Abstract
Low-Frequency (LF) Magneto-Inductive (MI) communication, used in LF Radio-Frequency Identification (RFID) systems, is very well suited for indoor positioning applications since LF magnetic fields are not greatly affected by the environment. However, LF magnetic fields may be distorted by ferromagnetic objects or get affected by LF Electromagnetic Interferences (EMI), which affects the accuracy and reliability of LF-RFID based positioning systems. In this paper, we consider an indoor positioning technique based on the LF (125 kHz) MI communication and study the challenges faced by this technique because of ferromagnetic objects. We analyze the results based on experiments and simulations.
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