Single-Anchor Localization in Inductively Coupled Sensor Networks Using Passive Relays and Load Switching


Eric Slottke and Armin Wittneben


Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, Nov. 2015.

DOI: 10.1109/ACSSC.2015.7421116

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Wireless physical layers based on inductive coupling are receiving a lot of attention in the context of RFID systems and more recently sensor networks and near field communication. We consider for the first time the localization of a passive agent node based on a single impedance measurement at a single anchor. To this end we propose using passive relay nodes to resolve the associated problem of localization ambiguity and show that load switching at these nodes vastly improves localization accuracy. Numerical results for random networks indicate that a median localization error in the sub-mm range is possible under realistic conditions.

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