Results 61 to 70 of about 5,112,732 (131)

Underwater optical wireless sensor network [PDF]

The thesis details the development of a short range, multi-hop underwater optical wireless sensor network. Multi-hop underwater optical wireless communication using a line of sight (LOS) link can provide a greater range compared to a single hop ...
Ahmad, Zahir Uddin
core  

TIME-VARYING DOPPLER COMPENSATION FOR UNDERWATER ACOUSTIC COMMUNICATION

, 2017
This thesis focuses on time-varying Doppler compensation for underwater acoustic communications using an orthogonal frequency division multiplexing (OFDM) system.
Mirhedayati Roudsari, Seyedhabib
core  

Environment-Independent SNR Measurement Method for Underwater Acoustic Communication Systems

Underwater acoustic communication (UAC) is used as a means of long-range communication for autonomous underwater vehicles (AUVs) and underwater wireless sensor networks (UWSNs).
Shingo Yoshizawa
core   +1 more source

Block-FFT Based OMP for Compressed Channel Estimation in Underwater Acoustic Communications

, 2015
Due to the sparsity in the delay-Doppler domain of the underwater acoustic (UWA) channel, compressed channel estimation (CCE) can effectively reduce the required number of pilots, which is desirable for low bit-rate underwater acoustic communications ...
Yu, Fangyuan, Guo, Qing, Wang, Zhenyong, Xiang, Wei, Wang, Zhenyong, Li, Dezhi   +5 more
core   +1 more source

Reinforcement Learning and Multi-Access Edge Computing for 6G-Based Underwater Wireless Networks

IEEE Access
6G networks are envisioned to dramatically enhance the connectivity landscape by integrating communication across ground, air, and sea environments.
Juan Carlos Cepeda-Pacheco, Mari Carmen Domingo   +1 more
doaj   +1 more source

Performance of the Direct Sequence Spread Spectrum Underwater Acoustic Communication System with Differential Detection in Strong Multipath Propagation Conditions

Archives of Acoustics
The underwater acoustic communication (UAC) operating in very shallow-water should ensure reliable transmission in conditions of strong multipath propagation, significantly disturbing the received signal. One of the techniques to achieve this goal is the
Jan H. SCHMIDT, Iwona KOCHAŃSKA, Aleksander M. SCHMIDT   +2 more
doaj   +1 more source

Channel Estimation for Underwater Acoustic Communications in Impulsive Noise Environments: A Sparse, Robust, and Efficient Alternating Direction Method of Multipliers-Based Approach

Remote Sensing
Channel estimation in Underwater Acoustic Communication (UAC) faces significant challenges due to the non-Gaussian, impulsive noise in ocean environments and the inherent high dimensionality of the estimation task.
Tian Tian, Kunde Yang, Fei-Yun Wu, Ying Zhang   +3 more
doaj   +1 more source

Advanced signal processing techniques for underwater acoustic transmission using steerable transducer arrays [PDF]

The main objective of this research is to design and implement an eight-hydrophone transmitter array for generating bipolar acoustic pulses mimicking those produced by cosmogenic neutrino interaction in sea water.
Ooppakaew, Wichian
core  

A Compact Acoustic Communication Module for Remote Control Underwater [PDF]

, 2015
This paper describes an end-to-end compact acoustic communication system designed for easy integration into remotely controlled underwater operations. The system supports up to 2048 commands that are encoded as 16 bit words.
DelPreto, Joseph Jeff, Katzschmann, Robert Kevin, Rus, Daniela L, MacCurdy, Robert, Joseph DelPreto, Robert Katzschmann, Robert MacCurdy, Daniela Rus   +7 more
core   +1 more source

AUV-Aided Optical-Acoustic Hybrid Data Collection Based on Deep Reinforcement Learning. [PDF]

Sensors (Basel), 2023
Bu F, Luo H, Ma S, Li X, Ruby R, Han G.
europepmc   +1 more source