基于极化多样性的小型UHF RFID标签旋转传感方法
Polarization-Diversity-Based Rotation Sensing Methodology Using COTS UHF RFID Tags
AI总结:
本文提出了一种利用商用UHF RFID标签和软件定义无线电进行极化多样性旋转传感的方法,通过相位变化计算旋转速度,并验证了系统性能。
摘要:
基于相位的超高频(UHF)无线电频率识别(RFID)传感近年来在物联网(IoT)中取得了许多进展。本文提出了一种利用商用(COTS)UHF RFID标签和软件定义无线电(SDR)UHF RFID读取器进行的极化多样性旋转传感方法。所提出的方法利用完全相干解调后的标签到读取器信息,计算回波负载调制状态的差信号。随后,该序列用于通过时间内的相位变化来计算旋转速度。实验结果用于验证理论模型,并评估所提系统的性能和限制。
英文摘要:
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.
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