Results 21 to 30 of about 2,309,558 (245)
IEEE Access, 2019 The characterization of wideband underwater acoustic (UWA) multi-path signals is investigated in this paper. The UWA multi-path channel can be considered as a sparse model and it causes changes of the transmitted signal on Doppler factor, time delay, and
Shuxia Huang, Shiliang Fang, Ning Han
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Digital signal processing for underwater acoustic in-band full-duplex communication
, 2023 Cimini, Leonard J., Jr.Xia, Xiang-GenSong, AijunAcoustic signals are widely used for communication in the underwater environment. However, due to using narrow acoustic frequency bands, underwater transmission suffers from low data rates.
Towliat, Mohammad
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Environmental-friendly underwater acoustic communication and networks [PDF]
, 2012 Intense harvesting of ocean resources extended exploitation activities to previously unexplored open ocean areas, to greater ocean depths and to remote polar regions. Such activities include, but are not limited to, energy, geology and fisheries.
Jesus, S. M.
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Sensors, 2019 Direct sequence spread spectrum (DSSS) signals are now widely used in air and underwater acoustic communications. A receiver which does not know the pseudo-random (PN) sequence cannot demodulate the DSSS signal.
Yangjie Wei +3 more
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A Nonlinear Data-Driven Towed Array Shape Estimation Method Using Passive Underwater Acoustic Data
Remote Sensing, 2022 Large-aperture towed linear hydrophone array has been widely used for beamforming-based signal enhancement in passive sonar systems; however, its performance can drastically decrease due to the array distortion caused by rapid tactical maneuvers of the ...
Qisong Wu, Youhai Xu
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Journal of Marine Science and Engineering, 2021 For tackling the challenge of in-time searching a sea-crashed plane, it is critical to develop a convenient and reliable detector for the underwater beacon signal. In the application of signal detection, a conventional detector such as linear correlation
Shuai Yao, Yinjia Liu
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High-Resolution Through-the-Wall Radar Imaging with Exploitation of Target Structure
Applied Sciences, 2022 It is quite challenging for through-the-wall radar imaging (TWRI) to achieve high-resolution ghost-free imaging with limited measurements in an indoor multipath scenario.
Chendong Xu, Qisong Wu
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水下无人系统学报With the rapid development of underwater unmanned platforms and miniaturized equipment, the demand for detecting and recognizing small underwater targets has become increasingly significant.
Zhizhen WANG +7 more
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IEEE Access, 2019 With respect to the frequency estimation of a real-valued single-tone, a direct frequency estimation method is proposed to acquire fine-resolution parameter by only utilizing three discrete Fourier transform (DFT) samples around the peak. Inspired by the
Shuai Yao, Qisong Wu, Shiliang Fang
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Multi-Head Attention-Based Long Short-Term Memory for Depression Detection From Speech
Frontiers in Neurorobotics, 2021 Depression is a mental disorder that threatens the health and normal life of people. Hence, it is essential to provide an effective way to detect depression.
Yan Zhao +6 more
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