User Positioning in mmW 5G Networks Using Beam-RSRP Measurements and Kalman Filtering

Elizaveta Rastorgueva-Foi, Mário Costa, Mike Koivisto, Kari Leppänen, Mikko Valkama

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    27 Citations (Scopus)
    52 Downloads (Pure)


    In this paper, we exploit the 3D-beamforming features of multiantenna equipment employed in fifth generation (5G) networks, operating in the millimeter wave (mmW) band, for accurate positioning and tracking of users. We consider sequential estimation of users' positions, and propose a two-stage extended Kalman filter (EKF) that is based on reference signal received power (RSRP) measurements. In particular, beamformed downlink (DL) reference signals (RSs) are transmitted by multiple base stations (BSs) and measured by user equipments (UEs) employing receive beamforming. The so-obtained beam-RSRP (BRSRP) measurements are reported to the BSs where the corresponding directions of departure (DoDs) are sequentially estimated by a novel EKF. Such angle estimates from multiple BSs are subsequently fused on a central entity into 3D position estimates of UEs by means of another (second-stage) EKF. The proposed positioning scheme is scalable since the computational burden is shared among different network entities, namely transmission/reception points (TRPs) and 5G-NR Node B (gNB), and may be accomplished with the signalling currently specified for 5G. We assess the performance of the proposed algorithm on a realistic outdoor 5G deployment with a detailed ray tracing propagation model based on the METIS Madrid map. Numerical results with a system operating at 39 GHz show that sub-meter 3D positioning accuracy is achievable in future mmW 5G networks.

    Original languageEnglish
    Title of host publication2018 21st International Conference on Information Fusion, FUSION 2018
    Number of pages7
    ISBN (Electronic)978-0-9964527-6-2
    ISBN (Print)978-1-5386-4330-3
    Publication statusPublished - 5 Sept 2018
    Publication typeA4 Article in conference proceedings
    EventInternational conference on information fusion -
    Duration: 10 Jul 201813 Jul 2018


    ConferenceInternational conference on information fusion


    • 5G networks
    • beamforming
    • direction-of-departure
    • extended Kalman filter
    • line-of-sight
    • localization
    • location-awareness
    • positioning
    • RSRP
    • tracking

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Computer Vision and Pattern Recognition
    • Signal Processing
    • Statistics, Probability and Uncertainty
    • Instrumentation

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