Direction of Arrival Estimation by Phased Arrays in RFID
Direction of Arrival Estimation by Phased Arrays in RFID
复制标题
RFID 中相控阵的到达方向估计
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Rupp
中科院分区：
文献类型：
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作者：
C. Angerer;R. Langwieser;M. Rupp
在本文中，我们提出了一种双接收天线RFID阅读器的到达方向估计。在强视线环境中，利用标签信号的接收阵列的元件上的相移来估计标签的到达方向。然而，在RFID中，接收信号受到强载波泄漏的损害。对每个独立接收天线的接收信号成分进行了建模，并基于该模型给出了相移的确定。建议的接收器上实现的RFID快速原型环境的FPGA。给出了其实现的细节，并在实验评估中通过测量示出，到达方向估计的几个位置的平均平方误差的根是3.3 μ m，具有两个天线。
In this paper we propose a direction of arrival esti- mation for a dual receive antenna RFID reader. In a strong line of sight environment, the phase shift on the elements of a receive ar- ray of the tag signal is utilised to estimate the direction of arrival of the tag. In RFID however, receive signals are impaired by a strong carrier leakage. The receive signal composition at each in- dividual receive antenna is modeled, and based on that model, the phase shift determination is presented. The proposed receiver is implemented on an FPGA of an RFID rapid prototyping environ- ment. Details about its implementation are given, and it is shown in an experimental evaluation by measurement, that the root of the averaged squared error over several position of the direction of arrival estimation is 3.3 ◦ with two antennas.