Results 61 to 70 of about 256 (125)

Hybrid Terrestrial -Underwater Optical Communications Link

Diyala Journal of Engineering Sciences
This study presents the design and performance evaluation of a hybrid optical communication system capable of supporting high-rate data transmission across both terrestrial and underwater environments.
Satea Hikmat Alnajjar, Mohammed K. Al-obaidi, Mahmood J Ahmad, Baraa Munqith Albaker   +3 more
doaj   +1 more source

THE PERFORMANCE ANALYSIS OF OPTICAL WAVE PROPAGATION FOR UNDERWATER WIRELESS COMMUNICATION

, 2020
Underwater wireless communications refer to transmitting data in an unguided water environment by wireless carriers including acoustic, radio frequency (RF), and optical waves.
ABDUL LATIFF, NURUL ADILAH, SEVIA MAHDALIZA IDRUS, WAN HASSAN, WAN HAFIZA, FAEZAH JASMAN, MUHAMMAD SAFIY SABRIL, IDRUS, SEVIA MAHDALIZA, WAN HAFIZA WAN HASSAN, JASMAN, FAEZAH, SABRIL, MUHAMMAD SAFIY, NURUL ADILAH ABDUL LATIFF   +9 more
core   +1 more source

Underwater optical wireless communication with subcarrier intensity modulation: an experimental demonstration

, 2021
This paper presents an experimental study of an underwater optical wireless communications system (UOWC). The potential of UOWC and how it can operate alongside acoustic based communications in a hybrid system is outlined. The channel characteristics, in
Geldard, Callum, Wasiu O. Popoola, Popoola, Wasiu O., Guler, Egecan, Hamilton, Alexander, Egecan Guler, Alexander Hamilton, Callum Geldard   +7 more
core   +1 more source

Performance of non-line of sight underwater optical wireless communication links [PDF]

, 2019
Underwater optical wireless communication (UOWC) offers the prospect of higher bandwidths and data rates for underwater communications. However, UOWC systems also suffer from severe absorption and scattering introduced by the underwater channel. They may
Mark S. Leeson, Leeson, Mark S., Al-Amin B. Umar, Umar, A. B.   +3 more
core   +1 more source

LED-to-LED wireless communication between divers

, 2021
For military divers, having a robust, secure, and undetectable wireless communication system available is a fundamental element. Wireless intercoms using acoustic waves are currently used.
Schirripa Spagnolo G., Leccese F.
core   +1 more source

Over 700 MHz –3 dB Bandwidth UOWC System Based on Blue HV-LED With T-Bridge Pre-Equalizer

IEEE Photonics Journal, 2019
To achieve a good balance among the raw modulation bandwidth, the output optical power, and the dynamic swing range, three small GaN-based blue light-emitting diode (LED) cells are cascade interconnected on chip to form a 9 V HV-LED.
Ziying Zhang, Yuanjia Lai, Junlong Lv, Pan Liu, Dongdong Teng, Gang Wang, Lilin Liu   +6 more
doaj   +1 more source

SIMO detection schemes for underwater optical wireless communication under turbulence

, 2015
In underwater optical wireless communication (UOWC), a channel is characterized by abundant scattering/absorption effects and optical turbulence. Most previous studies on UOWC have been limited to scattering/absorption effects.
Xu ZY(徐正元), Yang, Liuqing, Liu, Weihao   +2 more
core  

The Channel Impulse Response of SIMO Underwater Optical Wireless Communication Link based on Monte Carlo Simulation [PDF]

, 2019
In underwater optical wireless communications (UOWC)the channel impulse response is essential in characterizing the link. In this paper we investigate the impulse response of the single input multiple output UOWC link using Monte Carlo simulation for ...
Ghassemlooy, Zabih, Asghar Gholami, Behnaz Majlesein, Gholami, Asghar, Zabih Ghassemlooy, Majlesein, Behnaz   +5 more
core   +1 more source

Coding rate optimization for efficient underwater optical wireless communication

, 2023
In this paper, we analyze the underwater environmental factors that determine the quality of the underwater channel and implement a Deep reinforcement learning (DRL) algorithm to adjust the coding rate using sensor information attached to the marine ...
Kim, Do Young, Shin, Huicheol
core  

Adaptive RIS Optimization for Secure Underwater Optical Communications

IEEE Access
Underwater Optical Wireless Communication (UOWC) systems are subject to significant degradation due to dynamic salinity gradients, temperature variations, and turbulence-induced noise, which distort light propagation and compromise data integrity.
Oliger Veronica Mendoza Betancourt, Delgi Peraza   +1 more
doaj   +1 more source