Phase-based UHF RFID tracking with nonlinear Kalman filtering and smoothing

S. Särkkä, Ville Viikari, Miika Huusko, Kaarle Jaakkola

    Research output: Contribution to journalArticleScientificpeer-review

    58 Citations (Scopus)

    Abstract

    In this paper, we present an UHF RFID location tracking system, which is based on measuring the phases of back scattered signals from RFID tag using multiple spatially distributed antennas at a single carrier frequency. The wavelength ambiguity of the phase measurements is resolved by using the extended Kalman filter (EKF) and the Rauch-Tung-Striebel (RTS) smoother, where the state includes the position, velocity and the phase offsets of antennas. The performance of the method is experimentally verified at 890 MHz using a commercially available RFID reader.
    Original languageEnglish
    Pages (from-to)904-910
    Number of pages7
    JournalIEEE Sensors Journal
    Volume12
    Issue number5
    DOIs
    Publication statusPublished - 2012
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Radio frequency identification (RFID)
    smoothing
    antennas
    carrier frequencies
    Kalman filters
    readers
    ambiguity
    Antennas
    Phase measurement
    Extended Kalman filters
    wavelengths
    Wavelength

    Keywords

    • Extended Kalman filter
    • RFID
    • RTS smoother
    • tracking
    • transponders
    • wireless sensors

    Cite this

    Särkkä, S. ; Viikari, Ville ; Huusko, Miika ; Jaakkola, Kaarle. / Phase-based UHF RFID tracking with nonlinear Kalman filtering and smoothing. In: IEEE Sensors Journal. 2012 ; Vol. 12, No. 5. pp. 904-910.
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    Phase-based UHF RFID tracking with nonlinear Kalman filtering and smoothing. / Särkkä, S.; Viikari, Ville; Huusko, Miika; Jaakkola, Kaarle.

    In: IEEE Sensors Journal, Vol. 12, No. 5, 2012, p. 904-910.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Särkkä, S.

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    AU - Huusko, Miika

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