2개의 이중대역 AP와 스마트폰을 이용한 Wi-Fi LOS 신호 기반의 실내 측위 기법

• Published in: 멀티미디어학회논문지 Vol. 21; no. 5; pp. 583 - 591
• Main Authors: 조현정(Hyeonjeong Jo), 안현성(Hyunseong An), 김승구(Seungku Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국멀티미디어학회 2018
• Subjects: 전자/정보통신공학; Indoor Positioning; LOS/NLOS; Dual-band AP; Wi-Fi; Smartphone
• ISSN: 1229-7771; 2384-0102
• DOI: 10.9717/kmms.2018.21.5.583

With the development of ICT(Information and Communication Technology), the number of smart devices is rapidly increasing. LBS(Location Based Service) applications that provide user's location based service are used in various fields. There is also a growing demand for indoor precision positioning technology to provide seamless services. In this paper, we propose an indoor positioning system that estimates the location of a smartphone user. The proposed algorithm determines whether the received signal is LOS(Line-of-Sight) or NLOS(Non-Line of-Sight) in order to decrease multipath effect by the indoor environment. The proposed positioning algorithm is very simple and requires only the AP(Access Point) coordinates. In addition, it requires only two APs for estimating the location of a smartphone user. The proposed algorithm is a practically applicable technology without any additional hardware and kernel modification in the smartphone. In the experiment results, the reliability of the positioning system was found to be within 0.83 m.