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This paper presents a 2-D localization system for passive UHF RFID tags on the basis of analysis of backscattered transponder signals. The maximum likelihood position estimator we introduce combines inherently phase and amplitude evaluation, thus enabling accurate and robust localization. A MIMO system in which, sequentially, each frontend is configured to work as a transmitter while the remaining...
This paper introduces a 2D localization system for passive UHF RFID tags based on phase evaluation of the backscattered transponder signals. To increase the accuracy and robustness of the position estimates an inverse synthetic aperture radar approach is performed. A MIMO system where paths take turns to act as transmitter with the remaining paths serving as receivers, is used to enable the position...
This paper introduces a novel 2D localization system for passive UHF RFID tags based on phase-of-arrival evaluation of the backscattered tag signal received by several antennas. To improve localization accuracy and reduce disturbances caused by multipath propagation, we employ a frequency-stepped continuous waveform approach. To achieve proof of concept, a local position measurement system demonstrator...
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