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A Simple Ranging System Based on Mutually Coupled Resonating Circuits
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DOI：10.1109/TIM.2014.2298174.png)
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Abstract
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In this paper, a ranging technique based on inductive coupling between resonating coils is presented. By exploiting resonance, both a high range and high signal-to-noise ratio at the receiver are achieved. The theoretical background is discussed; a theoretical model is presented; and a practical implementation is illustrated and experimentally validated. It is shown that the proposed technique, implemented using off-the-shelf components, is only moderately sensitive to the effect of conductive objects placed close to the receiver, whereas it proves its effectiveness in an ordinary laboratory setup, achieving a maximum error of <3 cm over a 5.8-m range. It is thus suitable for indoor positioning applications.
Keywords:
Indoor ranging
inductive coupling
positioning
resonance
wire loop antennas
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