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15-Mile Wi-Fi Shot At 4 Mbps Up and Down
DarnComputers writes "5G Wireless (FGWC) announced that it has documented a long distance Wi-Fi shot of 15 miles at a throughput of 4Mbps upload and download speed. The shot was completed this last weekend, in a competitive Wi-Fi shootout at the Defcon convention in Las Vegas, Nev. There were many participants with both commercial-grade and homemade entries in a variety of categories at Defcon's first annual Wi-Fi shootout.http://home.earthlink.net/~wifi-shootout/"
This story was posted last summer. Check the dates on the linked page...
Kindness is the language which the deaf can hear and the blind can see. - Mark Twain
In my house, I'm able to shoot 54Mbps across 15ft of WiFi.
It's not too shabby, and I don't get delayed on the 11Mbps Internet connection like I did before by my 10Mbps LAN card.
I have been pwned because my
Defcon is usually end of summer kinda things... the 2004 Defcon is posted for July 30th - 4th Aug 2004.
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I remember looking at this story a while back - and the same page was linked. might be worth looking back on
That's a good shot, but I have done 10.1, 22.65 and 19.3 mile links, with 99.9% uptime. I used Breezecom DS.11 radios and 24 DBi andrew/conifer antennas to accomplish it. The worst signal strength was -68 to -72 dbm on the 19 mile shot.
It's not something that all that uncommon.
What 16db means in terms of wireless use is than instead of picking up 4 access points from a rooftop using Netstumbler, I saw 40 different access points, including the BAWRN public node over eight miles away (with clear line of sight but an enormous amount of clutter in the fresnel zone).
I used this design from Seattlewireless.net
I strongly recommended trying this as a project. It's easy and pretty cool.
--Pat / zippy@cs.brandeis.edu
No matter what, at least it has to be more legal than the 'key-down showdown' stuff that used to be popular on the CB radios. I saw a guy with a suburban that had like 6 alternators on some custom bracketry, the entire rear cargo area full of batteries, and two large coil antennas on the roof. He claimed that he had a different length of coax on one antenna so that by the time the signal from the rear antenna 'slammed into' (his words) the front antenna would start transmitting and it helped his performance. They usually sit people many miles away and whomever can be heard the loudest wins. Everyone transmits at once I guess. Craziness.
Anyway i'm just wondering what the limits are for dB gain on a certain power level to keep within the legal limits. I have an Andrew 24dB gain dish for 2.4GHz and I wonder if I hooked it to my Lucent card if it would be a legal power level.
Here is a website for homebrew/amateur radio related wireless experimenting. It covers the construction of homebrew amplifiers, antennas, receiving converters, etc. They also have path analysis and line-of-sight analysis CGI utilities.
Green Bay Professional Packet Radio
I'm looking forward to when this kind of technology becomes more mainstream (and cheap).
You will be able to "phone" your nearby friends (usually most of them) by using regular p2p netphone software and a Wi-Fi connection... why limiting to audio? Videomeeting software! Free-of-charge digital communications possible?
Goodbye to those ZIP and CD-Rs and DVD-Rs, now you can upload your work from your home pc directly to your office desktop (maybe companies will have to implement stronger security measures).
On the downside, I can see a new generation of viruses, trojans and worms "in the air".