Shin, Beom ju Jung Ho Lee 유창수 경한결 이택진 2024-01-12T03:01:37Z 2024-01-12T03:01:37Z 2022-08-01 2022-07 0018-9456 https://pubs.kist.re.kr/handle/201004/76670 Stable estimation of a user's position in a wide range of indoor spaces is difficult. In an indoor localization field, a fingerprint method that compares the received signal strength (RSS) vector with the previously collected signal strength vector in a radio map is mostly applied. However, this method is dependent on the infrastructure around it and does not always provide stable performance owing to the severity of RSS noise in an indoor environment, which limits the application of this system. In this article, we propose an indoor positioning system using an accumulated RSS for mobile users. A user spatial RSS pattern is generated using the estimated user trajectory and the accumulated RSS. The user's trajectory is estimated using pedestrian dead reckoning (PDR) technology. In particular, we proposed a novel concept, namely, a heading flag, to estimate a user's relative heading change in a certain period. The user's spatial RSS pattern can be generated using this flag even when the user performs various motions while walking. We developed our own Bluetooth low energy (BLE) beacons and installed few beacons on a testbed for real-time positioning. To demonstrate the performance of the proposed system, we conducted a real field test in an office building. An average position estimation result of less than 2 m was obtained using the proposed system. It is expected that a commercial level location-based service (LBS) will be possible using the proposed system. English Institute of Electrical and Electronics Engineers Received Signal Strength-Based Robust Positioning System in Corridor Environment Article 10.1109/TIM.2022.3190522 1 IEEE Transactions on Instrumentation and Measurement, v.71 IEEE Transactions on Instrumentation and Measurement 71 N scie scopus 000846867100001 Engineering, Electrical & Electronic Instruments & Instrumentation Engineering Instruments & Instrumentation Article INDOOR WIFI LOCALIZATION FINGERPRINT SCHEME Fingerprint recognition Trajectory Estimation Wireless fidelity Receivers Noise measurement smartphone Global navigation satellite system Bluetooth low energy (BLE) fingerprint indoor positioning