VOR base stations for indoor 802.11 positioning
by Dragos Niculescu, Badri Nath
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| url: | http://portal.acm.org/citation.cfm?id=1023727 | | abstract: | Angle of arrival (AOA) has previously been used for outdoor
positioning in aircraft navigation and for services like
E911. For indoor positioning, the best schemes to date rely
either on extensive infrastructure, or on sampling of the signal
strength on a dense grid, which is subject to changes
in the environment, like furniture, elevators, or people. We
present an indoor positioning architecture that does not require
a signal strength map, simply requiring the placement
of special VOR base stations (VORBA). While our incipient
realization of the AOA using 802.11 uses a base station with
a revolving directional antenna, a non mechanical implementation
would yield comparable performance, even with quantized
angles. Performance of positioning with VOR base stations
is evaluated though experimentation, simulation, and
theoretical analysis. |
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