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Feasible calibration of DOD-based BLE beacon for indoor localization application

In this paper, the authors proposes a easy calibration of DOD-based BLE beacon system for an indoor localization application. By the proposed calibration method, we can easily recognize the orientation and location of the beacon even though the beacons are roughly installed. The method uses DOD calculated from RSSI of received beacon signals and sensor information of the mobile handset for calibration. The experimental results showed the median angular error of the estimated beacon orientation was 2.8∼3.9°. Also, the median distance error of the estimated beacon location was 0.69∼0.72 m.