M-ary Cyclic Shift Keying Spread Spectrum Underwater Acoustic Communications Based on Virtual Time-Reversal Mirror [PDF]
Sensors, 2019 Underwater acoustic communications are challenging because channels are complex, and acoustic waves when propagating in the ocean are subjected to a variety of interferences, such as noise, reflections, scattering and so on.
Feng Zhou +5 more
doaj +2 more sources
Accurate Channel Estimation and Adaptive Underwater Acoustic Communications Based on Gaussian Likelihood and Constellation Aggregation [PDF]
Sensors, 2022 Achieving accurate channel estimation and adaptive communications with moving transceivers is challenging due to rapid changes in the underwater acoustic channels.
Liang Wang +5 more
doaj +2 more sources
Generalized spatial modulation for underwater backscatter communication using acoustic metasurfaces [PDF]
Scientific ReportsDesign of a long-range, high data-rate and ultra low power underwater communications system is crucial for a variety of applications. However, this task is challenging because of the underwater channel dynamics, propagation characteristics and power ...
Ashwini H. Raghavendra +2 more
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Acoustic Parametric Signal Generation for Underwater Communication [PDF]
Sensors, 2018 This paper presents a study of different types of parametric signals with application to underwater acoustic communications. In all the signals, the carrier frequency is 200 kHz, which corresponds to the resonance frequency of the transducer under study ...
María Campo-Valera +6 more
doaj +4 more sources
Design and simulation of acoustic vortex wave arrays for long-range underwater communication [PDF]
JASA Express Letters, 2023 The formation and propagation of acoustic vortex waves have been of increasing interest for multiple applications, namely, underwater acoustic communications. Several methods have been presented to form these vortices in underwater environments; however,
Mark E. Kelly, Chengzhi Shi
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Single Carrier with Frequency Domain Equalization for Synthetic Aperture Underwater Acoustic Communications [PDF]
Sensors, 2017 Chengbing He, Han Wang, Lianyou Jing
exaly +2 more sources
A Non-Contact Vital Signs Detection in a Multi-Channel 77GHz LFMCW Radar System
IEEE Access, 2021 The technology of vital signs detection has been proven of great use, whereas it is still limited by several challenges. One of the major challenges is the random body movements (RBMs), which significantly degrade the accuracy of the measurement. In this
Qisong Wu +4 more
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CDMA for Underwater Acoustic Communication
CoRR, 2021 This paper provides an overview of how and why acoustic waves are important for underwater communication when compared with radio and optical waves, underwater acoustic channel, it's characteristics and model. Also about the underwater sensor architecture, challenges faced by sensor nodes in the network and Media Acess Control(MAC) protocol solutions ...
Lokesh Bommisetty +4 more
openaire +2 more sources
Analytical performance evaluation of GFDM in underwater acoustic communication systems
Revista Facultad de Ingeniería Universidad de Antioquia, 2021 The rapid growth of the Internet of Things (IoT) has extended its concept to underwater environments. However, the implementation of these systems via wired communication still represents a technological challenge, mainly due to the high cost of their ...
Alexander Hilario-Tacuri +3 more
doaj +1 more source
Experimental investigations of acoustic field in sea shelf zone [PDF]
E3S Web of Conferences, 2020 Developed experimental facility allows one to generate acoustic pressure within the intervals from 105 to 106 Pa with an affective system of matching layers of bottom, water and ice.
Chernenko Vasiliy +4 more
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