Performance of LED for line-of-sight (LoS) underwater wireless optical communication system

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Alaa G. Nasser ◽  
Mazin Ali A. Ali
Keyword(s):  
Optical Communication ◽  
Link Quality ◽  
Line Of Sight ◽  
Modulation Scheme ◽  
Underwater Communication ◽  
Optical Communication System ◽  
High Data ◽  
Wireless Optical Communication ◽  
Noise Rate ◽  
Wireless Optical Communications

AbstractUnderwater wireless optical communications (UWOC) recently emerge as a solution to the problem of underwater communication for link with a high data rate, low delay, safety, and high immunity. In this study, the line of sight (LoS) method based on LED used for UWOC with different modulation schemes. The bit error rate (BER), signal-to-noise rate, and quality factor are used for assessing system performance and link quality. Besides the effect of transmitting angle, distance link (d), and transmitting power (PT) are analysed. Results show that 8-pulse position modulation (PPM) is the best modulation scheme for achieving a good link in the LoS method.

scholarly journals Design of Low Power Hybrid Communication Model

2021 ◽  
Author(s):  
Menaka D ◽  
Sabitha Gauni ◽  
Manimegalai C.T ◽  
Kalimuthu K
Keyword(s):  
Optical Communication ◽  
Data Transmission ◽  
Weather Conditions ◽  
Communication Model ◽  
Underwater Communication ◽  
Long Distance ◽  
Weather Forecasts ◽  
High Data ◽  
Military Equipment ◽  
Wireless Optical Communication

Abstract Communication in underwater is a growing research topic that plays a big role in forecasting accurate weather conditions. In which Acoustic communication is the upcoming technology well qualified for its long-distance underwater communication with certain restrictions like low data rate and high latency. To overcome this constrain wireless optical communication are preferred for high data transmission and less delay. The attempts are made to analyze the performance of the turbid and coastal water conditions.To improve the underwater communication model,a hybrid model is proposed for the applications like weather forecasts, military equipment, and missing debris.

Pulse-Position-width Modulation Scheme in Wireless Optical Communication System

2008 ◽  
Vol 35 (12) ◽  
pp. 1883-1887 ◽  
Author(s):  
樊养余 Fan Yangyu ◽  
白勃 Bai Bo ◽  
黄爱萍 Huang Aiping ◽  
田骅 Tian Hua ◽  
李龙 Li Long ◽  
...  
Keyword(s):  
Optical Communication ◽  
Communication System ◽  
Modulation Scheme ◽  
Optical Communication System ◽  
Wireless Optical Communication

Underwater wireless optical communication: a case study of chlorophyll effect

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Haitham Mawlood Mikhlif ◽  
Mazin Ali A. Ali ◽  
Zeyad A. Saleh
Keyword(s):  
Optical Communication ◽  
Fluorescence Spectra ◽  
Signal To Noise Ratio ◽  
Link Quality ◽  
Optical Communication System ◽  
Absorption And Fluorescence Spectra ◽  
Peak Voltage ◽  
Wireless Optical Communication ◽  
Received Power

Abstract In this paper, a system was designed to simulate the study and analyze the effect of chlorophyll on the underwater wireless optical communication system. Chlorophyll was extracted and characterized by measuring absorption and fluorescence spectra, the performance of system was observed by mixing various volumes added to water. The optical beam was modulated at different frequencies by the frequency shift key, once through clean water and once through water mixed with chlorophyll and different metrics such as received power (P r ), attenuation coefficient (α), peak-to-peak voltage (V p-p), voltage gain (A v ), and signal-to-noise ratio were measured to assess the performance of the system. The results refer that the system exhibits a good link quality to the received frequencies under different conditions.

Efficient Optical Localization for Mobile Robots via Kalman Filtering-Based Location Prediction

2016 ◽  
Author(s):  
Jason N. Greenberg ◽  
Xiaobo Tan
Keyword(s):  
Kalman Filter ◽  
Kalman Filtering ◽  
Mobile Agent ◽  
Optical Communication ◽  
Line Of Sight ◽  
Location Prediction ◽  
Two Dimensional ◽  
Optical Communication System ◽  
Search Range ◽  
Simulation Results

Localization and communication are both essential functionalities of any practical mobile sensor network. Achieving both capabilities through a single Simultaneous Localization And Communication (SLAC) would greatly reduce the complexity of system implementation. In this paper a technique for localizing a mobile agent using the line of sight (LOS) detection of an LED-based optical communication system is proposed. Specifically, in a two-dimensional (2D) setting, the lines of sight between a mobile robot and two base nodes enable the latter to acquire bearing information of the robot and compute its location. However, due to the mobile nature of the robot, establishing its LOS with the base nodes would require extensive scan for all parties, severely limiting the temporal resolution and spatial precision of the localization. We propose the use of a Kalman filter to predict the position of the robot based on past localization results, which allows the nodes to significantly reduce the search range in establishing LOS. Simulation results and preliminary experimental results are presented to illustrate and support the proposed approach.

Sign in / Sign up

Export Citation Format

Share Document