X-Band High Data Rate Trellis Coded 8PSK Transmitter for Earth Observation Satellite Data Transmission

Author(s):  
N. Cartier ◽  
C. Flament ◽  
S. Albinet ◽  
J. Oster ◽  
H. Buret ◽  
...  
2000 ◽  
Author(s):  
C. Boulanger ◽  
L. Lapierre ◽  
F. Gizard ◽  
C. Zanchi ◽  
G. Lesthievent

2005 ◽  
Author(s):  
Takeshi Sasada ◽  
Satoshi Ichikawa ◽  
Toshiki Kanai

Author(s):  
Juergen Butz ◽  
Walter Gross ◽  
Bernd Hespeler ◽  
Volker Lahr ◽  
M. Spinnler
Keyword(s):  

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Shaeista Begum ◽  
Nagaraj B. Patil

AbstractA visible light communication (VLC) provides potential and effective communication paradigm due to the demand of high data-rate applications. VLC networks, consisting of multiple light emitting diodes (LEDs) and it provides the low-cost high data-rate transmission to multiple users simultaneously in indoor environments. VLC has been recently introduced as a secure directional data transmission in vehicle to vehicle to provide an intelligent vehicle control system. However, the performance of this system is mostly affected by the collision of data transmission between different users. In this paper, we introduce an optimal visible light communication (OVLC) network that allows vehicles which have provides collision aware data transmission to improve the chance of transmitting information successively according to the network condition. Firstly, the next forwarding node is selected by the chaotic fish swarm optimization (CFSO) algorithm with the help of vehicle information’s such as intensity of light, the distance and speed of neighboring vehicles. The second contribution is to illustrate the congestion control (CC) system for avoiding extra time due to the control packets exchange process. The optimal result is then forward to the source vehicle equipped device, which helps the driver to make a healthy to control vehicle and efficiently avoid or prevent road accidents under different circumstances. The results show that the proposed OVLC network performs very efficient than existing network in terms of quality metrics, such as throughput, delay, packet loss rate, energy consumption and fairness index.


2020 ◽  
Vol 8 (5) ◽  
pp. 2834-2837

Li-Fi system is a recent and brilliant technology which is utilized visible light as a medium for multimedia data transmission. In Li-Fi communication system, transfers data in the form of light signals as an alternative of Wi-Fi. The Li-Fi technology supports transmission of multimedia data in the way of light particles by sending the multimedia data via LED bulbs that make changes in faster transmission. The Li-Fi with hardware and software model creation with many parameters that must be considered while implementing a Li-Fi based transmission system prototype which is high data rate, distance and the LOS. These parameters are taken for major component when modelling a Light Fidelity system. The main problems in the implementation of an improved data rate at low network coverage and powerless location multi point VLC system and solar component are the range and cost effective model. The VLC source component and destination component must be compatible for high data rate. The conventional lighting technique in communication feels from intrusion and maximum delay possibilities. Solution for the above light based transmission problems in implementation; VLC is a preferred communication model because of its maximum throughput and secure transmission from light particles. The proposed Multi Point Visible Light Communication Li-Fi model provides high-speed communication to achieve better capacity, efficiency, and availability at low network coverage than existing lighting technology


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