Covert underwater acoustic communications
The Journal of the Acoustical Society of America, 2010 Low probability of detection (LPD) communications are conducted at a low received signal-to-noise ratio (SNR) to deter eavesdroppers to sense the presence of the transmitted signal. Successful detection at intended receiver heavily relies on the processing gain achieved by employing the direct-sequence spread-spectrum (DSSS) technique.
Jun Ling +4 more
openaire +2 more sources
Channel Emulator Framework for Underwater Acoustic Communications
Applied Sciences, 2023 In this paper, we develop a tractable mathematical model and an emulation framework for communicating information through water using acoustic signals.
Indrakshi Dey, Nicola Marchetti
doaj +1 more source
Re-Evaluation of RF Electromagnetic Communication in Underwater Sensor Networks [PDF]
, 2010 Most underwater wireless networks use acoustic waves as the transmission medium nowadays, but the chances of getting much more out of acoustic modems are quite remote. Optical links are impractical for many underwater applications.
Gordon Dickers +4 more
core +1 more source
Research on Co-Channel Interference Cancellation for Underwater Acoustic MIMO Communications
Remote Sensing, 2022 Multiple-input–multiple-output (MIMO) communication systems utilize multiple transmitters to send different pieces of information in parallel. This offers a promising way to communicate at a high data rate over bandwidth-limited underwater acoustic ...
Yuehai Zhou, Feng Tong, Xiaoyu Yang
doaj +1 more source
A stateless opportunistic routing protocol for underwater sensor networks [PDF]
, 2018 Routing packets in Underwater Sensor Networks (UWSNs) face different challenges, the most notable of which is perhaps how to deal with void communication areas.
Boutaleb, Tuleen +2 more
core +1 more source
An efficient scalable scheduling mac protocol for underwater sensor networks [PDF]
, 2018 Underwater Sensor Networks (UWSNs) utilise acoustic waves with comparatively lower loss and longer range than those of electromagnetic waves. However, energy remains a challenging issue in addition to long latency, high bit error rate, and limited ...
Alfouzan, Faisal +3 more
core +1 more source
Multi-Dimensional Acoustic Cascaded Holographic Encryption with Instantaneous Visual Decryption via Particle Manipulation. [PDF]
Adv Sci (Weinh)Acoustic holograms act as key tools for information encryption, yet current schemes limit encryption dimensionality/security and require time‐consuming decryption. A compact device integrates multi‐dimensional cascaded acoustic holography with particle manipulation, employs extra secret keys, enables rapid decryption, and is validated via 1D/2D/3D ...
Lin Q +8 more
europepmc +2 more sources
Exploring the Parametric Effect in Nonlinear Acoustic Waves
IEEE Access, 2023 Nonlinear acoustics is a critical area of study with practical applications in fields such as underwater communications, medical imaging, non-destructive testing, and sonar.
Maria Campo-Valera +4 more
doaj +1 more source
TS-MUWSN: Time synchronization for mobile underwater sensor networks [PDF]
, 2016 Time synchronization is an important, yet challenging, problem in underwater sensor networks (UWSNs). This challenge can be attributed to: 1) messaging timestamping; 2) node mobility; and 3) Doppler scale effect. To mitigate these problems, we present an
Bouvet, Pierre-jean +2 more
core +2 more sources
Underwater acoustic multiplexing communication by pentamode metasurface [PDF]
Journal of Physics D: Applied Physics, 2021 Abstract As the dominant information carrier in water, the acoustic wave is widely used for underwater detection, communication and imaging. Even though underwater acoustic communication has been greatly improved in the past decades, it still suffers from slow transmission speeds and low information capacity.
Zhaoyong Sun +6 more
openaire +2 more sources