Results 51 to 60 of about 4,672,975 (205)
Multiuser chirp modulation for underwater acoustic channel based on VTRM
International Journal of Naval Architecture and Ocean Engineering, 2017 In this paper, an ascheme is proposed for multiuser underwater acoustic communication by using the multi-chirp rate signals. It differs from the well known TDMA (Time Division Multiple Access), FDMA (Frequency Division Multiple Access) or CDMA (Code ...
Fei Yuan, Qian Wei, En Cheng
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High precision DOA estimation of microphone array for shipboard teleconferencing
Dianzi Jishu Yingyong, 2022 With the improvement of ship intelligence level, shipboard teleconferencing system is of great significance to improve the emergency handling capacity and promote the construction of shipboard integrated network.
Liu Yuji +4 more
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An Approach for Diver Passive Detection Based on the Established Model of Breathing Sound Emission
Journal of Marine Science and Engineering, 2020 Diver breathing sounds can be used as a characteristic for the passive detection of divers. This work introduces an approach for detecting the presence of a diver based on diver breathing sounds signals.
Qiang Tu, Fei Yuan, Weidi Yang, En Cheng
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Application of Underwater Visible Light Communication in Underwater Warfare System
水下无人系统学报, 2022 Underwater visible light communication is a technology that can realize two-way high-speed underwater communication in underwater warfare information systems, suitable for the protection of unmanned undersea vehicle(UUV) reconnaissance information, UUV ...
Bin-bin LÜ, Ming-lai LIN, Xin WAN
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Journal of Marine Science and EngineeringOptical attenuation caused by absorption and scattering in turbid water significantly degrades underwater image quality, making reliable underwater imaging a challenging problem.
Qingyu Liu +6 more
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R&D of a low-complexity OFDM acoustic communication payload for Micro-AUV in confined space
EURASIP Journal on Advances in Signal Processing, 2022 With small size, high flexibility, low cost, and deployment convenience, Micro-sized autonomous underwater vehicle (Micro-AUV) is capable of performing diverse underwater missions efficiently in confined underwater space, for the extensive purpose of ...
Weihua Jiang +4 more
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On the consistency of MODIS chlorophyll $a$ products in the northern South China Sea [PDF]
Biogeosciences, 2014 Chlorophyll a (Chl) concentrations derived from satellite measurements have been used in oceanographic research, for example to interpret eco-responses to environmental changes on global and regional scales.
S. L. Shang +5 more
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Underwater Acoustic Target Recognition Based on Supervised Feature-Separation Algorithm
Sensors, 2018 For the purpose of improving the accuracy of underwater acoustic target recognition with only a small number of labeled data, we proposed a novel recognition method, including 4 steps: pre-processing, pre-training, fine-tuning and recognition.
Xiaoquan Ke, Fei Yuan, En Cheng
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Parametric Underwater Communications [PDF]
Proceedings of Meetings on Acoustics, 2012 High performance acoustic underwater communications require high bandwidths for high data rates, low carrier frequencies for low channel attenuation and highly directive transducers. These at first sight contradictory requirements can be satisfied by employing parametric arrays. In this way highly directive radiation, which mitigates multipath and thus
Karsten Wiedmann +2 more
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Underwater optical wireless sensor network for real-time underwater environmental monitoring
, 2022 With the growing number of underwater vehicles and devices used for marine environmental monitoring, there is an urgent need for real-time and high-speed underwater wireless communication technologies to transmit huge amounts of data.
Ng, Tien Khee +6 more
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