Abstract
The Global Positioning System (GPS) has been widely applied in outdoor positioning, but it cannot meet the accuracy requirements of indoor positioning. Comprising an important part of the Internet of Things perception layer, Radio Frequency Identification (RFID) plays an important role in indoor positioning. We propose a novel localization scheme aiming at the defects of existing RFID localization technology in localization accuracy and deployment cost, called ANTspin: Efficient Absolute Localization Method of RFID Tags via Spinning Antenna, which introduces a rotary table in the experiment. The reader antenna is fixed on the rotary table to continuously collect dynamic data. When compared with static acquisition, there is more information for localization. After that, the relative incident angle and distance between tags and the antenna can be analyzed for localization with characteristics of Received Signal Strength Indication (RSSI) data. We implement ANTspin using COTS RFID devices and the experimental results show that it achieves a mean accuracy of 9.34 cm in 2D and mean accuracy of 13.01 cm in three-dimensions (3D) with high efficiency and low deployment cost.
Highlights
Global Positioning System (GPS) has achieved fruitful results in outdoor positioning, which can achieve high localization accuracy and it is widely applied in map navigation [1]
We proposed ANTspin: Efficient Absolute Localization Method of Radio Frequency Identification (RFID) Tags via the Spinning Antenna, which introduces a rotating table in the experiment
Relative Localization: Shangguan et al [18] proposed the first study of relative localization, called ‘Spatial-Temporal Phase Profiling-Based Method for Relative RFID Tag Localization (STPP)’, based on the Otrack [19]
Summary
Global Positioning System (GPS) has achieved fruitful results in outdoor positioning, which can achieve high localization accuracy and it is widely applied in map navigation [1]. The current use of RFID technology to build indoor positioning systems has great advantages. Most of them collect data from a number of static antennas in fixed positions, which results in the high deployment cost in antennas. Some schemes use the rotating table, place the antenna on the edge and collect data during the rotation process. This saves antenna costs, but it requires a relatively large rotating table, which is inconvenient to deploy. We proposed ANTspin: Efficient Absolute Localization Method of RFID Tags via the Spinning Antenna, which introduces a rotating table in the experiment.
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