Results 21 to 30 of about 75,227 (355)

Underwater Accompanying Robot Based on SSDLite Gesture Recognition

Applied Sciences, 2022
Underwater robots are often used in marine exploration and development to assist divers in underwater tasks. However, the underwater robots on the market have some problems, such as only a single function of object detection or tracking, the use of ...
Tingzhuang Liu, Yi Zhu, Kefei Wu, Fei Yuan   +3 more
doaj   +1 more source

An OFDM-Based Frequency Domain Equalization Algorithm for Underwater Acoustic Communication with a High Channel Utilization Rate

Journal of Marine Science and Engineering, 2023
The underwater acoustic communication technique for high-speed and highly reliable information transmission in the ocean has been one of the popular research focuses facing the fast-growing information technology sector and the accelerating development ...
Chengxu Feng, Yasong Luo, Jianqiang Zhang, Houpu Li   +3 more
semanticscholar   +1 more source

Deep-Neural-Network-Based Receiver Design for Downlink Non-Orthogonal Multiple-Access Underwater Acoustic Communication

Journal of Marine Science and Engineering, 2023
The excavation of the ocean has led to the submersion of numerous autonomous vehicles and sensors. Hence, there is a growing need for multi-user underwater acoustic communication. On the other hand, due to the limited bandwidth of the underwater acoustic
H. H. Zuberi, Songzuo Liu, Muhammad Bilal, Ayman Alharbi, Amar Y. Jaffar, Syed Agha Hassnain Mohsan, Abdulaziz Miyajan, Mohsin Abrar Khan   +7 more
semanticscholar   +1 more source

An Image Steganography Algorithm Based on PSO and IWT for Underwater Acoustic Communication

IEEE Access, 2022
To achieve fast and secure information steganography in underwater acoustic channel scenarios, this paper proposes a PSO (Particle Swarm Optimization) and IWT (integer wavelet transform) based image steganography algorithm for underwater acoustic ...
Wenjin Wang, Qingzhong Li
semanticscholar   +1 more source

Reinforcement Learning-Based Adaptive Modulation and Coding for Efficient Underwater Communications

IEEE Access, 2019
In this paper, we propose a reinforcement learning-based adaptive modulation and coding scheme for underwater communications; more specifically, based on the network states such as the quality of service requirement of the sensing message, the previous ...
Wei Su, Jiamin Lin, Keyu Chen, Liang Xiao, Cheng En   +4 more
doaj   +1 more source

Recognition of behavior state of Penaeus vannamei based on passive acoustic technology

Frontiers in Marine Science, 2022
Underwater signal processing based on passive acoustic technology has carried out a lot of research on the behavioral sound of underwater creatures and the protection of marine resources, which proves the feasibility of passive acoustic technology for ...
Maochun Wei, Keyu Chen, Yating Lin, En Cheng   +3 more
doaj   +1 more source

Suppression of effects of Doppler shifts of multipath signals in underwater acoustic communication

Acoustical Science and Technology, 2022
: In underwater acoustic communication, the Doppler shift can severely degrade demodulation performance. In addition, multipath signals can have the Doppler shifts that are different from that of a direct signal. Although conventional signal processing in
Mitsuyasu Deguchi, Y. Kida, T. Shimura
semanticscholar   +1 more source

Underwater Acoustic Communication Receiver Using Deep Belief Network [PDF]

IEEE Transactions on Communications, 2021
Underwater environments create a challenging channel for communications. In this paper, we design a novel receiver system by exploring the machine learning technique–Deep Belief Network (DBN) – to combat the signal distortion caused by the Doppler effect
Abigail Lee-Leon, C. Yuen, Dorien Herremans   +2 more
semanticscholar   +1 more source

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, Hao He, Jian Li, William Roberts, Petre Stoica   +4 more
openaire   +2 more sources

Enhancing underwater sensor network security using QKD-enabled acoustic–optical hybrid communication [PDF]

Sci Rep
Srilekha Rajnarayanan, Tamilarasi Kathirvel Murugan, Logeswari Govindaraj, Smitha Gladius Theodore Solomon, Mohammed Aashik Fazuludeen   +4 more
openalex   +2 more sources