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This research presents a novel application of computer vision (CV) and deep learning methods for real-time sea state recognition, aiming to contribute to improving the operational safety and energy efficiency of seagoing vessels, key…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Aleksandar Vorkapic , Miran Pobar , Marina Ivasic-Kos

The world is often stricken by catastrophic disasters. On-demand drone-mounted visible light communication (VLC) networks are suitable for monitoring disaster-stricken areas for leveraging disaster-response operations. The concept of an…

Robotics · Computer Science 2020-11-09 Yukito Onodera , Hiroki Takano , Daisuke Hisano , Yu Nakayama

Localization is one of the most important problems in various fields such as robotics and wireless communications. For instance, Unmanned Aerial Vehicles (UAVs) require the information of the position precisely for an adequate control…

Signal Processing · Electrical Eng. & Systems 2021-09-28 Kutay Bölat

Visible Light Communication~(VLC) systems provide not only illumination and data communication, but also indoor monitoring services if the effect that different events create on the received optical signal is properly tracked. For this…

Signal Processing · Electrical Eng. & Systems 2021-01-27 Mehmet C. Ilter , Alexis A. Dowhuszko , Jyri Hämäläinen , Risto Wichman

Light Detection and Ranging (LiDAR) are fast emerging sensors in the field of Earth Observation. It is a remote sensing technology that utilizes laser beams to measure distances and create detailed three-dimensional representations of…

Signal Processing · Electrical Eng. & Systems 2025-04-15 Saad Ahmed Jamal

In this work, we present a unified framework for the performance analysis of dual-hop underwater wireless optical communication (UWOC) systems with amplify-and-forward fixed gain relays in the presence of air bubbles and temperature…

Information Theory · Computer Science 2020-07-08 Emna Zedini , Abla Kammoun , Hamza Soury , Mounir Hamdi , Mohamed-Slim Alouini

Unknown inputs related to, e.g., sensor aging, modeling errors, or device bias, represent a major concern in wireless sensor networks, as they degrade the state estimation performance. To improve the performance, unknown-input observers…

Systems and Control · Electrical Eng. & Systems 2024-10-07 Yuzhou Wei , Giorgia Disarò , Wenjie Liu , Jian Sun , Maria Elena Valcher , Gang Wang

A previously unknown form of compromising emanations has been discovered. LED status indicators on data communication equipment, under certain conditions, are shown to carry a modulated optical signal that is significantly correlated with…

Cryptography and Security · Computer Science 2023-07-17 Joe Loughry , David A. Umphress

This paper will focus on the energy efficiency issue in Underwater Wireless Sensor Networks. In underwater environment, the two main issues are namely: reliability and energy efficiency. These two issues are twisted pair. Reliability…

Networking and Internet Architecture · Computer Science 2013-10-11 S. Pavan Kumar Reddy , Y. Ganesh Kumar Reddy , K. Chandra Mouli , U. Seshadri

A unified statistical model is proposed to characterize turbulence-induced fading in underwater wireless optical communication (UWOC) channels in the presence of air bubbles and temperature gradient for fresh and salty waters, based on…

Information Theory · Computer Science 2018-10-16 Emna Zedini , Hassan M. Oubei , Abla Kammoun , Mounir Hamdi , Boon S. Ooi , Mohamed-Slim Alouini

Localization of underwater networks is important in many military and civil applications. Because GPS receivers do not work below the water surface, traditional localization methods form a relative topology of underwater nodes (UWNs) and…

Signal Processing · Electrical Eng. & Systems 2022-01-24 Muntasir Mahmud , Mohamed Younis , Gary Carter , Fow-Sen Choa

Underwater object detection (UOD) is crucial for marine economic development, environmental protection, and the planet's sustainable development. The main challenges of this task arise from low-contrast, small objects, and mimicry of…

Computer Vision and Pattern Recognition · Computer Science 2023-06-02 Linhui Dai , Hong Liu , Pinhao Song , Hao Tang , Runwei Ding , Shengquan Li

Modeling wave energy converters (WECs) to accurately predict their hydrodynamic behavior has been a challenge for the wave energy field. Often, this results in either low-fidelity, linear models that break down in energetic seas, or…

Fluid Dynamics · Physics 2023-06-07 Brittany Lydon , Brian Polagye , Steven Brunton

Underwater imagery has enabled numerous civilian applications in various domains, ranging from academia to industry, and from industrial surveillance and maintenance to environmental protection and behavior of marine creatures studies. The…

Signal Processing · Electrical Eng. & Systems 2019-10-22 Mehdi Rahmati , Dario Pompili

Visible Light Communication (VLC) technology using light emitting diodes (LEDs) has been gaining increasing attention in recent years as it is appealing for a wide range of applications such as indoor positioning. Orthogonal frequency…

Information Theory · Computer Science 2015-05-08 Mohammadreza Aminikashani , Wenjun Gu , Mohsen Kavehrad

Shallow seawaters are problematic for acoustic and optical communications. Sensor networks based on electromagnetic (EM) communications are evaluated in this environment. In order to characterize the subaquatic channel, several measurement…

This paper presents an approach for visible light communication-based indoor positioning using compressed sensing. We consider a large number of light emitting diodes (LEDs) simultaneously transmitting their positional information and a…

Information Theory · Computer Science 2018-05-04 Kristina Gligoric , Manisha Ajmani , Dejan Vukobratovic , Sinan Sinanovic

The underwater propagation environment for visible light signals is affected by complex factors such as absorption, shadowing, and reflection, making it very challengeable to achieve effective underwater visible light communication (UVLC)…

Signal Processing · Electrical Eng. & Systems 2023-03-14 Younan Mou , Sicong Liu

State estimation is key to both analyzing physical mechanisms and enabling real-time control of fluid flows. A common estimation approach is to relate sensor measurements to a reduced state governed by a reduced-order model (ROM). (When…

Fluid Dynamics · Physics 2020-06-10 Nirmal J. Nair , Andres Goza

Optical wireless communication (OWC) provides high aggregate data rates in the range of Terabits per second (Tb/s). Specifically, OWC using infrared lasers as transmitters has been considered as a strong candidate in the next generation of…

Signal Processing · Electrical Eng. & Systems 2023-07-18 Khulood D. Alazwary , Ahmad Adnan Qidan , T. E. H. El-Gorashi , Jaafar M. H. Elmirghani