Abstract
Thousands of items are stored in libraries, archives and supermarkets, it usually takes a long time to find what we want in thousands of items. How to achieve precise localization is particularly important. We present a fine-grained Radio Frequency Identification (RFID) positioning method to help us find the items we want. In order to achieve high-precision positioning of RFID tags, we propose Hyperbolic and Hologram Composite (HHC) localization algorithm, which determines the positioning candidate set by hyperbolic intersection, thereby reducing the positioning delay, and then use the holographic positioning to filter the candidate set. We use multi-frequency holography positioning technology to reduce the influence of the reader’s own inaccurate positioning, and use multipath suppression technology to reduce the interference of multipath in the environment, finally achieves higher precision positioning. The experimental results show that the average calculation time of one positioning of our HHC positioning system is 10.3 ms, and 90% of the positioning error margin is below 4.8 cm, which realizes high-precision and low-delay positioning.
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