Hi Dave,
The WiMax claims for non-LOS performance are based on the use of OFDM
technology and or higher power utilization in licensed spectrum. There
are a lot of good OFDM capable radios out there - Orthogon on the high
end, StarOS with an Atheros card on the low end - that will do some NLOS
connections. Orthogons are especially nice radios - but pricey.
I'm guessing that you could get by with StarOS on a WRAP board with 5Ghz
atheros cards to do some short range urbanLOS if that is what you want
to do.
Matt Larsen
[EMAIL PROTECTED]
Dave Pentecost wrote:
Matt
Thanks for the info. What is your take on the line-of-sight issues?
With little direct experience so far, I am swayed by claims that WiMax
does not have the same requirements for LOS - I will be dealing with
buildings behind buildings.
Thanks
Dave
On 12/12/05, Matt Larsen - Lists <[EMAIL PROTECTED]> wrote:
Hi Dave,
PacWireless (http://www.pacwireless.com) and Tranzeo
(http://www.tranzeo.com) both have an excellent assortment of good
low-cost antennas. I use 2' and 3' dishes from both places for 10 to 60
mile links in the 5Ghz range. They also have good grid antennas for use
in 2.4Ghz and 5Ghz.
Another good way to look for good links is to use the RadioMobile
software (I don't have the address but you can Google for it). It will
tell you whether the links will work or not and what kind of fade margin
to expect. Even off the shelf 802.11a and 802.11b gear will go up to 75
miles in the right conditions. There are many wireless broadband
providers using this to bypass telephone companies everyday.
For more information, check out my blog at http://www.thelar.com/ - I
have a lot more detailed information on how a lot of this stuff works on
there.
Matt Larsen
[EMAIL PROTECTED]
Dave Pentecost wrote:
Matt
I'm working on an urban wireless project, and your post is good
encouragement and information.
Star OS is a good software tip. How about hardware? Antennas are
obviously key to long-distance systems. Do you have any tips based on
your experience?
Thanks
Dave
On 12/11/05, Matt Larsen - Lists <[EMAIL PROTECTED]> wrote:
Forget WiMax and look at using one of the other existing solutions out
there that are either proprietary or WiFi based.
We have done WiFi based links at distances of up to 70 miles on point to
point links and up to 25 miles on point to multipoint links. There are
other nice solutions out there as well. I worked with volunteer groups
in Louisiana after Katrina and we were able to put up broadband networks
quickly and effectively using WiFi and Trango radios
(http://www.trangobroadband.com) way before the government officials and
other groups using WiMax gear.
One good piece of software to enable you to do these things is called
StarOS - http://www.star-os.com/ - this software will let you take a
generic PC and wireless card and turn it into a routing access point and
backhaul all in one. We use this setup to deliver Internet to hundreds
of customers in rural Eastern Wyoming and Western Nebraska.
Good luck!
Matt Larsen
[EMAIL PROTECTED]
J L wrote:
Good day to all,
I am a Peace Corps volunteer serving in the Andes of Peru. I am
looking into the possibility of using WiMax to connect a nearby
community. I am interested in knowing if it is feasible with the
standards still be worked out, and what the standard upfront cost
are. I am also interested in any other ideas to make a connectioin.
I appreciate your advice.
James Tyler Leist
[EMAIL PROTECTED]
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