PATL: A RFID Tag Localization based on Phased Array Antenna

Abstract

In RFID systems, how to detect the position precisely is an important and challenging research topic. In this paper, we propose a range-free 2D tag localization method based on phased array antenna, called PATL. This method takes advantage of the adjustable radiation angle of the phased array antenna to scan the surveillance region in turns. By using the statistics of the tags’ number in different antenna beam directions, a weighting algorithm is used to calculate the position of the tag. This method can be applied to real-time location of multiple targets without usage of any reference tags or additional readers. Additionally, we present an optimized weighting method based on RSSI to increase the locating accuracy. We use a Commercial Off-the-Shelf (COTS) UHF RFID reader which is integrated with a phased array antenna to evaluate our method. The experiment results from an indoor office environment demonstrate the average distance error of PATL is about 21 cm and the optimized approach achieves an accuracy of 13 cm. This novel 2D localization scheme is a simple, yet promising, solution that is especially applicable to the smart shelf visualized management in storage or retail area.

Design and test of intelligent inspection and monitoring system for cotton bale storage based on RFID

“…For the monitoring and processing of positioning information 5 , 6 , domestic and foreign experts and scholars have carried out research on multi-sensor fusion technology 7 , 8 , wireless communication technology 9 – 13 , and optimization algorithm technology 14 – 16 , which have effectively improved the intelligence level of critical operation monitoring 17 . Since RFID 18 , 19 has the advantages of non-contact reading of information, large data storage capacity, and small volume 20 – 22 , it could be better applied in monitoring and management of cotton stack storage 23 , and the optimization processing algorithm was adopted to improve positioning 24 , 25 and environmental temperature and humidity monitoring accuracy 26 .…”

Simultaneous User Localization and Identification Using Leaky-Wave Antennas and Backscattering Communications

“…However, existing approaches require immense post processing algorithms which increase the latency of the localization and identification [7]- [17]. In [10], a phased array is used to localize and identify RFID tags which leads to spurious results due to the multipath effect, thus requiring a dedicated post-processing algorithm which increases the latency and the estimation time. Other solutions do not enable the simultaneous localization and identification of the radar echoes and thus they cannot be implemented in 5G communication systems [11], [12], while machine learning-based approaches require a large amount of training data and thus cannot be implemented in random and unknown scenarios [13], [14].…”

Gain characteristics estimation of heteromorphic RFID antennas using neuro‐space mapping

“…Specifically, the antennas are an indispensable part of the tags and the readers. The radiation gains of the tag antenna and the reader antenna determine many quality of service parameters of the RFID system, including interrogation range [5], coverage area [6] and localisation accuracy [7]. Accordingly, how to achieve an accurate gain estimation of the antenna has become a hot issue.…”