On Apr 2, 2008, at 4:00 PM, Martin Langhoff wrote: > On Wed, Apr 2, 2008 at 3:38 PM, <[EMAIL PROTECTED]> wrote: >> the problem with trying to use sound is that it requres a clear >> path from >> the servers to the laptops, something I would not expect to see >> very much. >> it's also very sensitive to the direction the laptops are pointing. > > Absolutely, and the XS doesn't have mics, even less directional > mics ;-)
It's in that hole on the left hand side of the screen... > The 802.11 signal will also have dirty paths in some directions. > Strategic antenna location and signal timing is the only way I can see > this working. It would be fantastic to have a simple thing to demo > physics and maths based on such triangulation. 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... wad _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel