Performance Analysis of Code Coupling on Long Distance High Bandwidth Network

Author(s):  
Yvon Jégou
2009 ◽  
Vol 31 (10) ◽  
pp. 1679-1686 ◽  
Author(s):  
Yong-Mao REN ◽  
Gang QIN ◽  
Hai-Na TANG ◽  
Jun LI ◽  
Hua-Lin QIAN

Author(s):  
Simone Maier ◽  
Heinz Schlesinger ◽  
Wolfgang Templ ◽  
Harish Viswanathan

2018 ◽  
Vol 16 (36) ◽  
pp. 104-112
Author(s):  
Abdullah A. Abdullah

Light has already becomes a popular means of communication, and the high-bandwidth data into free space without the use of wires. A great idea took us to design a new system for transmitting sound through free space at (650, 532) nm wavelengths using reflective mirrors under different atmospheric conditions. The study showed us the effect of various weather factors (temperature, wind speed and humidity) on these wavelengths for different distances. As well as studying the attenuation caused by long-distance laser and beam divergence, A reflective dish was used to focus the spot of the laser beam on the photocell. Results were discussed under the effect of these factors and the attenuation resulting from the beam divergence. Thus, the system performance can be improved for range and the quantity transfer data by increasing transmitted power and reducing the divergence of the laser beam.


Energy ◽  
2022 ◽  
Vol 243 ◽  
pp. 123125
Author(s):  
Pengbo Dou ◽  
Teng Jia ◽  
Peng Chu ◽  
Yanjun Dai ◽  
Chunhui Shou

Author(s):  
Alexandre Immas ◽  
Mohsen Saadat ◽  
Jesus Navarro ◽  
Matthew Drake ◽  
Julie Shen ◽  
...  

Abstract We present a new method for underwater wireless communication with high bandwidth and over long distance. A swarm of Autonomous Underwater Vehicles (AUVs) is used to relay an optical signal between two points at any distance. Each vehicle is equipped with multiple attitude stabilization systems to reach the required pointing and tracking accuracy for optical communication. This technology would enable fast and efficient underwater exploration which is highly needed as only 5% of the world’s oceans have been explored so far. We carried out an experimental proof of concept to show that it is possible to relay an optical signal underwater between two points using a swarm of AUVs. The experiment took place in a 2m deep water tank. We modified and controlled two submarine models to reflect the laser beam stemming from a laser pointer at the bottom of the tank to the desired location. To know their positions, we developed an image processing technique which required the setup of a RF communication link at 315Mhz between the computers processing the camera’s videos and the units.


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