Detection of Multiple Tags Based on Impulsive Backscattered Signals

Guidi, Francesco; Decarli, Nicolò; Bartoletti, Stefania; Conti, Andrea; Dardari, Davide

doi:10.1109/tcomm.2014.2363118

Cited by 29 publications

(37 citation statements)

References 50 publications

(71 reference statements)

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“…2 In this way, the polarity of the backscattered signal changes at each chip time T c according to the tag's code value. Notice that, in practical realization of a wideband RFID system, multiple tags can coexist thanks to the adoption of different codes [22]. Other techniques previously proposed include hybrid tags, where the UWB backscatter modulator is activated only when the tag is addressed by another radio interface, such as a standard UHF transponder co-located with the wideband tag.…”

Section: Wideband Backscattering Principlementioning

confidence: 99%

Time Domain Measurements of Signals Backscattered by Wideband RFID Tags

Decarli

Dardari

2018

IEEE Trans. Instrum. Meas.

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Passive wideband RFID is increasing interest for its capability of providing high-accuracy tag localization in addition to identification and tag-reader communication. The measurement of backscattering capabilities of wideband antennas is usually conducted in the frequency domain by using network analyzers. In this paper we present a novel setup for time domain measurements of signals backscattered by wideband RFID tags; the acquired time domain signal samples, were the backscattered signal (i.e., the antenna mode) is not directly observable, are processed with the proposed scheme in order to extract the component of interest. Experimental evaluations are presented for comparing different wideband antennas and show the effects of the setup characteristics and of the processing schemes on the achievable measurement results.

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Section: Wideband Backscattering Principlementioning

confidence: 99%

Time Domain Measurements of Signals Backscattered by Wideband RFID Tags

Decarli

Dardari

2018

IEEE Trans. Instrum. Meas.

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“…The considered UHF-UWB RFID system is depicted in Fig. 3 and was proposed in [38]. In this system, the reader is the only device with capability of transmitting, receiving, and processing signals, whereas tags are passive reflectors.…”

Section: A System Architecturementioning

confidence: 99%

“…Tag detection scheme with range-based least square, range-based BF, and energy profile-based BF. [29], [38].…”

Section: B Energy Profile-based Bayesian Filteringmentioning

confidence: 99%

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Order-of-Arrival of Tagged Objects

Bartoletti

Decarli

Dardari

et al. 2018

IEEE J. Radio Freq. Identif.

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The order-of-arrival (OOA) of a stream of objects moving along a monitored direction is important for many decision operations in logistic and industrial applications. As an example, the dispatch of luggage in airports requires to determine their OOA at checkpoints; as another example, the automatic steering of items in supply chains requires to sort and identify them while moving on a conveyor belt. This paper establishes a general framework for determining the OOA of objects that are moving along a monitored direction via radiofrequency identification (RFID) systems. Three techniques for OOA tracking are proposed and developed for objects equipped with RFID tags possessing ranging capabilities. The benefits of the proposed techniques are experimentally validated based on measurements gathered with a RFID system operating in an indoor environment.

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“…In particular, the presence of x sli (θ b ) leads to the NCP λ m (θ b ) = 2γ m (θ b ) [10,14] , where γ m (θ b ) is the side-lobe-level-to-noise ratio (SLLNR) per bin, given by…”

Section: Side-lobes Effects In Energy Detection Schemesmentioning

confidence: 99%

Energy Detection Performance with Massive Arrays for Personal Radars Applications

Guidi

Guerra

Clemente

et al. 2016

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Abstract. The idea to adopt massive arrays for personal radars applications is facing a rapid growth, thanks to the high scanning resolution achievable with the large number of antennas employed. In fact, such multi-antenna systems enable the possibility to detect and localize surrounding objects through an accurate beamforming procedure. In this paper we show a classical energy-detection approach for target ranging and localization, where the threshold is designed according to the receiver noise only, since an ideal laser-beam antenna is considered. Successively, we show the ambiguities that could arise when the presence of side-lobes cannot be neglected (e.g., when considering real massive arrays instead of ideal pencil-beam like radiation patterns) and we propose a set of guidelines that can be followed from a system design point-of-view to overcome this issue.

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Detection of Multiple Tags Based on Impulsive Backscattered Signals

Cited by 29 publications

References 50 publications

Time Domain Measurements of Signals Backscattered by Wideband RFID Tags

Time Domain Measurements of Signals Backscattered by Wideband RFID Tags

Order-of-Arrival of Tagged Objects

Energy Detection Performance with Massive Arrays for Personal Radars Applications

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