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Multipath makes a mess of time-of-flight measurements,
Ditto (in spades) for RSSI (aka. "signal strength").

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plus the low-level hardware doesn't necessarily export the information you want.

It pretty much *has to* for the system to work correctly in other ways.

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Researchers working on location with GSM (short example paper) have been using signal strength instead.

That's nice. But those of us who have actually *implemented* working systems just might have done things differently.

Cheers


Edited by mlord (12/01/2007 13:25)