Phase-Based UHF RFID Tracking With Nonlinear Kalman Filtering and Smoothing

Phase-Based UHF RFID Tracking With Nonlinear Kalman Filtering and Smoothing
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DOI:
10.1109/jsen.2011.2164062
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发表时间:
2012-05
影响因子:
4.3
通讯作者:
Simo Särkkä;Ville Viikari;Miika Huusko;K. Jaakkola
Simo Särkkä;Ville Viikari;Miika Huusko;K. Jaakkola
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Simo Särkkä;Ville Viikari;Miika Huusko;K. Jaakkola

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在本文中,我们提出了一种 UHF RFID 定位跟踪系统,该系统基于在单个载波频率下使用多个空间分布的天线测量 RFID 标签反向散射信号的相位。相位测量的波长模糊度通过使用扩展卡尔曼滤波器 (EKF) 和 Rauch-Tung-Striebel (RTS) 平滑器来解决,其中状态包括天线的位置、速度和相位偏移。使用商用 RFID 读取器在 890 MHz 下对该方法的性能进行了实验验证。
In this paper, we present an UHF RFID location tracking system, which is based on measuring the phases of back scattered signals from RFID tag using multiple spatially distributed antennas at a single carrier frequency. The wavelength ambiguity of the phase measurements is resolved by using the extended Kalman filter (EKF) and the Rauch-Tung-Striebel (RTS) smoother, where the state includes the position, velocity and the phase offsets of antennas. The performance of the method is experimentally verified at 890 MHz using a commercially available RFID reader.