Results 71 to 80 of about 3,620 (223)
Network-Assisted Underwater Acoustic Communications
, 2020 For many underwater acoustic applications, the source and receiver systems carry a single transducer antenna. The lack of spatial diversity makes it difficult to carry out phase coherent communications.
T C Yang, Kevin D Heaney
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Advanced Science, Volume 13, Issue 12, 27 February 2026.Acoustic holograms act as key tools for information encryption, yet current schemes limit encryption dimensionality/security and require time‐consuming decryption. A compact device integrates multi‐dimensional cascaded acoustic holography with particle manipulation, employs extra secret keys, enables rapid decryption, and is validated via 1D/2D/3D ...
Qin Lin +8 more
wiley +1 more source
Enhanced Mobile Multiple-Input Multiple-Output Underwater Acoustic Communications
International Journal of Distributed Sensor Networks, 2013 This paper focuses on mobile multiple-input multiple-output (MIMO) underwater acoustic communications (UAC) over double-selective channels subject to both intersymbol interference and Doppler scaling effects.
Kexin Zhao, Jun Ling, Jian Li
doaj +1 more source
Evaluating the Risk of Collision of Seals Swimming Within Metres of Operating Tidal Turbines
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.ABSTRACT We used imaging sonar to continuously monitor wildlife at an operational tidal turbine in the Pentland Firth, Scotland, between May 2022 and June 2023. Of 704 detected seal tracks, 347 occurred during turbine operation and 122 of these were detected directly upstream of the rotating blades in the horizontal plane.
Jessica Montabaranom +4 more
wiley +1 more source
Shallow Water Experiment of OFDM Underwater Acoustic Communications
Archives of Acoustics, 2020 The large variability of communication properties of underwater acoustic channels, and especially the strongly varying instantaneous conditions in shallow waters, is a challenge for the designers of underwater acoustic communication (UAC) systems.
Iwona KOCHAŃSKA +2 more
doaj +1 more source
Underwater optical wireless sensor network [PDF]
The thesis details the development of a short range, multi-hop underwater optical wireless sensor network. Multi-hop underwater optical wireless communication using a line of sight (LOS) link can provide a greater range compared to a single hop ...
Ahmad, Zahir Uddin
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Next-generation underwater localization: Artificial Intelligence-based and energy-aware approaches
Applied Ocean ResearchDesigning accurate, reliable, and energy-efficient localization techniques for underwater acoustic networks is highly challenging due to factors such as large propagation delays, the absence of Global Positioning System (GPS), node mobility, and limited ...
Mainul Islam Chowdhury +4 more
doaj +1 more source
Environmental Model-Based Time-Reversal Underwater Communications
IEEE Access, 2018 This paper addresses channel compensation in underwater acoustic communications by proposing a method for inserting physical propagation modeling into a passive time-reversal (PTR) receiver.
Lussac P. Maia +2 more
doaj +1 more source
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.ABSTRACT Monitoring and understanding the population structure of anadromous fishes is vital to their conservation. The southern distinct population segment of green sturgeon (Acipenser medirostris) is a threatened long‐lived anadromous fish, for which we have insufficient information about fundamental aspects of population structure.
Peter N. Dudley +2 more
wiley +1 more source
Environmental-friendly underwater acoustic communication and networks
, 2012 Intense harvesting of ocean resources extended exploitation activities to previously unexplored open ocean areas, to greater ocean depths and to remote polar regions. Such activities include, but are not limited to, energy, geology and fisheries.
Jesus, S. M.
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