An Efficient Indoor Positioning Method Based on Wi-Fi RSS Fingerprint and Classification Algorithm

Sensors

Kwangjin Park¹  Balaji Ezhumalai¹  Moonbae Song² 

[1] Department of Information and Communication Engineering, Wonkwang University, Iksan 570-749, Korea;Samsung Electronics, Suwon 497-001, Korea;

关键词: indoor positioning;    received signal strength (RSS);    Wi-Fi fingerprint;    SAP similarity;    fingerprint clustering;    RSS extraction;   

DOI  :  10.3390/s21103418

来源: DOAJ

【 摘 要 】

Wi-Fi received signal strength (RSS) fingerprint-based indoor positioning has been widely used because of its low cost and universality advantages. However, the Wi-Fi RSS is greatly affected by multipath interference in indoor environments, which can cause significant errors in RSS observations. Many methods have been proposed to overcome this issue, including the average method and the error handling method, but these existing methods do not consider the ever-changing dynamics of RSS in indoor environments. In addition, traditional RSS-based clustering algorithms have been proposed in the literature, but they make clusters without considering the nonlinear similarity between reference points (RPs) and the signal distribution in ever-changing indoor environments. Therefore, to improve the positioning accuracy, this paper presents an improved RSS measurement technique (IRSSMT) to minimize the error of RSS observation by using the number of selected RSS and its median values, and the strongest access point (SAP) information-based clustering technique, which groups the RPs using their SAP similarity. The performance of this proposed method is tested by experiments conducted in two different experimental environments. The results reveal that our proposed method can greatly outperform the existing algorithms and improve the positioning accuracy by 89.06% and 67.48%, respectively.

【 授权许可】

Unknown