Results 21 to 30 of about 18,223 (315)

The Influence of MAC Protocol on a Non-Synchronous Localization Scheme in Large-Scale UWSNs

open access: yesIEEE Access, 2018
Localization plays a more and more important role in underwater wireless sensor networks (UWSNs). But in the large-scale UWSNs, the localization algorithm can’t be realized for the continuous packet collision.
Keyu Chen   +4 more
doaj   +1 more source

Time Synchronization Scheme of Underwater Platforms Using Wireless Acoustic and Optical Communication

open access: yes, 2022
Publisher Copyright: © 2022 IEEE.Time synchronization in autonomous underwater vehicle (AUV) formations is significant for joint underwater survey tasks.
Matsuda, Takumi   +5 more
core   +1 more source

Adaptive Underwater Acoustic Communications [PDF]

open access: yes, 2010
Underwater wireless networks consist of mobile and static nodes, which usually communicate using the acoustic channel since radio transmissions attenuate rapidly and optical communication is only suitable for short distances. The underwater acoustic channel is plagued with issues of high transmission power requirements, rapidly changing channel ...
Anuj Sehgal, Jürgen Schönwälder
openaire   +1 more source

Selective Dynamic Coded Cooperative Communications for Multi-Hop Underwater Acoustic Sensor Networks

open access: yesIEEE Access, 2019
Due to the limitation of acoustic velocity in underwater environments, propagation delay is a horrible problem in multi-hop underwater acoustic sensor networks (UW-ASNs).
Yougan Chen   +4 more
doaj   +1 more source

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

open access: yesDianzi 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

A Compact Acoustic Communication Module for Remote Control Underwater [PDF]

open access: yes, 2015
This paper describes an end-to-end compact acoustic communication system designed for easy integration into remotely controlled underwater operations. The system supports up to 2048 commands that are encoded as 16 bit words.
DelPreto, Joseph Jeff   +7 more
core   +1 more source

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

open access: yesSensors, 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   +4 more
doaj   +1 more source

Underwater turbulence on scintillating-fiber based omnidirectional underwater wireless optical communication system

open access: yes, 2022
The underwater wireless optical communication (UWOC) technology is vastly developing due to its advantages of high bandwidth, large capacity, and low latency.
Ng, Tien Khee   +5 more
core   +1 more source

Using Orthogonal Combined Signals in Broadband ADCP for Improving Velocity Measurement

open access: yesJournal 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

A Biological Sensor System Using Computer Vision for Water Quality Monitoring

open access: yesIEEE 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   +3 more
doaj   +1 more source

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