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Kusy B., Sallai J., Balogh G., Ledeczi A., Protopopescu V., Tolliver J., DeNap F., Parang M., Radio Interferometric Tracking of Mobile Wireless Nodes, MobiSys(2007).
Abstract:
Location-awareness is an important requirement for many
mobile wireless applications today. When GPS is not applicable
because of the required precision and/or the resource
constraints on the hardware platform, radio interferometric
ranging may offer an alternative. In this paper, we present a
technique that enables the precise tracking of multiple wireless
nodes simultaneously. It relies on multiple infrastructure
nodes deployed at known locations measuring the position
of tracked mobile nodes using radio interferometry. In
addition to location information, the approach also provides
node velocity estimates by measuring the Doppler shift of
the interference signal. The performance of the technique is
evaluated using a prototype implementation on mote-class
wireless sensor nodes. Finally, a possible application scenario
of dirty bomb detection in a football stadium is briefly
described.
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