nevtxjustin@gmail.com hath wroth:

>Fortunately bandwidth modeling for WiFi is very easy...when you are a
>professional in the biz.

Ahem. I beg to differ. I've done quite a bit of modeling wireless
data systems for various customers in the past. Strangely, I've never
done a Wi-Fi system as all of them were various proprietary schemes
designed to compensate for the deficiencies of Wi-Fi.

I've looked at Wi-Fi with Mathcad 2000 and had problems because of the
large number of outside influences that are difficult to include. For
example, reflections, interference, multipath, proprietary
enchancements, and creative implimentations, are all common with Wi-Fi
systems. I was interested in simulating various mesh network
topologies, mostly to verify how close test results followed theory.
Mesh adds additional complexity with routing algorthms, geographic
routing, and long range timing problems. Throw in various fading
models for moving clients, and life becomes really complex. I could
ignore all the outside influences in the simulation, but then it
wouldn't resemble reality.

Unfortunately, I may have hit the limits of my abilities with Mathcad.
If I ever get inspired to resurrect the exercise, I may to need an
update to the latest version (13?), a copy of Simulink, and to get
some qualified advice on where I screwed up and on how to continue.
I'm also tempted to switch to MATLAB, which offers a library of models
to plagerize:
"IEEE 802.11a WLAN model"
<http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=3540&objectType=FILE>

"Simulation of an 802.11 Wireless Network"
http://nislab.bu.edu/sc546/sc546Fall...less/index.htm

"802.11b PHY MATLAB Code"
<http://webscripts.softpedia.com/script/Communication-Tools/802-11b-PHY-MATLAB-Code-32206.html>

"Modeling Multpath in 802.11 Systems"
<http://www.commsdesign.com/story/OEG20021008S0001>

Ugh... power going up and down. Later...
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558