Improving Accuracy for 3D RFID Localization

Abstract

Radio Frequency Identification (RFID) becomes a prevalent labeling and localizing technique in the recent years. Deploying indoor RFID localization systems facilitates many applications. Previous approaches, however, are most based on 2D design and cannot provide 3D location information. The lack of one-dimensional information may lead 2D-based systems to inaccurate localization. In this paper, we develop an indoor 3D RFID localization system based on active tag array. In particular, we employ the geometric mean to filter the explicit 3D location information with high accuracy. The experimental results show that our system is efficient in tracking objects and improving the localization accuracy.

Accuracy Improvement of Real-Time Location Tracking for Construction Workers

“…These methods consist of location measurement methods (e.g., triangulation, scene analysis, and proximity), distance measurement methods (e.g., angle of arrival (AOA), received signal strength indication (RSSI), time of arrival (TOA), and time difference of arrival (TDOA)), and technologies (e.g., Infrared, IEEE 802.11, Ultrasonic, ultra wide band (UWB), and RFID). These methods have problems, such as multi-path, obstacle (shadow area), and signal loss [20,21].…”

“…Despite its strengths, it is heavily influenced by environments, which cause multi-paths, obstacles (i.e., shadow areas), or signal loss [20,21]. This is because the accuracy of location sensing largely relies on the strength of the tracking signal [8], which can vary depending on the tracking environment.…”

Novel RFID and ontology based home localization system for misplaced objects

“…Han et al, 2012 [18] Active RFID This is a 3D localization solution based on active reference tags placed as a 3D grid. The distance between 2 adjacent tags is 1 m. Each reader has 2 antennas.…”

“…Han et al, 2012 [18] Accuracy, no need for direct line-of-sight, and nonintrusiveness -Expensive due to the use of a huge amount of active tags -Effort to maintain the active RFID tags' batteries -Not practical and perhaps hazardous to setup a 3D grid of reference tags in the room. -The reference tags make sense to computers but are hard for humans to interpret as physical locations.…”

Multifrequency Phase Difference of Arrival Range Measurement: Principle, Implementation, and Evaluation

“…Battery-free and low cost passive tags can be attached on almost any items, which are recognized as the best medium to achieve precise ranging and positioning for large-scale objects. [7] nearest neighboring + weighting Active 21 cm-29 cm Room Kalman filter RSS mean squares and Kalman filtering Passive 60 cm-1 m 5 m * 5 m Alippi et al [8] R S S B a y e s i a n a p p r o a c h P a s s i v e 6 In this paper, we present an indoor ranging measurement for passive RFID system based on multifrequency carrier phase difference of arrival (MF-PDoA). This approach is inspired by the multifrequency radar ranging system that the transmitter detects the distance from a receiver by measuring the phase differences generated from several transmission frequencies [5].…”