Results 211 to 220 of about 873,936 (270)
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IEEE Wireless Communications Letters
This letter proposes a learned denoising-based sparse adaptive channel estimation method in the delay-Doppler domain for time-varying underwater acoustic (UWA) channels in an orthogonal time-frequency space (OTFS) system.
Lianyou Jing +3 more
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This letter proposes a learned denoising-based sparse adaptive channel estimation method in the delay-Doppler domain for time-varying underwater acoustic (UWA) channels in an orthogonal time-frequency space (OTFS) system.
Lianyou Jing +3 more
semanticscholar +1 more source
Underwater Wireless Optical Communications: From the Lab Tank to the Real Sea
Optical Fiber Communications Conference and ExhibitionThis paper introduces the recent progress of underwater wireless optical communications (UWOC). Studies in channel dynamics and link alignment issues contribute to the mature applications of UWOC in real sea environments. © 2024 The Author(s)
Jing Xu, Yufan Zhang, C. Cai
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Doppler Estimation and Correction for JANUS Underwater Communications
Global Communications Conference, 2020In recent years, underwater communications have seen a growing interest pushed by marine research, oceanography, marine commercial operations, offshore oil industry and defense applications. Generally, underwater communications employ audio signals which
Concetta Baldone +4 more
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IEEE Transactions on Communications
Underwater covert communication (UCC) technology can prevent legitimate transmission from being intercepted upon by potential eavesdroppers while ensuring a certain rate at the receiver under the condition of underwater acoustic channels.
Jianrui Chen +5 more
semanticscholar +1 more source
Underwater covert communication (UCC) technology can prevent legitimate transmission from being intercepted upon by potential eavesdroppers while ensuring a certain rate at the receiver under the condition of underwater acoustic channels.
Jianrui Chen +5 more
semanticscholar +1 more source
The Journal of the Acoustical Society of America, 1956
To test several types of voice and code signals, communication was carried on over the conventional submarine underwater telephone between two submerged submarines. The signals included normal speech, differentiated and clipped speech, quarter-speed speech, and multiple-tone Morse code.
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To test several types of voice and code signals, communication was carried on over the conventional submarine underwater telephone between two submerged submarines. The signals included normal speech, differentiated and clipped speech, quarter-speed speech, and multiple-tone Morse code.
openaire +1 more source
A Kalman-based Doppler tracking algorithm for underwater acoustic spread spectrum communications
Applied Acoustics, 2022This paper investigates a method that dynamically tracks and compensates the Doppler spread of the spread spectrum signal in underwater acoustic communications.
Dajun Sun, Xiaoping Hong, Hongyu Cui
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Joint Bayesian Channel Estimation and Data Detection for Underwater Acoustic Communications
IEEE Transactions on CommunicationsThis paper proposes a joint multi-task Bayesian channel estimation and data detection algorithm for Turbo equalization (TEQ) in underwater acoustic (UWA) communication.
Yaokun Liang +5 more
semanticscholar +1 more source
Machine Learning for Underwater Acoustic Communications
IEEE wireless communications, 2022Energy-efficient and link-reliable underwater acoustic communication (UAC) systems are of vital importance to both marine scientific research and oceanic resource exploration.
Lihuan Huang +5 more
semanticscholar +1 more source
Performance of Vertical Underwater Wireless Optical Communications With Cascaded Layered Modeling
IEEE Transactions on Vehicular Technology, 2022This paper investigates the performance of vertical underwater wireless optical communication (UWOC) systems in the presence of air bubbles and temperature gradients.
Yi Lou +3 more
semanticscholar +1 more source
Loop antennas for underwater communications
12th European Conference on Antennas and Propagation (EuCAP 2018), 2018In this paper, the performances of circular loop antennas for underwater communication, designed to work both in freshwater and seawater, are analyzed. Firstly, the attenuation and wavelength in both environments are evaluated with the goal of selecting the proper working frequencies, that are supposed to be 433.92 MHz in freshwater and 10 kHz in ...
Andrea Massaccesi, Paola Pirinoli
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