An indoor navigation system for visually impaired and elderly people based on Radio Frequency Identification (RFID)

摘要

Assisting elderly and/or visually impaired people in locating and navigating in an indoor environment is a very commendable aim. It motivated Tsirmpas et al. to tackle the issue. The main challenge of indoor navigation is that GPS, which works outdoors, cannot be used. But today's technologies open new possibilities to solve indoor navigation. There are several approaches: radio-frequency identification (RFID), Bluetooth, ultra-wideband (UWB), Wi-Fi, microelectromechanical systems (MEMS), near field communication (NFC), infrared light emitting diode (LED), ultrasound, vision-based systems, and so on. A particular challenge of indoor localization is accuracy and dynamic adaptivity to different surroundings.