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1. WO2000042719 - APPARATUS AND METHOD FOR IMPROVED CONNECTIVITY IN WIRELESS OPTICAL COMMUNICATION SYSTEMS

Publication Number WO/2000/042719
Publication Date 20.07.2000
International Application No. PCT/IB1999/000706
International Filing Date 21.04.1999
IPC
H04B 10/11 2013.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
H04L 25/02 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
25Baseband systems
02Details
CPC
H04B 10/11
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
Applicants
  • INTERNATIONAL BUSINESS MACHINES CORPORATION [US/US]; New Orchard Road Armonk, NY 10504, US (AllExceptUS)
  • GFELLER, Fritz [CH/CH]; CH (UsOnly)
  • HIRT, Walter [CH/CH]; CH (UsOnly)
  • INGHAM, Brian, R. [CA/CA]; CA (UsOnly)
Inventors
  • GFELLER, Fritz; CH
  • HIRT, Walter; CH
  • INGHAM, Brian, R.; CA
Agents
  • HEUSCH, Christian; International Business Machines Corporation Säumerstrasse 4 CH-8803 Rüschlikon, CH
Priority Data
99100423.511.01.1999EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) APPARATUS AND METHOD FOR IMPROVED CONNECTIVITY IN WIRELESS OPTICAL COMMUNICATION SYSTEMS
(FR) APPAREIL ET PROCEDE PERMETTANT D'AMELIORER LA CAPACITE DE CONNEXION DANS LES SYSTEMES DE COMMUNICATION A FIBRES OPTIQUES SANS FIL
Abstract
(EN)
The present invention provides an apparatus and a method for improved connectivity in wireless optical networks. Therefore at least two or more receiving units are used which receive an infrared signal and convert it to a digital signal. The digital signals represent data in the form of frames whereby each frame comprises at least a data field and a header field containing a preamble. A selector determines a measure related to the signal-to-noise ratio of the preamble and compares the measures in order to select the best suited signal for further processing.
(FR)
L'invention concerne un appareil et un procédé permettant d'améliorer la capacité de connexion dans les systèmes de communication à fibres optiques sans fil. On utilise à cet effet au moins deux unités de réception qui reçoivent un signal infrarouge et le convertissent en signal numérique. Les signaux numériques représentent des données sous forme de trames, chacun contenant un champ au moins de données et un champ d'en-tête présentant un préambule. Un dispositif de sélection détermine une mesure associée au rapport signal/bruit du préambule et compare les mesures de manière à sélectionner le signal se prêtant le mieux à un traitement ultérieur.
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