On Wed, 2008-04-02 at 17:05 -0400, John Watlington wrote:
>
> At 2.4 GHz, the interference between multiple paths makes
> signal level measurement pretty useless for determining position.
> If you do this to a number of spatially distributed access points,
> you can improve the estimate... This is how the Bluetooth Location
> service works...
>
Actually, you can do a decent idea of location based on signal strength
*iff* you have a lot of *known* receiving stations and lots of *known*
measurements. Jamey Hicks and Andy Christian at HP's CRL (our lab that
got shutdown upstairs), were able to do quite decently.
But I don't think it is remotely practical for our use.
- Jim
--
Jim Gettys
One Laptop Per Child
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