{"id":229612,"date":"2014-03-27T23:00:00","date_gmt":"2014-03-27T23:00:00","guid":{"rendered":"https:\/\/eenewseurope.artwhere.co\/prototype-de-transmission-lifi-presente-par-le-leti\/"},"modified":"2014-03-27T23:00:00","modified_gmt":"2014-03-27T23:00:00","slug":"prototype-de-transmission-lifi-presente-par-le-leti","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/prototype-de-transmission-lifi-presente-par-le-leti\/","title":{"rendered":"Prototype de transmission LiFi pr\u00e9sent\u00e9 par le Leti"},"content":{"rendered":"

La technologie est basée sur la capacité de modulation à haute fréquence des Led utilisées dans l’éclairage. Que ce soit en éclairage direct ou indirect, le dispositif actuel atteint un taux de transmission de données de 10 Mo\/s sur une distance de trois mètres en utilisant la puissance lumineuse de moins de 1000 lumens de la Led. \n<\/p>\n

Avec la première présentation de ce concept et de son utilisation en communications numérique, le Leti<\/strong> prévoit rapidement des taux de transmission de données au-delà de 100 Mo \/s via l’éclairage par lampes LED, sans altération des performances d’éclairage de la lampe. Très simplement, le système se compose d’une lampe à Led A19 pour l’émetteur et d’une photodiode à avalanche au niveau du récepteur. \n<\/p>\n

Dans le cadre de sa démarche d’écoconception, l’Union européenne a établi un calendrier pour la pénétration de l’éclairage LED (règlement n °. 1194\/2012) qui va aider l’implantation de la technologie Li-Fi. En effet, à l’horizon 2016, dans 30 pays européens, les lampes halogènes seront éliminées et remplacées par des Led. Comme les LED peuvent être modulées à des fréquences élevés, il est possible de transmettre des informations à haut débit dont les oscillations sont invisibles par l’homme. \n<\/p>\n<\/p>\n

D’autres facteurs techniques et commerciaux accroissent l’intérêt pour la transmission des données par la lumière, notamment l’encombrement du spectre de radiofréquences (RF) traditionnel, l’explosion du trafic de données sur les réseaux mobiles et la nécessité de transmettre des données sans fil sans interférence des champs électromagnétiques.<\/p>\n

La présentation de ce prototype, met en évidence l’expertise du Leti dans ce nouveau domaine de transmission des données numériques. Les recherches se concentre aussi sur le développement de composants pour des liaisons bidirectionnelle.<\/p>\n

 <\/p>\n

Visitez le site du CEA-Leti<\/a><\/p>\n

Articles associés sur les ampoules à Led :<\/strong><\/p>\n

STM: gestion d’énergie des Led pour lampadaires<\/a><\/p>\n

Logbar L’anneau magique qui contrôle tout…ou presque <\/a> <\/p>\n

\n<\/p>\n

 <\/p>\n

\n<\/p>\n

<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Au salon Light + Building 2014 \u00e0 Francfort, en Allemagne, le CEA-Leti a pr\u00e9sent\u00e9 son prototype de transmission de donn\u00e9es Li-Fi haut d\u00e9bit sans fil. Cette technologie exploite la modulation haute fr\u00e9quence des Led d’\u00e9clairage. Les d\u00e9bits atteints vont jusqu’\u00e0 10 Mbit\/s \u00e0 une distance de trois m\u00e8tres, ce qui convient au streaming vid\u00e9o HD ou \u00e0 la navigation Internet, avec un flux lumineux inf\u00e9rieur \u00e0 1000 lumens.<\/p>\n","protected":false},"author":22,"featured_media":229613,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[],"domains":[47],"ppma_author":[1149],"class_list":["post-229612","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","domains-electronique-eci"],"acf":[],"yoast_head":"Prototype de transmission LiFi pr\u00e9sent\u00e9 par le Leti ...<\/title>\n<meta name=\"description\" content=\"Au salon Light + Building 2014 \u00e0 Francfort, en Allemagne, le CEA-Leti a pr\u00e9sent\u00e9 son prototype de transmission de donn\u00e9es Li-Fi haut d\u00e9bit sans fil....\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/229612\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prototype de transmission LiFi pr\u00e9sent\u00e9 par le Leti\" \/>\n<meta property=\"og:description\" content=\"Au salon Light + Building 2014 \u00e0 Francfort, en Allemagne, le CEA-Leti a pr\u00e9sent\u00e9 son prototype de transmission de donn\u00e9es Li-Fi haut d\u00e9bit sans fil. 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