Wi-Fi Transceiver

CSIRO Division of Radiophysics, Epping, New South Wales

Données
Forum
Images
Collections

  • Année
  • 1992
  • Catégorie
  • Emetteur / récepteur commercial (TRX non amateur)
  • Radiomuseum.org ID
  • 294031

Cliquez sur la vignette du schéma pour le demander en tant que document gratuit.

 Spécifications techniques

  • Principe général
  • Transceiver (poste récepteur/émetteur combiné)
  • Gammes d'ondes
  • Radio / streaming internet
  • De Radiomuseum.org
  • Modèle: Wi-Fi Transceiver - CSIRO Division of Radiophysics
  • Remarques

  • The CSIRO invented a wireless a peer-to-peer wireless LAN transceiver based on specification 802.11 which enabled Wi-Fi technology to transmit at much higher speeds than previously available.

    This enabled a method of transmitting data, all of which are capable of operating at frequencies in excess of 10 GHz and in multipath transmission environments. This is achieved by a combination of techniques which enable adequate performance in the presence of multipath transmission paths where the reciprocal of the information bit rate of the transmission is short relative to the time delay differences between significant ones of the multipath transmission paths.

    The concept which allowed the CSIRO team to split signals into smaller components and then recombine them at the receiver is drawn on an algorithm called Fast Fourier Transforms. The CSIRO did not invent FFT, but were responsible for the method of using FFT to send and receive signals.

    The development team from the CSIRO team consisted of radio astronomers Diet Ostry, Graham Daniels, John Deane, Terry Percival and John O’Sullivan.

    US Patent US5487069 A, was awarded in June 1996.

    Products using the 802.11 technology, which relied on the CSIRO’s work, started to enter the market in 2001. The first unlicensed products began to appear in 2002.

    In 2007, the CSIRO had a major win in a Texas court. The judge found that CSIRO had grounds for an injunction to bar an infringing company from selling its products. The decision was upheld in further court action.

    The litigation continued for years, and involved large companies including Hewlett Packard, Sony, Lenovo and Acer.

    In 2012, the CSIRO settled with a number of companies for a sum of $220 million.

  • Auteur
  • Modèle crée par Gary Cowans. Voir les propositions de modification pour les contributeurs supplémentaires.

 Collections | Musées | Littérature

 Forum