Bionic Covert Underwater Acoustic Communication Based on Time–Frequency Contour of Bottlenose Dolphin Whistle [PDF]
Entropy, 2022 In order to meet the requirements of communication security and concealment, as well as to protect marine life, bionic covert communication has become a hot research topic for underwater acoustic communication (UAC).
Lei Xie +3 more
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Influence of Temporal and Spatial Fluctuations of the Shallow Sea Acoustic Field on Underwater Acoustic Communication [PDF]
Sensors, 2022 In underwater acoustic communication (UAC) systems, the channel characteristics are mainly affected by spatiotemporal changes, which are specifically manifested by two factors: the effects of refraction and scattering caused by seawater layered media on ...
Zhichao Lv +6 more
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Study of the Performance of DSSS UAC System Depending on the System Bandwidth and the Spreading Sequence [PDF]
Sensors, 2021 A signal transmitted in an Underwater Acoustic Communication (UAC) system operating in a shallow-water channel suffers from strong time dispersion due to multipath propagation.
Iwona Kochanska +3 more
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Coded-GFDM for Reliable Communication in Underwater Acoustic Channels [PDF]
Sensors, 2022 The performance of the coded generalized frequency division multiplexing (GFDM) transceiver has been evaluated in a shallow underwater acoustic channel (UAC). Acoustic transmission is the scheme of choice for communication in UAC since radio waves suffer
Mohsin Murad +2 more
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HW/SW Platform for Measurement and Evaluation of Ultrasonic Underwater Communications [PDF]
Sensors, 2022 The purpose of this work is to present a flexible system that supports the study of wideband underwater acoustic communications (UAC). It has been developed both to measure channels and to test transmission techniques under realistic conditions in the ...
Unai Fernández-Plazaola +4 more
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OFDM System Design for Measured Ultrasonic Underwater Channels [PDF]
Sensors, 2022 In this paper, we present the development of a multicarrier modulation system of low complexity for broadband underwater acoustic communications (UAC), whose frequency band is located in the ultrasonic range, specifically between 32 kHz and 128 kHz ...
Pablo Cobacho-Ruiz +3 more
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A Novel Embedded Side Information Transmission Scheme Based on Polar Code for Peak-to-Average Power Ratio Reduction in Underwater Acoustic OFDM Communication System [PDF]
SensorsIn this paper, we proposed an embedded side information (SI) transmission scheme based on polar code construction for PAPR reduction using the PTS scheme in the underwater Acoustic (UWA) Orthogonal Frequency Division Multiplexing (OFDM) communication ...
Siyu Xing +3 more
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A Novel PTS Technique with Side Information Blind Detector Based on Minimized Error Accumulation for PAPR Reduction in Coded Underwater Acoustic OFDM Systems [PDF]
SensorsIn this paper, a partial transmit sequence (PTS) technique with a side information (SI) blind detector based on minimized error accumulation for PAPR reduction in the coded underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM ...
Siyu Xing +4 more
doaj +2 more sources
Results in EngineeringUnderwater acoustic communication (UAC) networks facilitate long-distance reliable information exchange in marine environments, while reconfigurable intelligent surface (RIS) offers significant benefits in underwater communication by mitigating signal ...
Moloy Kumar Ghosh +1 more
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UNDERWATER ACOUSTIC MODEM WITH HIGH PRECISION RANGING CAPABILITY BASED ON SECOND-LEVEL CESIUM ATOMIC CLOCK [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Equipped with a high-precision atomic clock can significantly improve the ranging accuracy of the underwater acoustic ranging system. However, the adverse characteristic of underwater acoustic channel (UAC) seriously deteriorates the ranging accuracy. In
J. Li +6 more
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