Experimental Evaluation of a UHF-MIMO RFID System for Positioning in Multipath Channels

Grebien, Stefan; Galler, Florian; Neunteufel, Daniel; Mühlmann, Ulrich; Maier, Stefan Johannes; Arthaber, Holger; Witrisal, Klaus

doi:10.1109/rfid-ta.2019.8892179

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…It was observed that very few efforts have been undertaken to study the performance improvements of multi-antenna tag designs, which can help improve the sensitivity and range compared to a single antenna tag at the cost of higher cost and power requirements [68]. Similarly, dual-frequency tags (operating both in UHF and GHz band) have only been studied for MIMO RFID systems in [28] and needs to be further evaluated for the enhanced power level allowances in the GHz band. Majority of the articles we reviewed were related to the anti-collision algorithm designs and bulk reading scenarios as this is an area where MIMO RFID systems can improve the gains manyfold.…”

Section: Discussionmentioning

confidence: 99%

“…The indoor channels are usually characterized by a combination of light-of-sight (LOS) component together with dense multipath components (DMC) [26,27]. The authors of [28] propose a UHF MIMO RFID system for high accuracy positioning. A maximum likelihood (ML) direct positioning algorithm for coherent measurements is performed by nearby antennas in a closed setting and non-coherent measurements in long displaced settings.…”

Section: Estimation Techniquesmentioning

confidence: 99%

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MIMO Radio Frequency Identification: A Brief Survey

Alotaibi

Murad

Alhuthali³

et al. 2022

Sensors

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In this paper, we briefly look at the latest state-ot-the-art in the domain of multi-input multi-output (MIMO) radio frequency identification (RFID) systems while detailing the work done in the domain of anti-collision, range enhancements, bit error rate (BER) improvements and security. Various passive ultra-high frequency (UHF) RFID implementations are considered that employ multiple antennas at the reader and single or multiple antennas at each tag. We look at several recent works those explored MIMO for RFID receivers. When using MIMO at the backscatter channel, significant improvements can be achieved in the BER as well as range extension. With the extra reliability and increased throughput, such systems can be deployed in many important applications like large tag reading scenarios and accurate tracking. Increased throughput is directly dependent on estimation of tag quantity in a bulk reading environment and usually estimators designed for single antenna systems under-perform in such settings causing low signal to noise ratio (SNR) when employed in MIMO systems where tag signal overlapping can happen more often. One of the key challenges is to keep the design of the RFID tag simple, cutting cost and power requirement when employing anti-collision schemes. We provide a brief survey in some of the recent developments related to MIMO RFID systems, the protocols and algorithms used, and improvements achieved.

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Section: Discussionmentioning

confidence: 99%

Section: Estimation Techniquesmentioning

confidence: 99%

MIMO Radio Frequency Identification: A Brief Survey

Alotaibi

Murad

Alhuthali³

et al. 2022

Sensors

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“…This ties the patient's information to data on the inter-office activity card; it is then sent to the central system through a digital device. Data concerning the patient's movement are thereby registered [1].…”

Section: Introductionmentioning

confidence: 99%

RFID Positioning and Physiological Signals for Remote Medical Care

Sung¹,

Hsiao²

2022

Computer Systems Science and Engineering

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The safety of patients and the quality of medical care provided to them are vital for their wellbeing. This study establishes a set of RFID (Radio Frequency Identification)-based systems of patient care based on physiological signals in the pursuit of a remote medical care system. The RFID-based positioning system allows medical staff to continuously observe the patient's health and location. The staff can thus respond to medical emergencies in time and appropriately care for the patient. When the COVID-19 pandemic broke out, the proposed system was used to provide timely information on the location and body temperature of patients who had been screened for the disease. The results of experiments and comparative analyses show that the proposed system is superior to competing systems in use. The use of remote monitoring technology makes user interface easier to provide high-quality medical services to remote areas with sparse populations, and enables better care of the elderly and patients with mobility issues. It can be found from the experiments of this research that the accuracy of the position sensor and the ability of package delivery are the best among the other related studies. The presentation of the graphical interface is also the most cordial among human-computer interaction and the operation is simple and clear.

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“…The authors in [5] describe a developed analog 2 × 2 MIMO front end for an RFID rapid prototyping system which allows for various real-time experiments to investigate MIMO techniques such as beamforming, diversity combining, or localization at the reader side. In [6], an experimental evaluation of an UHF MIMO RFID system for positioning is presented, in which the authors propose a set of novel parametric maximum likelihood (ML) direct positioning algorithms capable of exploiting the coherent measurements performed by closely spaced antennas and simultaneously exploiting the non-coherent measurements by widely spaced antennas. In [5], the proposed MIMO concept enabled transmitter-sided digital beamforming after a measurement had been executed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Results and Performance Analysis of a 1 × 2 × 1 UHF MIMO Passive RFID System

Muzamane

Liu

2021

Sensors

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Ultra-high frequency (UHF) multiple input multiple output (MIMO) passive radio frequency identification (RFID) systems have attracted the attention of many researchers in the last few years. The system modeling and theoretical performance analysis of these systems have been well investigated and revealed in many studies, yet the system prototype and the corresponding experimental results are scarce. In this study, measurements of a 1 × 2 × 1 UHF passive RFID system, including a MIMO UHF passive RFID tag prototype and its corresponding software-defined radio-based reader, taken in a microwave anechoic chamber, are presented. The experimental results are compared with theoretical values and computer simulations. The overall results demonstrate the consistency and the feasibility of UHF MIMO passive RFID systems.

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Experimental Evaluation of a UHF-MIMO RFID System for Positioning in Multipath Channels

Cited by 7 publications

References 15 publications

MIMO Radio Frequency Identification: A Brief Survey

MIMO Radio Frequency Identification: A Brief Survey

RFID Positioning and Physiological Signals for Remote Medical Care

Experimental Results and Performance Analysis of a 1 × 2 × 1 UHF MIMO Passive RFID System

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