• Country
• Australia

• Manufacturer / Brand
• CSIRO Division of Radiophysics, Epping, New South Wales

• Year
• 1992

• Category
• Commercial Transmitter & Receiver (TRX not Amateur)

• Radiomuseum.org ID
• 294031

Click on the schematic thumbnail to request the schematic as a free document.

• Main principle
• Transceiver

• Wave bands
• Internet Streaming

• from Radiomuseum.org
• Model: Wi-Fi Transceiver - CSIRO Division of Radiophysics

• Notes

• 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.

• Author
• Model page created by Gary Cowans. See "Data change" for further contributors.

• Other Models

• Here you find 2 models, 2 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from CSIRO Division of Radiophysics, Epping, New South Wales