Performance of Passive UHF RFID Systems in Practice

Bolić, Miodrag; Athalye, Akshay; Li, Tzu-Hao

doi:10.1002/9780470665251.ch1

Cited by 12 publications

(13 citation statements)

References 15 publications

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“…We deployed 12 passive tags in 6 reference points, where at each point we deployed two passive tags. 1 The overall area was 1.6m x 1.3m. The difference between the reader antenna and the center of the plane in which the sensatag is placed is 1.8m.…”

Section: Resultsmentioning

confidence: 99%

“…This modulates the signal reflected from the tag antenna to the reader. This tag backscatter is a weak signal that is further affected by multipath reflections and other ambient interferences in cluttered indoor environments like warehouses, retail stores, libraries, and offices [1]. This results in a low signal to noise ratio (SNR) for the tag response received by the reader.…”

Section: A Novel Type Of Rfid Componentmentioning

confidence: 99%

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A Radio Frequency Identification System for accurate indoor localization

Athalye

Savic

Bolić

et al. 2011

2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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Section: Resultsmentioning

confidence: 99%

Section: A Novel Type Of Rfid Componentmentioning

confidence: 99%

A Radio Frequency Identification System for accurate indoor localization

Athalye

Savic

Bolić

et al. 2011

2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)

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“…Passive RFID has been introduced as the supplement for universal product code (UPC) or European article number (EAN) barcodes, and are mostly meant to identify inexpensive small items [5]. Passive RFID tags are battery-less and scavenge the energy to power up the circuitry on the tag.…”

Section: Passive Uhf Rfidmentioning

confidence: 99%

Reducing the phase cancellation effect in augmented RFID system

Wang

Bolić

2015

International Journal of Parallel, Emergent and Distributed Sys

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This paper proposes to use the spatial diversity of dual-antenna to counter the phase cancellation effect in an augmented radio frequency identification (RFID) system, which is developed for accurate indoor localization. In the augmented RFID system, a tag-like semi-passive RFID component (referred as sensatag) senses the backscattering communication between standard ISO 18000-6C compliant RFID reader and passive tags within its proximity. However, due to the superposition of reader's carrier wave (CW), the amplitude difference in the tag's backscattering signal is significantly attenuated at the sensatag's antenna. We refer to such effect as phase cancellation.To counter the destructive phase cancellation effect, two techniques are proposed based on dual-antenna diversity. In the first one called simple combination technique, simple addition of signals from two antennas is performed; in the second one called receiving path selection technique, signals from both antennas are converted into baseband and then conduct the selection in digital domain. Then we demonstrate the performance of these two techniques in a newly developed Proximity-detection-based augmented RFID system simulator (PASS) framework. The result shows that dual-antenna-based implementations are better than the simple antenna implementation in reducing phase cancellation effect. Moreover, receiving path selection technique reduces the probability of phase cancellation significantly with higher hardware complexity compared with simple combination technique.

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“…This backscatter is further affected by multipath reflections and other ambient interferences in cluttered indoor environments like warehouses, retail stores, libraries, and offices [5]. This results in a low signal-to-noise ratio (SNR) of the tag's response received by the reader.…”

Section: Hardware Descriptionmentioning

confidence: 99%

“…This probability depends on various factors, but primarily on the distance between the reference tag and the ST, orientation, and the power of the reader [5]. This probability is easily estimated by counting the number of detections of a tag by an ST in a fixed number of reader queries.…”

Section: Indoor Tracking Using Rfid Systemmentioning

confidence: 99%

Particle filtering for indoor RFID tag tracking

Savic

Athalye

Bolić

et al. 2011

2011 IEEE Statistical Signal Processing Workshop (SSP)

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In this paper, we propose a particle filtering (PF) method for indoor tracking using radio frequency identification (RFID) based on aggregated binary measurements. We use an Ultra High Frequency (UHF) RFID system that is composed of a standard RFID reader, a large set of standard passive tags whose locations are known, and a newly designed, special semi-passive tag attached to an object that is tracked. This semi-passive tag has the dual ability to sense the backscatter communication between the reader and other passive tags which are in its proximity and to communicate this sensed information to the reader using backscatter modulation. We refer to this tag as a sense-a-tag (ST). Thus, the ST can provide the reader with information that can be used to determine the kinematic parameters of the object on which the ST is attached. We demonstrate the performance of the method with data obtained in a laboratory environment

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Performance of Passive UHF RFID Systems in Practice

Cited by 12 publications

References 15 publications

A Radio Frequency Identification System for accurate indoor localization

A Radio Frequency Identification System for accurate indoor localization

Reducing the phase cancellation effect in augmented RFID system

Particle filtering for indoor RFID tag tracking

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