Results 41 to 50 of about 8,307 (202)

Channel Polarization Scheme for Ocean Turbulence Channels in Underwater Visible Light Communication

Journal of Marine Science and Engineering, 2023
Underwater wireless communication technology plays an important role in marine environment monitoring and ecological protection. Underwater optical wireless communications (UWOCs) can currently achieve a transmission distance of hundreds of meters, and ...
Xiaoji Li, Leiming Sun, Jiemei Huang, Fanze Zeng   +3 more
doaj   +1 more source

Krill: An exploration in underwater sensor networks [PDF]

, 2005
While sensor networks have now become very popular on land, the underwater environment still poses some difficult problems. Communication is one of the difficult challenges under water. There are two options: optical and acoustic.
Chen, P., Corke, Peter, Dunbabin, Matthew, Kotay, K., Overs, Leslie, Rus, Daniela, Sikka, Pavan, Vasilescu, Iuliu   +7 more
core   +3 more sources

Blue Laser Optical NOMA Communication Applied on Control Drone-to-Underwater Vehicle

Al-Iraqia Journal for Scientific Engineering Research
Today deep ocean life has not been discovered by humans including many secret world things to be explored. The researcher has focused on underwater optical wireless communications using various kinds of complex digital Signal processing most of them ...
Sameer Sami Hassan Al-Obaidi
doaj   +1 more source

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

Sensors, 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
Samuel Ryecroft, Andrew Shaw, Paul Fergus, Patryk Kot, Khalid Hashim, Adam Moody, Laura Conway   +6 more
doaj   +1 more source

A Comparative Survey of Optical Wireless Technologies: Architectures and Applications

, 2018
New high-data-rate multimedia services and applications are evolving continuously and exponentially increasing the demand for wireless capacity of fifth-generation (5G) and beyond.
Chowdhury, Mostafa Zaman, Hossan, Md. Tanvir, Islam, Amirul, Jang, Yeong Min   +3 more
core   +1 more source

Adaptive beam shaping for enhanced underwater wireless optical communication

Optics Express, 2021
In this paper, we proposed and experimentally verified a diffraction-based optical beam shaping technique for underwater optical communication (UWOC) applications. The proposed method aimed to address the key issue in UWOC links, i.e., the high propagation loss experienced by the launched optical beam.
Jiewen Nie, Lei Tian, Haozhi Wang, Long Chen, Zhuoran Li, Song Yue, Zichen Zhang, Haining Yang   +7 more
openaire   +2 more sources

Multi-Degree-of-Freedom for Underwater Optical Wireless Communication with Improved Transmission Performance

Journal of Marine Science and Engineering, 2022
Underwater optical wireless communication (UOWC) has great potential to provide high-speed and intensive communications over short ranges underwater. However, the mobility of the UOWC system is limited by the strict alignment requirements between the ...
Anliang Liu, Ruolin Zhang, Bin Lin, Hongxi Yin   +3 more
doaj   +1 more source

Marine Wireless Big Data: Efficient Transmission, Related Applications, and Challenges

, 2017
The vast volume of marine wireless sampling data and its continuously explosive growth herald the coming of the era of marine wireless big data. Two challenges imposed by these data are how to fast, reliably, and sustainably deliver them in extremely ...
Jiang, Tao, Li, Wei, Li, Yuzhou, Zhang, Yu   +3 more
core   +1 more source

Underwater optical wireless communications, networking, and localization: A survey [PDF]

Ad Hoc Networks, 2019
Underwater wireless communications can be carried out through acoustic, radio frequency (RF), and optical waves. Compared to its bandwidth limited acoustic and RF counterparts, underwater optical wireless communications (UOWCs) can support higher data rates at low latency levels. However, severe aquatic channel conditions (e.g., absorption, scattering,
Nasir Saeed, Abdulkadir Celik, Tareq Y. Al-Naffouri, Mohamed-Slim Alouini   +3 more
openaire   +3 more sources

Magnetic Field Driven Microrobot Based on Hydrogels

Advanced Robotics Research, EarlyView.
Hydrogel‐based magnetic microrobots synergize remote magnetic control with the biocompatibility of flexible hydrogels, emerging as promising tools for minimally invasive biomedicine. This enables remotely controllable, untethered navigation within complex biological microenvironments.
Juncai Song, Yubing Guo
wiley   +1 more source