L. Mainetti, L. Patrono, and I. Sergi, A survey on indoor positioning systems, Software, Telecommunications and Computer Networks (SoftCOM), 2014 22nd International Conference on, pp.111-120, 2014.

Y. Gu, A. Lo, and I. Niemegeers, A survey of indoor positioning systems for wireless personal networks, vol.11, pp.13-32, 2009.

D. Cabarkapa, I. Gruji´cgruji´c, and P. Pavlovi´cpavlovi´c, Comparative analysis of the bluetooth low-energy indoor positioning systems, Telecommunication in Modern Satellite, Cable and Broadcasting Services (TELSIKS), 2015 12th International Conference on, pp.76-79, 2015.

P. K. Yoon, S. Zihajehzadeh, B. Kang, and E. J. Park, Adaptive kalman filter for indoor localization using bluetooth low energy and inertial measurement unit, 37th Annual International Conference of the IEEE, pp.825-828, 2015.

A. N. Raghavan, H. Ananthapadmanaban, M. S. Sivamurugan, and B. Ravindran, Accurate mobile robot localization in indoor environments using bluetooth, Robotics and Automation (ICRA), 2010 IEEE International Conference on, pp.4391-4396, 2010.

N. Lasla, A. Bachir, and M. Younis, Area-based vs. multilateration localization: A comparative study of estimated position error, Wireless Communications and Mobile Computing Conference (IWCMC, pp.1138-1143, 2017.

W. Chung, Enhanced rssi-based real-time user location tracking system for indoor and outdoor environments, Convergence Information Technology, pp.1213-1218, 2007.

E. Cassano, F. Florio, F. De-rango, and S. Marano, A performance comparison between roc-rssi and trilateration localization techniques for wpan sensor networks in a real outdoor testbed, Wireless Telecommunications Symposium, pp.1-8, 2009.

A. M. Hossain, H. N. Van, and W. Soh, Fingerprint-based location estimation with virtual access points, Computer Communications and Networks, 2008. ICCCN'08. Proceedings of 17th International Conference on, pp.1-6, 2008.

P. Lin, Q. Li, Q. Fan, X. Gao, and S. Hu, A real-time locationbased services system using wifi fingerprinting algorithm for safety risk assessment of workers in tunnels, Mathematical Problems in Engineering, vol.2014, 2014.

L. B. Del-mundo, R. L. Ansay, C. A. Festin, and R. M. Ocampo, A comparison of wireless fidelity (wi-fi) fingerprinting techniques, ICT Convergence (ICTC), pp.20-25, 2011.

Y. Basiouny, M. Arafa, and A. M. Sarhan, Enhancing wi-fi fingerprinting for indoor positioning system using single multiplicative neuron and pca algorithm, pp.295-305, 2017.

C. Langlois, S. Tiku, and S. Pasricha, , 2017.

J. Röbesaat, P. Zhang, M. Abdelaal, and O. Theel, An improved ble indoor localization with kalman-based fusion: An experimental study, Sensors, vol.17, issue.5, p.951, 2017.

C. Home,

T. Van-dijk, Using Bluetooth Low Energy for room-level localization. Faculty of Mechanical, 2016.

G. Yan, N. Che, H. Liu, and Y. Tang, How to confirm ibeacon direction, Electronic Engineering and Information Science: Proceedings of the International Conference of Electronic Engineering and Information Science 2015 (ICEEIS 2015), p.139, 2015.

S. Sen, R. R. Choudhury, and S. Nelakuditi, Spinloc: Spin once to know your location, Proceedings of the Twelfth Workshop on Mobile Computing Systems & Applications, p.12, 2012.

. European-project-frailsafe, , pp.2018-2021