VOR Base Stations (VORBA)
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.
- Dragoş Niculescu and Badri Nath, "VOR Base Stations
for Indoor 802.11 Positioning", ACM MOBICOM 2004, Philadelphia,
Sept 2004.
(.pdf).
