The Global Positioning System (GPS) has been widely applied in outdoor positioning,\nbut it cannot meet the accuracy requirements of indoor positioning. Comprising an important part of\nthe Internet of Things perception layer, Radio Frequency Identification (RFID) plays an important\nrole in indoor positioning. We propose a novel localization scheme aiming at the defects of existing\nRFID localization technology in localization accuracy and deployment cost, called ANTspin: Efficient\nAbsolute Localization Method of RFID Tags via Spinning Antenna, which introduces a rotary table in\nthe experiment. The reader antenna is fixed on the rotary table to continuously collect dynamic data.\nWhen compared with static acquisition, there is more information for localization. After that, the\nrelative incident angle and distance between tags and the antenna can be analyzed for localization\nwith characteristics of Received Signal Strength Indication (RSSI) data. We implement ANTspin\nusing COTS RFID devices and the experimental results show that it achieves a mean accuracy of\n9.34 cm in 2D and mean accuracy of 13.01 cm in three-dimensions (3D) with high efficiency and low\ndeployment cost.
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