Slashdot Mirror
DefCon WiFi Distance Competition Calls For Entrants
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."
A klystron is a type of vaccum tube used to generate microwave signals. Good ones can generate very powerfull signals (plenty-o-kilowatts)
Jeroen
Secure messaging: http://quickmsg.vreeken.net/
I assume the "no active relaying" prohibition means that someone can't have waypoint stations to pick up and rebroadcast the signal to the destination. So this leaves the competition open to passive relaying.
:)
How well does the 2.4GHz spectrum interfere with power lines? Would it be possible to put up a structure so that it modulates the power signal which is then decoded on the other end in a similar setup? At the very least, it might win a "Most Creative Bending of the Rules" award or something.
Want to improve your Karma? Instead of "Post Anonymously", try the "Post Humously" option.
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!
That must be one big-ass pringles container. They get that at Costco or something?
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
John Kerry is a Joke!