Results 51 to 60 of about 5,112,732 (131)

A Multi-User Detection Scheme Based on Polar Code Construction in Downlink Underwater Acoustic OFDM Communication System

IEEE Access, 2019
In this paper, we propose a novel polar code construction scheme, suitable for the underwater acoustic (UWA) multi-user communication system using orthogonal frequency division multiplexing (OFDM).
Gang Qiao, Siyu Xing, Feng Zhou
doaj   +1 more source

Simulation of Non-Stationary Mobile Underwater Acoustic Communication Channels Based on a Multi-Scale Time-Varying Multipath Model

Journal of Marine Science and Engineering
Traditional Underwater Acoustic Communication (UAC) typically assumes static or slowly varying channels over short observation periods and models multipath amplitude fluctuations with single-state statistical distributions. However, field measurements in
Honglu Yan, Songzuo Liu, Chenyu Pan, Biao Kuang, Siyu Wang, Gang Qiao   +5 more
doaj   +1 more source

A Blind Side Information Detection Method for Partial Transmitted Sequence Peak-to-Average Power Reduction Scheme in OFDM Underwater Acoustic Communication System

IEEE Access, 2018
In this paper, we propose a blind side information detection scheme for partial transmitted sequence (PTS) peak-to-average power ratio reduction (PAPR) method in underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM) communication ...
Siyu Xing, Gang Qiao, Lu Ma
doaj   +1 more source

Underwater Acoustic simulations with a time variable acoustic propagation model [PDF]

, 2010
The Time Variable Acoustic Propagation Model (TV-APM) was developed to simulate underwater acoustic propagation in time-variable environments. Such environment variability induces a strong Doppler channel spread, which is an important factor to test and ...
Silva, A., Jesus, S. M., Huillery, J., Zabel, F., Rodríguez, O. C.   +4 more
core   +1 more source

Joint Secrecy-Privacy Resource Allocation for UARIS-Assisted Underwater Communications Using Reinforcement Learning

Journal of Marine Science and Engineering
Underwater acoustic communication (UAC) is of great strategic importance for marine resource exploration and security collaboration. However, its open physical nature exposes communication links to severe eavesdropping and localization threats, while ...
Nannan Yang, Da Liu
doaj   +1 more source

Underwater Communications and Networking

, 2012
Journal of Electrical and Computer Engineering, Volume 2012, Issue 1, 2012.
Charalampos C. Tsimenidis, Yuriy Zakharov, Christophe Laot, Konstantinos Pelekanakis, Paolo Casari, Andrey K. Morozov   +5 more
wiley   +1 more source

Relay-Assisted Mixed UAC–FSO System for Oceanic–Terrestrial IoT Networks: Secrecy Analysis and Rate Optimization

IEEE Access
This paper examines the physical layer security (PLS) of a relay-assisted cross-medium system that combines underwater acoustic communication (UAC) and free-space optical (FSO) links for oceanic–terrestrial Internet of Things (IoT) networks ...
Dipti Ranjan Pattanayak, Vishal Narain Saxena, Ankit Garg, Vivek Kumar Dwivedi, Yeon Ho Chung, Ghanshyam Singh   +5 more
doaj   +1 more source

Performance of OFDM-based massive MIMO OTFS systems for underwater acoustic communication

, 2019
In this paper multi-user (MU) underwater acoustic (UWA) communication is investigated using massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM)-based orthogonal time frequency space modulation (OTFS) systems ...
Doufexi, Angela, Bocus, Junaid, Agrafiotis, Dimitris   +2 more
core   +1 more source

Time Synchronization Scheme of Underwater Platforms Using Wireless Acoustic and Optical Communication

, 2022
Publisher Copyright: © 2022 IEEE.Time synchronization in autonomous underwater vehicle (AUV) formations is significant for joint underwater survey tasks.
Matsuda, Takumi, Pajarinen, Joni, Peters, Jan, Weng, Yang, Sekimori, Yuki, Maki, Toshihiro   +5 more
core   +1 more source

Passive acoustic quantification of gas releases

, 2014
The assessment of undersea gas leakages from anthropogenic and natural sources is becoming increasingly important. This includes the detection of gas leaks and the quantification of gas flux. This has applications within oceanography (e.g.
Berges, B.J.P., Tomczyk, M., Leighton, T.G., White, P.R.   +3 more
core   +1 more source