long distance wi-fi

Using DSL to wireless Linksys 54g router, want to send this signal a block
and half. Anyone with experience in boosters and yaggi antennas?

cOn Mon, 7 May 2007 17:10:45 -0500, <(E-Mail Removed)>
wrote in <EtN%h.711$(E-Mail Removed)>:

>Using DSL to wireless Linksys 54g router, want to send this signal a block
>and half. Anyone with experience in boosters and yaggi antennas?

Clear line of sight? If not, forget it. If so, forget about boosters
and yagis, and check out dish antennas. See wikis below.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

Dana wrote:

> "John Navas" <(E-Mail Removed)> wrote in message
> news(E-Mail Removed)...
>
>>cOn Mon, 7 May 2007 17:10:45 -0500, <(E-Mail Removed)>
>>wrote in <EtN%h.711$(E-Mail Removed)>:
>>
>>
>>>Using DSL to wireless Linksys 54g router, want to send this signal a block
>>>and half. Anyone with experience in boosters and yaggi antennas?
>>
>>Clear line of sight? If not, forget it.
>
>
> Not really true. As it is dependent on many factors.
>
>
>>If so, forget about boosters
>>and yagis, and check out dish antennas.
>
>
>
Hi,
Visual LOS and radio LOS is two different thing.
And even weather condition can affect signal path.
Ever thought about reflector? If there is a WILL, there will
be a way. My days of doing that sort of experimental thing is over.

"Dana" <(E-Mail Removed)> hath wroth:

>> Clear line of sight? If not, forget it.
>
>Not really true. As it is dependent on many factors.

Really true but not for the obvious reason. NLOS (non-line of sight)
is a problem not because you can't get a connection over the path.
It's a problem becuase you can't maintain a connection over an
obstructed path. Objects inside the Fresnel Zone cause all kinds of
weird reflections, refractions, and blockages. Move anything a few cm
in any direction and the path loss changes. Multipath just rips error
rate because the reflected delayed signal arrives just when the next
indicdent path packet arrives, causing them to clobber each other.

It is possible to do NLOS, but only if you have enough fade margin to
compensate for the huge variations in propagation characteristics, and
the perfect timing needed to deal with the multipath.

Even clear line of sight paths are not good enough for commercial
microwave installations. Many have multiple radios and antennas for
frequency diversity (to avoid frequency selective fadeing) and spacial
diversity (to avoid atmospheric refraction). Of course, the longer
the distance, the worse the problem.

In addition, there's the not so trivial problem of Fresnel Zone
clearance. See:
<http://www.terabeam.com/support/calculations/fresnel-zone.php>
Even a "block and a half" is a problem if the antennas are close to
the ground (i.e. pointed through a window). My guess is that a "block
and a half" is about 1000ft or 0.19 miles. That requires 8.1 ft
radius clearance about the midpoint. That implies that the antennas
on both ends have to be at least 8.1 ft off the ground, or the Fresnel
Zone is going to hit the ground.

However, you're correct. It does depend on many factors, all of which
conspire against NLOS being usable.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

On May 7, 9:21 pm, John Navas <spamfilt...@navasgroup.com> wrote:
> cOn Mon, 7 May 2007 17:10:45 -0500, <john.bumgard...@sbcglobal.net>
> wrote in <EtN%h.711$UU...@newssvr19.news.prodigy.net>:
>
> >Using DSL to wireless Linksys 54g router, want to send this signal a block
> >and half. Anyone with experience in boosters and yaggi antennas?
>
> Clear line of sight? If not, forget it. If so, forget about boosters
> and yagis, and check out dish antennas. See wikis below.
>
> --
> Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
> John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
> Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
> Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

I'm curious how you rule out yagi antennas so quickly, especially
since the length of the block hasn't been defined. My block is only
500ft long. I've done drive-bys with the biquad over that distance,
though not at 11mbps.

"John Navas" <(E-Mail Removed)> wrote in message
news(E-Mail Removed)...
> cOn Mon, 7 May 2007 17:10:45 -0500, <(E-Mail Removed)>
> wrote in <EtN%h.711$(E-Mail Removed)>:
>
>>Using DSL to wireless Linksys 54g router, want to send this signal a block
>>and half. Anyone with experience in boosters and yaggi antennas?
>
> Clear line of sight? If not, forget it.

Not really true. As it is dependent on many factors.

> If so, forget about boosters
> and yagis, and check out dish antennas.

On 8 May 2007 10:47:53 -0700, (E-Mail Removed) wrote in
<(E-Mail Removed) .com>:

>On May 7, 9:21 pm, John Navas <spamfilt...@navasgroup.com> wrote:
>> cOn Mon, 7 May 2007 17:10:45 -0500, <john.bumgard...@sbcglobal.net>
>> wrote in <EtN%h.711$UU...@newssvr19.news.prodigy.net>:
>>
>> >Using DSL to wireless Linksys 54g router, want to send this signal a block
>> >and half. Anyone with experience in boosters and yaggi antennas?
>>
>> Clear line of sight? If not, forget it. If so, forget about boosters
>> and yagis, and check out dish antennas. See wikis below.

>I'm curious how you rule out yagi antennas so quickly, ...

Because they're a PITA. Easier to work with a dish antenna.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>

<(E-Mail Removed)> wrote:
> Using DSL to wireless Linksys 54g router, want to send this signal a
> block and half. Anyone with experience in boosters and yaggi antennas?


I am using a 4 foot long 15db omni and it picks up everything.

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