Results 41 to 50 of about 1,078 (202)

A First Implementation of Underwater Communications in Raw Water Using the 433 MHz Frequency Combined with a Bowtie Antenna

Sensors, 2019
In 2016, there were 317 serious water pollution incidents in the UK, with 78,000 locations where businesses discharge controlled quantities of pollutants into rivers; therefore, continuous monitoring is vital. Since 1998, the environment agency has taken
Samuel Ryecroft, Andrew Shaw, Paul Fergus, Patryk Kot, Khalid Hashim, Adam Moody, Laura Conway   +6 more
doaj   +1 more source

Channel Polarization Scheme for Ocean Turbulence Channels in Underwater Visible Light Communication

Journal of Marine Science and Engineering, 2023
Underwater wireless communication technology plays an important role in marine environment monitoring and ecological protection. Underwater optical wireless communications (UWOCs) can currently achieve a transmission distance of hundreds of meters, and ...
Xiaoji Li, Leiming Sun, Jiemei Huang, Fanze Zeng   +3 more
doaj   +1 more source

Investigation of Underwater Optical Wireless Communications with Turbulence [PDF]

, 2018
Turbulence is due to the random variations of the refractive index of the medium (in this case water), which leads to fluctuation or fading of the received light intensity. In wireless communications including underwater optical wireless communications the link performance is greatly affected.
Vali, Zahra, Gholami, Asghar, Ghassemlooy, Zabih, Omoomi, Masood   +3 more
openaire   +1 more source

Effect of the APD Receiver’s Tilted Angle on Channel Capacity for Underwater Wireless Optical Communications

, 2021
This paper focuses on investigating the effect of the receiver’s tilted angle on the channel capacity of an underwater wireless optical communication (UWOC) system, in which an avalanche photodiode (APD) detector is adopted as the receiver. Under the non-
Meiyan Ju, Guoping Tan, Hongqiang Shi, Yueheng Li, Ping Huang   +4 more
core   +1 more source

Towards Ultra-Reliable Low-Latency Underwater Optical Wireless Communications

, 2019
The superiority of optical communications in underwater mediums, in terms of higher data rate and reliability, makes underwater optical wireless communications (UOWC) more favorable to provide ultra-reliable low-latency underwater communications, as ...
Al-Naffouri, Tareq Y., Alouini, Mohamed Slim, Dahrouj, Hayssam, Alghamdi, Rawan, Saeed, Nasir   +4 more
core   +2 more sources

Laser-based visible light communications and underwater wireless optical communications: a device perspective

, 2019
High-speed visible light communications (VLC) has been identified at an essential part of communication technology for 5G network. VLC offers the unique advantages of unregulated and secure channels, free of EM interference.
Alkhazragi,Omar, Ng, Tien Khee, Ooi, Boon S., Sun, Xiaobin, Guo, Yujian, Shen, Chao   +5 more
core   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Angular MIMO for Underwater Wireless Optical Communications: Link Modelling and Tracking

, 2021
International audienceAngular imaging multiple-input/multiple-output (A-MIMO) is investigated for short-range, highspeed underwater wireless optical communications (UWOCs) where, unlike conventional imaging MIMO (C-MIMO), data are transmitted in an angle
Ghazy, Abdallah S., Khalighi, Mohammad Ali, Hranilovic, Steve   +2 more
core   +1 more source

Multi-Degree-of-Freedom for Underwater Optical Wireless Communication with Improved Transmission Performance

Journal of Marine Science and Engineering, 2022
Underwater optical wireless communication (UOWC) has great potential to provide high-speed and intensive communications over short ranges underwater. However, the mobility of the UOWC system is limited by the strict alignment requirements between the ...
Anliang Liu, Ruolin Zhang, Bin Lin, Hongxi Yin   +3 more
doaj   +1 more source

Guiding and Manipulating Light Fields in Microstructured Liquid Crystals

Advanced Physics Research, EarlyView.
This review summarizes recent advances in guided‐wave optics enabled by microstructured liquid crystal (LC) devices, covering their fundamental material properties, key degree of freedom for dynamic light field manipulations. The advances of linear guided‐wave optics, nonlinear‐optics with spatial optical solitons, and microlasers in LC‐based devices ...
Shan‐shan Chang, Yong‐shuai Li, Jin‐hui Chen   +2 more
wiley   +1 more source