 
Slidetbone
Mazin Go
Premium
join:2002-11-10
Land O Lakes, FL | Line of sight With a yagi and nothing in between, I am sure it is possible to go even farther.
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ronpin
Imagine Reality
join:2002-12-06
Nirvana | Bit Rate? I don't see the bit rate they attained? | |
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Pope
Premium
join:2001-08-05
Napa, CA | That's great. That's nice, but I still can't get wireless access in my town. Perhaps we need more constructive wireless competitions.
Pope
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It's all good. | Drive Safely, life is a one time thing. | |
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rationale
join:2004-07-27
30323 | How many live out in the desert? How many live out in the desert? I thought so.
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When logic fails. | |
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RFJock
join:2004-01-13
Norfolk, VA
| Good Show! Not 100% sure but believe two of the team are ham radio operators:
Andy Meng - N8MX
Brandon Schamer - KG4NVK
Great fusion of computing technology and RF engineering. Ham radio is not just for folks who want to talk around the world on the radio, there are plenty who do just this type of experimenting with technology fusion. I am quite sure their knowledge of antenna design gleened from amateur radio contributed greatly to the success of this project. Just goes to show the potential for wireless as THE technolgy of choice to bring broadband to rural areas.
Good on ya guys! Keep up the good work. | |
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 | RFJock
join:2004-01-13
Norfolk, VA | Re: Good Show! Add Justin - KC8OIO to that list! | |
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c0
@hp.com
| "...I am quite sure their knowledge of antenna design gleened from amateur radio contributed greatly to the success of this project..."
I thought all you need to know is how long/short the antenna has to be in order to TX/RX at any given frequency..? That doesn't sound like rocket science to me.. I dunno. | |
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Hall
Premium,MVM
join:2000-04-28
Dayton, OH | Just think how far.... Just think how far they could achieve with an amplified signal ?? I think it was one the guy's dad who said they ran out of road and couldn't go farther. | |
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Slidetbone
Mazin Go
Premium
join:2002-11-10
Land O Lakes, FL
| Re: Just think how far.... said by Hall  :
Just think how far they could achieve with an amplified signal ?? I think it was one the guy's dad who said they ran out of road and couldn't go farther.
yeah, but I bet the FCC has the max wattage restricted in that band. Probrably less than 1 watt. | |
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5w WIFI
@207.246.x.x
| Re: Just think how far.... yeah... 300mw is the limit.... im going above that to get high speed interent to my house from a remote location... hehe im gonna run 5w lol... (i own a small tech company and my engineering staff will be helpful with the modifications) BTW i am also a ham radio op but im not gonna give my call sign... since addresses can be found from call signs easly (»www.qrz.com) and i just said i was using a wifi amp... fcc seldom enfoces rules (as much as id like to say they did) but no sense taking chances....
BTW: no i am not in favor of jamming all wifi withing 30 miles of me but since i will be using directional antennas on both ends (obviously) over a VERY rural area the likelyhoood of my causing interferance is smaller than my chance of winning the lottery (and i dont even play!!!!). if theres even one person on 802.11 in the area im talking about ill be supprised and since there are 11 wifi channels im not worried...
73 de ?????? | |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
| Re: I wonder if I could do this in nyc This article says they DID use amplification???
Ben Corrado, Andy Meng, Justin Rigling and a fourth friend, Brandon Schamer (who didn't accompany them from Ohio), won the greatest distance achieved for an 802.11b network. The teens, two of them 18 years old and the other 19 years old, achieved 55.1 miles using homebrewed antennas on both ends along with amplification, exceeding last year's winner by 20 miles. | |
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calvoiper
join:2003-03-31
Belvedere Tiburon, CA
| said by viperm :
This article says they DID use amplification???
Ben Corrado, Andy Meng, Justin Rigling and a fourth friend, Brandon Schamer (who didn't accompany them from Ohio), won the greatest distance achieved for an 802.11b network. The teens, two of them 18 years old and the other 19 years old, achieved 55.1 miles using homebrewed antennas on both ends along with amplification, exceeding last year's winner by 20 miles.
Read the next sentence, for crying out loud:
quote:
Then, when they established that record, they turned off their amplifiers and broke the record for an unamplified connection at the same distance.
I really, really detest short attention spans....
Calvoiper
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VoIP--the death knell of remaining voice monopolies! | |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| Re: I wonder if I could do this in nyc said by calvoiper :
I really, really detest short attention spans....
Calvoiper
OK Jesus, I am sure that You have never made a mistake?:D
A lot of us are pushed for time?. I am one such person. Perhaps the person in question just skimmed the article and missed the "AMP" part?
Why don't we crucify him?;)
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»www.wavecrazy.net | |
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calvoiper
join:2003-03-31
Belvedere Tiburon, CA
| Re: I wonder if I could do this in nyc I too am pushed for time, as are other readers of these forums. That's why it's important to make accurate posts so that some greater number of readers aren't confused or forced to again read the original article.
When you think you are pointing out someone else's mistake, as viperm was, it's that much more important to take extra effort to see that you are correct and you aren't wasting other folk's time.
The main reason I posted was to save other readers from doing what I had to do--go back and read the original article. Yes, I was frustrated by wasting that time, and it was reflected in my post.
Calvoiper
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VoIP--the death knell of remaining voice monopolies! | |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| Re: I wonder if I could do this in nyc said by calvoiper :
The main reason I posted was to save other readers from doing what I had to do--go back and read the original article. Yes, I was frustrated by wasting that time, and it was reflected in my post.
Calvoiper
While I appreciate the fact that Your time is valuable, all of us here make mistakes?, And I thought I would point that out:)
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»www.wavecrazy.net | |
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5w WIFI
@207.246.x.x | nope... to many buildings sturctures in the way... you will be lucky to get 1000ft | |
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NAK
Boot Failure
Premium
join:2000-12-27
Fort Worth, TX
 ·AT&T Southwest
 ·AT&T U-Verse
| Re: I wonder if I could do this in nyc I think it's great, but did they do it legally? I seem to remember there is a radiated power limit...meaning that there is a limit to not only the xmitter power but also the transmit antenna gain. You can get enough gain in a dish or a phased Yagi array that you are required to reduce xmt power to stay legal.
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0001 0101 | |
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Ronnie123
Premium
join:2003-03-11
Springtown, TX
| Re: I wonder if I could do this in nyc The limit for unlicensed 2.4 is 36dbm out the antenna for point to multi-point links.
For point to point links, you can make that quite a bit higher. You start with 30 dbm at the radio and a 6 dbi antenna to get the 36dbm being transmitted. However, in point to point, you can add 3 dbi of gain to the antenna for each one dbm you take off the radio. so if you set the radio to transmit at 24dbm you can add 18 db to the antenna and use a 24 dbi grid, giving you an eirp of 48 dbm.(i am assuming no cable or connector loss between the radio and antenna for simplicity). | |
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russotto
join:2000-10-05
Collegeville, PA
| Brute-force link No advanced knowledge of antenna design was needed here. It was a brute-force "use a bigger dish" link. They used 10' (or 9.5', I've seen both figures quoted) parabolic dishes on either end. The cards they used were 15dBm Orinocos.
Assuming the dishes were 40dBi at WiFi frequencies (a reasonable guess, I think), the link was actually barely within FCC specs -- 15dBm transmit, 0 cable loss (the AP was mounted directly in the dish), 40dBi gain, for an EIRP of 65dBm. Using the 3 for one rule below 1W transmit power (30dBm) means they were allowed an EIRP of 36dBm + 15dBm*2 = 66dBm. So, amazingly, no violation of the FCC power rules.
The calculators at »www.zytrax.com/tech/wireless/calc.htm suggest they had lots of room left, too -- curvature of the earth would be a problem before the signal would fade too much. | |
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55 Mile Wi-Fi Connection
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:D:D
Now, that is a distance.
They've done it again!