caa a22 4500 606190023 CHVBK 20210128100853.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10776-015-0278-8 doi (NATIONALLICENCE)springer-10.1007/s10776-015-0278-8 Modeling of the Passive UHF RFID Multipath Channel for Tag Read Region Estimation [Elektronische Daten] [Markus Cremer, Uwe Dettmar, Rainer Kronberger, Anjum Pervez] The estimation of tag read and no-read zones is the most important preliminary planning step in radio-frequency identification (RFID) system installations. Today, in the ultra-high frequency band (UHF: 860-960MHz), this estimation is based on either a free-space or a simplified multipath channel model for the signal propagation in the wireless link between the interrogator and the tag. Using measurements in a standard multipath indoor environment, this paper proves that recent approaches are not able to estimate tag read regions in a given passive UHF RFID system setup with high reliability. A modified multipath channel model is presented, that considers environmental and setup specific properties as well as an arbitrary number of signal paths to achieve a more accurate estimation. It includes the orientation of the tag antenna and the interrogator antenna, their polarizations and their three-dimensional gain patterns, as well as complex reflection coefficients for the reflected signal paths. The presented model equations are ready to use and are implemented into a flexible, easy-to-use, and easy-to-setup simulation environment with low computing times. It predicts the tag read regions separately for the downlink and the uplink and then combines the results for an overall estimation. The comparison of read region simulations and tag readability measurements shows that the our model delivers a 87.2% reliability in the prediction of the tag read regions. The results of the estimation can be used to optimize RFID system setups in a way that read regions are maximized. Springer Science+Business Media New York, 2015 Passive UHF RFID nationallicence Link budgets nationallicence Read regions nationallicence Channel model nationallicence Multipath nationallicence Cremer Markus London South Bank University, London, United Kingdom aut Dettmar Uwe Cologne University of Applied Sciences, Cologne, Germany aut Kronberger Rainer Cologne University of Applied Sciences, Cologne, Germany aut Pervez Anjum London South Bank University, London, United Kingdom aut International Journal of Wireless Information Networks Springer US; http://www.springer-ny.com 22/3(2015-09-01), 188-204 1068-9605 22:3<188 2015 22 10776 https://doi.org/10.1007/s10776-015-0278-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10776-015-0278-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cremer Markus London South Bank University, London, United Kingdom aut NATIONALLICENCE 700 1- Dettmar Uwe Cologne University of Applied Sciences, Cologne, Germany aut NATIONALLICENCE 700 1- Kronberger Rainer Cologne University of Applied Sciences, Cologne, Germany aut NATIONALLICENCE 700 1- Pervez Anjum London South Bank University, London, United Kingdom aut NATIONALLICENCE 773 0- International Journal of Wireless Information Networks Springer US; http://www.springer-ny.com 22/3(2015-09-01), 188-204 1068-9605 22:3<188 2015 22 10776