Polarization-Diversity-Based Rotation Sensing Methodology Using COTS UHF RFID Tags
Abstract
Phase-based sensing using ultra-high frequency (UHF) radio-frequency identification (RFID) has, in recent years, yielded numerous additions to the Internet of Things (IoT). This work presents a polarization diversity-based rotation sensing methodology using common-off-the-shelf (COTS) UHF RFID tags identified with a software-defined radio (SDR) UHF RFID reader. The proposed methodology uses the tag-to-reader message after fully coherent demodulation to calculate a difference signal of the backscatter load modulation states. This sequence is then used to compute the rotation speed by evaluating its phase change over time. Experimental results are used to validate the theoretical model and to evaluate the performance and limitations of the proposed system.
Keywords
Cite
@article{arxiv.2512.08069,
title = {Polarization-Diversity-Based Rotation Sensing Methodology Using COTS UHF RFID Tags},
author = {Florian Muralter and Fabian Muralter and Hugo Landaluce and Asier Perallos},
journal= {arXiv preprint arXiv:2512.08069},
year = {2025}
}