Results 11 to 20 of about 873,936 (270)

A First Implementation of Underwater Communications in Raw Water Using the 433 MHz Frequency Combined with a Bowtie Antenna. [PDF]

open access: yesSensors (Basel), 2019
In 2016, there were 317 serious water pollution incidents in the UK, with 78,000 locations where businesses discharge controlled quantities of pollutants into rivers; therefore, continuous monitoring is vital. Since 1998, the environment agency has taken
Ryecroft S   +6 more
europepmc   +2 more sources

Wideband and Wide Beam Polyvinylidene Difluoride (PVDF) Acoustic Transducer for Broadband Underwater Communications. [PDF]

open access: yesSensors (Basel), 2019
The advances in wireless communications are still very limited when intended to be used on Underwater Communication Systems mainly due to the adverse proprieties of the submarine channel to the acoustic and radio frequency (RF) waves propagation.
Martins MS   +7 more
europepmc   +2 more sources

Underwater Wireless Communications

open access: yesSensors
Effective underwater wireless communications (UWCs) are essential for a variety of military and civil applications, such as submarine communication and discovery of new natural resources in the underwater environment [...]
Hamada Esmaiel, Haixin Sun
doaj   +3 more sources

Generalized spatial modulation for underwater backscatter communication using acoustic metasurfaces [PDF]

open access: yesScientific Reports
Design of a long-range, high data-rate and ultra low power underwater communications system is crucial for a variety of applications. However, this task is challenging because of the underwater channel dynamics, propagation characteristics and power ...
Ashwini H. Raghavendra   +2 more
doaj   +2 more sources

Underwater Optical Wireless Communications: Overview [PDF]

open access: yesSensors, 2020
Underwater Optical Wireless Communication (UOWC) is not a new idea, but it has recently attracted renewed interest since seawater presents a reduced absorption window for blue-green light.
Giuseppe Schirripa Spagnolo   +2 more
doaj   +3 more sources

Cellular Underwater Wireless Optical CDMA Network: Potentials and Challenges [PDF]

open access: yesIEEE Access, 2016
Underwater wireless optical communications are an emerging solution to the expanding demand for broadband links in oceans and seas. In this paper, a cellular underwater wireless optical code division multiple-access network is proposed to provide ...
Farhad Akhoundi   +5 more
doaj   +3 more sources

Laser Based Underwater Communication Systems [PDF]

open access: yes2016 18th International Conference on Transparent Optical Networks (ICTON), 2016
We report on recent progress in the field of visible light communications including direct modulation of blue laser devices at data rates beyond 10 Gbit/s, and the transmission of 2.5 Gbit/s OOK data through water.
Giuliano, Giovanni   +5 more
core   +2 more sources

A metasurface-based full-color circular auto-focusing Airy beam transmitter for stable high-speed underwater wireless optical communications

open access: yesNature Communications
Due to its unique intensity distribution, self-acceleration, and beam self-healing properties, Airy beam holds great potential for optical wireless communications in challenging channels, such as underwater environments.
Junhui Hu   +11 more
semanticscholar   +3 more sources

Underwater Optical Wireless Communications in Swarm Robotics: A Tutorial

open access: yesIEEE Communications Surveys and Tutorials, 2021
Underwater swarm robotics is an emerging topic. Compared to individual autonomous vehicles, high-capacity communication links are required between the mobile agents.
P. Hoeher, Jan Sticklus, Andrej Harlakin
semanticscholar   +3 more sources

AI-Driven Adaptive Communications for Energy-Efficient Underwater Acoustic Sensor Networks [PDF]

open access: yesSensors
Underwater acoustic sensor networks, crucial for marine monitoring, face significant challenges, including limited bandwidth, high delay, and severe energy constraints.
A. Ur Rehman   +2 more
doaj   +2 more sources

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