Results 231 to 240 of about 104,021 (275)

A Survey of Underwater Optical Wireless Communications

IEEE Communications Surveys and Tutorials, 2017
Underwater wireless communications refer to data transmission in unguided water environment through wireless carriers, i.e., radio-frequency (RF) wave, acoustic wave, and optical wave. In comparison to RF and acoustic counterparts, underwater optical wireless communication (UOWC) can provide a much higher transmission bandwidth and much higher data ...
Yuhan Dong, Julian Cheng
exaly   +2 more sources

Capacity of wireless optical communications

IEEE Journal on Selected Areas in Communications, 2003
We consider the ergodic capacity and capacity-versus-outage probability of direct-detection optical communication through a turbulent atmosphere using multiple transmit and receive apertures. We assume shot-noise-limited operation in which detector outputs are doubly stochastic Poisson processes whose rates are proportional to the sum of the ...
Shane M. Haas, Jeffrey H. Shapiro
openaire   +1 more source

Wireless optical communications: a survey

2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733), 2004
The demand for wireless broadband communications has been growing steadily for last several years. The congestion and the limitations on bandwidths of the radio spectrum have inhibited unrestricted growth of radio wireless systems. Wireless optical, however, holds the promise of delivering data rates that can meet the broadband requirements.
Ahmed M. Mahdy, Jitender S. Deogun
openaire   +1 more source

Guest editorial: optical wireless communications

IEEE Journal on Selected Areas in Communications, 2009
Optical wireless communication (OWC) systems provide many advantages over radio frequency (RF) wireless technologies in some scenarios, including significantly higher data rates and a large amount of available license-free frequency spectrum. Recently, OWC has also been proposed in fifth generation 5G standard as a tool to augment capacity due to RF ...
George K. Karagiannidis, Shlomi Arnon, John R. Barry, Robert Schober, Murat Uysal   +4 more
openaire   +1 more source

Optical Wireless Communication

Proceedings of the 24th Annual International Conference on Mobile Computing and Networking, 2018
Data is the new currency impacting everybody's lives. As the modern world receives & sends millions of Terabytes of data every day, the present-day wireless data communication technologies comprising of Wi-Fi & 4G-LTE is on the verge of becoming partially inept for information exchange as they suffer from spectrum congestion in both controlled and ...
openaire   +1 more source

Capacity of optical wireless communication channels

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2020
Optical wireless communications are realized by modulating the intensity of a light source and detecting intensity fluctuations at the receiver. This mode of operation, known as intensity modulation and direct detection (IM/DD), is simple to implement in practice.
A. Chaaban, S. Hranilovic
openaire   +3 more sources

Optical wireless communication for backhaul and access

2015 European Conference on Optical Communication (ECOC), 2015
We highlight new applications for optical wireless communication (OWC) as a mobile backhaul for WiFi, LTE and 5G and as a new access technology in the Internet of Things (IoT) where it enables secure and reliable communications at low latency.
Volker Jungnickel, Dominic Schulz, Jonas Hilt, Christos Alexakis, Michael Schlosser 0001, Liane Grobe, Anagnostis Paraskevopoulos, Ronald Freund, B. Siessegger, Gerhard Kleinpeter   +9 more
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Use Cases for Optical Wireless Communication

Optical Fiber Communication Conference, 2018
We present results from trials in three promising uses cases for optical wireless communication (OWC): Mobile backhaul, industrial wireless, and indoor Li-Fi. We point out specific requirements and illustrate performance through measurements in typical scenarios.
Dominic Schulz, Pablo Wilke Berenguer, Jonas Hilt, Peter Hellwig, Anagnostis Paraskevopoulos, Ronald Freund, Volker Jungnickel   +6 more
openaire   +2 more sources

On the capacity of indoor optical wireless communications

IEEE Communications Letters, 2006
In this letter, the capacity of an optical wireless communications system in an indoor environment is investigated. We consider various modulation schemes, e.g. pulse-position modulation (L-PPM), differential pulse-position modulation (L-DPPM) and differential amplitude pulse-position modulation (AtimesL-DAPPM).
Ubolthip Sethakaset, T. Aaron Gulliver
openaire   +1 more source

Optical wireless MIMO communications (OMIMO)

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005
We propose optical wireless multiple-input multiple-output (OMIMO) communications to achieve high speed transmission with a compact transmitter and receiver. In OMIMO, by using zero forcing (ZF), we can eliminate the other signal interferences transmitted from other optical transmit antennas.
Daisuke Takase, Tomoaki Ohtsuki
openaire   +1 more source