Results 141 to 150 of about 1,479 (180)

Multipath correlations in underwater acoustic communication channels

The Journal of the Acoustical Society of America, 2013
Uncorrelated scattering (US), which assumes that multipath arrivals undergo uncorrelated scattering and are thus uncorrelated, has been the standard model for digital communications including underwater acoustic communications. This paper examines the cross-correlation of multipath arrivals based on at-sea data with different temporal coherence time ...
S H, Huang, T C, Yang, Chen-Fen, Huang
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On the physics of underwater acoustic communications

AIP Conference Proceedings, 2012
Digital communications have been traditionally treated using signal processing approaches. Algorithm and performance is system-model dependent. For underwater acoustic communications, the system model is very complex due to the different channel environmental conditions which can vary rapidly with time, and are location dependent.
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Adaptive Modulation and Coding for Underwater Acoustic Communication

2019 Eleventh International Conference on Ubiquitous and Future Networks (ICUFN), 2019
In UWAC (Underwater Acoustic Communications), underwater acoustic channels change rapidly due to various environment condition. AMC (Adaptive Modulation and Coding) technique is efficient method for improving the system efficiency by changing transmission parameters according to channel conditions in underwater acoustic channels.
Hui Su Lee, Ji-Won Jung, Chang-Uk Baek, A. Hyun Lee, Wan-Jin Kim   +4 more
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Machine Learning for Underwater Acoustic Communications

IEEE Wireless Communications, 2022
Lihuan Huang, Yue Wang 0019, Qunfei Zhang, Jing Han 0008, Weijie Tan, Zhi Tian   +5 more
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Iterative Phase Compensation for Underwater Acoustic Communications

2008 IEEE Pacific-Asia Workshop on Computational Intelligence and Industrial Application, 2008
An iterative phase compensation algorithm is presented to recover carriers for underwater acoustic communications in this paper. The joint equalization and phase compensation are iteratively implemented. In a new iteration, the second-degree polynomial is used to fit a phase sequence. The performance of new algorithm is analyzed with simulations.
Mengyu Zhu, Yuliang Yang
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Swell effect in shallow underwater acoustic communications

2010 IEEE 15th Conference on Emerging Technologies & Factory Automation (ETFA 2010), 2010
The need for monitoring underwater sensors, communications between submarines or sonar, makes underwater acoustic communications an important field of research. Electromagnetic waves are quickly attenuated in this medium and thus acoustic waves are the best option for communications.
Joaquín Aparicio, Fernando J. Álvarez, Jesús Ureña, Ana Jiménez, Cristina Diego, Enrique García 0003   +5 more
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OFDM Simulator for Underwater Acoustic Communications

2023 14th International Conference on Information and Communication Technology Convergence (ICTC), 2023
Seyong Kim, Jeonghun Park, Mintaek Oh, Jinseok Choi   +3 more
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Underwater acoustic communications: Practice, modeling, and commentary

2010 7th International Symposium on Wireless Communication Systems, 2010
At present, the realities of acoustic communications and undersea networks differ substantially from the expectations arising from academic theory and investigation. The issue is not that the fundamentals of communications theory do not apply, but rather the fact that the difficulties of the acoustic channel do not necessarily fit the assumptions ...
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Ocean Variability Effects On Underwater Acoustic Communications

2007
Abstract : This proposed research seeks to identify, explain, and ultimately predict, the factors that significantly alter the operational effectiveness of underwater acoustic communications through experimental work and theoretical analysis. The long-term goal is to develop reliable, high rate transceivers customized for coherent underwater acoustic ...
Mohsen Badiey, Aijun Song
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Overview of Underwater Acoustic Communication

2018
Since radio signals are strongly attenuated in saltwater and often scattered by suspended particles (similar for optical signals), acoustic wave becomes major communication medium used in underwater environments (Preisig, Proceedings of the ACM international WS, underwater networks (WUWNet), Los Angeles, USA 2006, [1]). However, some characteristics of
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