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DefCon WiFi Distance Competition Calls For Entrants

Posted by timothy on from the desert-shootout dept.

ASLRulz writes "The Adversarial Science Laboratory is running the Wi-Fi Shootout this year at DefCon and we are inviting people to come out and try to beat last years record of 35 miles. Register here. Hope to see you there."

4 of 74 comments (clear)

  1. Re:Homebrew by Technician · · Score: 5, Informative

    haven't the slightest clue what that mean,

    Do a Google search for klystron.

    You will find it's a vacuum tube. It has a cavity and is used like a magnitron to create microwaves. On most of them, the cavity contains metal bellows. This enables tuning it over a small range. Small ones were used for tuning the local oscillator in radar sets in the receiver. Tuning a 20,000 watt one to the WiFi band could not only disrupt the competition by jamming the band, but could overload and cook much of the low power stuff in the area.

    Maybe he wants to DOS the contest.

    To win the contest, he needs to establish a 2 way link. He can't win by blasting a one way signal.

    --
    The truth shall set you free!
  2. 35 miles?! by flopsy+mopsalon · · Score: 5, Funny

    That must be one big-ass pringles container. They get that at Costco or something?

  3. Not necessarily power limited by elgatozorbas · · Score: 5, Interesting

    Because WIFI operates in the microwave territory, you need a line of sight (LOS). These waves do not go 'around the bend', as e.g. long wave radio does. 'Around the bend' also implies 'around the Earth'. I can imagine that at some point the winners of this contest will no longer be limited by power, but by finding suitable high places to transmit and receive from.

    Z

  4. Other records by john_smith_45678 · · Score: 5, Informative
    A page to collect 'long shots' (sorted by distance). The goal is not (only) to break records, but also to get a feeling of what can be done with what.

    * 82 miles, Utah, using parabolas and amplification (1500 mW) [WWW]Slashdot 10dec2003, [WWW]Rob Flickenger's blog, [WWW]experiment's site
    * 116 km (72 miles), California, using parabolas and amplification ([WWW]Computer World, [WWW]HPWREN)
    * 110 km in Poland ([WWW]Slashdot23sep2003), the [WWW]polish article (one of the [WWW]translations)
    * 70.5 km, Spain, using parabolas ([WWW]CanariaWireless.net)
    * 61.1 km, Downtown Seattle to MtBaldi using 24dBi parabolics, no amps (SeattleWireless)
    * 35.2196 miles, Nevada, USA, using home built horn ([WWW]Defcon Wi-fi Shootout)
    * 52km, Melbourne (Victoria, Australia) [WWW]http://melbourne.wireless.org.au using 25dBi grid pack to 180 degree slotted waveguide.
    * 48 km, Perth (Western Australia), using a [WWW]satellite dish with biquad feed, connecting to a 180 degree waveguide
    * 45.0 km, TacomaNode to MtBaldi using a 14.5dBi yagi and a 24dBi parabolic, no amps (SeattleWireless)
    * 42.0 km, [WWW]Netherlands, SMC-Senao, 2 * 24 dBi dishes (SNR 17 dB)
    * 36.4 km, Belgium, using a SlottedWaveguide, a [WWW]Yagi and a parabola ([WWW]Florenville-Arlon)
    * 33.7 km (20.9 miles), California, using parabolas ([WWW]Oreilly)
    * 26.4 km , Perth (UK) using 10 dBi omni + Parabola 24 dBi (http://www.consume.net/mhonarc/thenet/msg02844.ht ml)
    * 24 km, Lausanne/Switzerland, using 2 Paraolic 24 dBi by [WWW]Submusic Team [WWW]photos and explications (in french)
    * 10 miles (TestingTenMileLink)
    * 15 km, Belgium, using a SlottedWaveguide and a CardboardHorn ([WWW]LouvainWaterloo)
    * 9.5 km, Belgium, using 2 CardboardHorn ([WWW]Liege20020615)
    * 5 km, Belgium using DirectionalWaveguide (tin cans), ([WWW]Liege20020401)
    * 3.5 km, Belgium, using 2 unmodified LinksysWET11
    http://www.seattlewireless.net/index.cgi/LongShots
    --
    John Kerry is a Joke!