based on…

Information Theory · Computer Science 2013-08-06 Mohammad Noshad , Maite Brandt-Pearce

The fifth generation (5G) cellular communication system will have several advanced features, majority of which will come into existence for the first time. According to the ITU recommendations, 5G will provide minimum 3 GB/s end to end data…

Signal Processing · Electrical Eng. & Systems 2019-03-26 Sudhir K. Routray , Habib H. Mohammed

Visible light communication (VLC) has wide unlicensed bandwidth, enables communication in radio frequency (RF) sensitive environments, realizes energy-efficient data transmission, and has the potential to boost the capacity of wireless…

Networking and Internet Architecture · Computer Science 2015-03-11 Sihua Shao , Abdallah Khreishah , Moussa Ayyash , Michael B. Rahaim , Hany Elgala , Volker Jungnickel , Dominic Schulz , Thomas D. C. Little