hello, i were wandering if it would be possible to broadcast my 802.11g as far as possible so neighbors could get access to my media server with there standard wifi recivers. i plan on doing this by having a high gain signal for outgoing and sensitive reviver for incoming, boosting range.
also, don’t say its impossible because Ermanno Pietrosemoli and EsLaRed of Venezuela did a wifi connection 382 km (237 mi) in June 2007



Hmmm. I’d hate to say it, but going 382km with wireless G – is impossible under normal circumstances. He may have had a different wireless setup, not “G” mode, like maybe using high powered 900Mhz gear. 900Mhz can, in theory, go hundreds of miles. The issue with that distance is the lag time, and any bridges have to account for the lag.
One could theoretically go 382km with “G” mode if one is in an airplane at 30,000 feet with the proper bridging/router – it’s the line of sight issue that kills any long distance over land. You have to be thousands of feet in the air to be able to see a hundred miles… Mind you, if one site is up on a mountain at 15,000 feet, and you have clear line of sight out over an ocean, you may, just may make a link that long. “Normal” people, with “normal” gear in “normal” situations cannot send wireless “G” 382 km, it is impossible.
Anyway, to get back to your question – if your neighbors have line of sight to your house, you could put up an external antenna (omnidirectional) and let people connect to that. Having the access point integrated into the antenna will help with the signal in both directions.
Yes you probably CAN reach to your neighborhood. They may need to also get better antennas in order to receive the signal however.
The Venezuela record was a mountain to mountain connection with very high gain, very directional, dish antennas on each end! http://www.engadget.com/2007/06/19/venezuelans-set-new-wifi-distance-record-237-miles/
There are systems that allow city wide, campus wide, wifi. Many use a mesh network composed of several access points located at different locations which create a “blanket” area coverage. Check out “OpenMesh” for some better details. http://openmesh.com
A central outdoor transmitter/reciever with a good gain antenna can indeed cover a couple of blocks (normal city blocks) and still be legal. There are distributors which carry specialized (not your local linksys, dlink, etc) systems which can deliver very good range. Check Moon Blink, http://www.moonblinkwifi.com/ or Streakwave http://www.streakwave.com/ or Defacto Wireless
http://defactowireless.com/ to find equipment that does what you are asking.