Results 21 to 30 of about 14,824 (317)

Application of chip MAX9814 in MFSK underwater acoustic communication anti-amplitude fading processing

Dianzi Jishu Yingyong, 2021
With the rapidly increasing interests in ocean observation and ocean Internet of Things, low-cost underwater acoustic communication equipment draws more and more attention from the research community.
Li Shuang, Qiu Yifan, Tong Feng
doaj   +1 more source

Resonance-Based Time-Frequency Manifold for Feature Extraction of Ship-Radiated Noise

Sensors, 2018
In this paper, a novel time-frequency signature using resonance-based sparse signal decomposition (RSSD), phase space reconstruction (PSR), time-frequency distribution (TFD) and manifold learning is proposed for feature extraction of ship-radiated noise,
Jiaquan Yan, Haixin Sun, Hailan Chen, Naveed Ur Rehman Junejo, En Cheng   +4 more
doaj   +1 more source

Node Energy Consumption Balanced Multi-Hop Transmission for Underwater Acoustic Sensor Networks Based on Clustering Algorithm

IEEE Access, 2020
With the advancement and implementation of marine strategies in various countries, it is of great significance to collect marine data by using underwater acoustic sensor networks (UWA-SNs).
Meihuang Wang, Yougan Chen, Xiang Sun, Fanggui Xiao, Xiaomei Xu   +4 more
doaj   +1 more source

ECRKQ: Machine Learning-Based Energy-Efficient Clustering and Cooperative Routing for Mobile Underwater Acoustic Sensor Networks

IEEE Access, 2021
The dynamic topology, narrow transmission bandwidth, and limited energy of sensor nodes in mobile underwater acoustic sensor networks (UASNs) pose challenges to design an efficient and robust network for underwater communications.
Jianying Zhu, Yougan Chen, Xiang Sun, Jianming Wu, Zhenwen Liu, Xiaomei Xu   +5 more
doaj   +1 more source

A Biological Sensor System Using Computer Vision for Water Quality Monitoring

IEEE Access, 2018
Water pollution has seriously threatened our life, so an effective water quality monitoring mechanism is the most important part of water quality management.
Fei Yuan, Yifan Huang, Xin Chen, En Cheng   +3 more
doaj   +1 more source

MF-HER: Marine Mammal-Friendly Based High Spectral-Efficient Routing for Underwater Acoustic Sensor Networks

IEEE Access, 2020
In real ocean environments, artificial acoustic and natural acoustic systems are coexisted to share scarce spectrum resources. In this paper, we propose a marine mammals-friendly based high spectral-efficient routing (MF-HER) protocol to improve spectrum
Yougan Chen, Xinrui Zhang, Xiang Sun, Yi Tao, Xiaomei Xu   +4 more
doaj   +1 more source

Underwater Wireless Communications

Sensors
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
openaire   +3 more sources

Sound Reception in the Yangtze Finless Porpoise and Its Extension to a Biomimetic Receptor

Biomimetics, 2023
Sound reception was investigated in the Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis) at its most sensitive frequency. The computed tomography scanning, sound speed, and density results were used to develop a three-dimensional ...
Zhongchang Song, Wenzhan Ou, Jiao Li, Chuang Zhang, Weijie Fu, Wenjie Xiang, Ding Wang, Kexiong Wang, Yu Zhang   +8 more
doaj   +1 more source

Laser based underwater communication systems [PDF]

2016 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. We also discuss the advantages of operating with single mode laser devices and matched filtering at the receiver in the context of ...
Giuliano, Giovanni, Viola, Shaun, Watson, Scott, Laycock, Leslie, Rowe, Duncan, Kelly, Anthony E.   +5 more
openaire   +1 more source

Using Orthogonal Combined Signals in Broadband ADCP for Improving Velocity Measurement

Journal of Marine Science and Engineering, 2020
Broadband Acoustic Doppler Current Profiler (BBADCP) is a widely used technology in velocity measurements. To adapt to the varied water environment and different measurement requirements, flexible tuning of transmitted signal parameters will improve the ...
Yujing Lin, Fei Yuan, En Cheng
doaj   +1 more source