RFID Tag Localization With a Sparse Tag Array
RFID Tag Localization With a Sparse Tag Array
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DOI：
10.1109/jiot.2021.3137723
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发表时间：
2022-09
影响因子：
10.6
通讯作者：
Chao Yang;Xuyu Wang;S. Mao
中科院分区：
文献类型：
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作者：
Chao Yang;Xuyu Wang;S. Mao
随着物联网（IoT）的快速发展，射频识别（RFID）技术已被公认为是许多物联网应用的有效且低成本的解决方案。在这篇文章中，我们研究的问题，利用稀疏RFID标签阵列的后向散射室内定位。首先从理论和实验上验证了稀疏标签阵列用于波达方向（DOA）估计的可行性。然后，我们介绍了SparseTag系统，该系统利用一种新型的稀疏标签阵列进行高精度的反向散射室内定位。稀疏标签系统包括稀疏阵列处理、差分协同阵列设计、使用基于空间平滑的方法的DOA估计以及定位方法。采用了一种基于RFID标签阵列的鲁棒信道选择方法来抑制多径效应。SparseTag系统是用商品RFID设备实现的。在两种不同的环境中，通过大量的实验和与基线方案的比较，验证了其上级性能。
With the rapid growth of the Internet of Things (IoT), the radio-frequency identification (RFID) technology has been recognized as an effective and low-cost solution for many IoT applications. In this article, we study the problem of utilizing a sparse RFID tag array for backscatter indoor localization. We first theoretically and experimentally validate the feasibility of using sparse tag arrays for the direction of arrival (DOA) estimation. We then present the SparseTag system, which leverages a novel sparse tag array for high-precision backscatter indoor localization. The SparseTag system includes sparse array processing, difference co-array design, DOA estimation using a spatial smoothing-based method, and a localization method. A robust channel selection method based on the RFID tag array is adopted for mitigating the multipath effect. The SparseTag system is implemented with commodity RFID devices. Its superior performance is validated in two different environments with extensive experiments and comparison to baseline schemes.