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Talks and Poster Presentations (with Proceedings-Entry):

S. Grebien, F. Galler, D. Neunteufel, U. Mühlmann, S. Maier, H. Arthaber, K. Witrisal:
"Experimental Evaluation of a UHF-MIMO RFIDSystem for Positioning in Multipath Channels";
Talk: IEEE RFID-TA 2019, Pisa, Italy; 09-25-2019 - 09-27-2019; in: "2019 IEEE International Conference on RFID Technology and Applications (RFID-TA)", (2019), ISBN: 978-1-7281-0589-5; 95 - 100.



English abstract:
This paper presents an experimental evaluation of an ultra-high-frequency (UHF) multiple-input-multiple-output (MIMO) radio-frequency identification (RFID) system for po-sitioning. To this end, we propose a set of novel parametric maximum likelihood direct-positioning algorithms capable of exploiting the coherent measurements performed by closely-spaced antennas and simultaneously exploiting the non-coherent measurements by widely-spaced antennas. The radio channel indoors for relatively small bandwidth can be characterized by a line-of-sight component plus a multitude of so-called dense multipath components (DMC). The proposed algorithm framework is able to consider the DMC, enabling more accurate positioning. We present an experimental RFID testbed, capable of performing wideband measurements up to 50 MHz bandwidth. This testbed is able to query the RFID tag at the UHF band while performing the position measurements in the 2.45 GHz band, supporting such wideband signal transmission. A dual-frequency RFID tag is presented, equipped with two antennas, scattering back synchronously at the UHF and 2.45 GHz bands. Utilizing the experimental UHF-MIMO RFID testbed we show that 80 % of the position errors are smaller 0.15 m if the DMC process is included in the algorithm.

Created from the Publication Database of the Vienna University of Technology.