Indoor Visible Light Positioning System Based On Particle Filtering

As one of the most popular categories of mobile services, a rapid growth of indoor location-based services (LBS) has been witnessed over the past decades. Indoor positioning methods based on Ultra Wideband (UWB), Infrared (IR) or WLAN are widely commercialized; however, they have disadvantages such as low accuracy or high cost. Researches are devoted to create an indoor positioning system that is flexible, accurate, and ubiquitous. The widespread deployment of white LEDs for illumination made a rapid growth of visible light communication (VLC) in recent years. According to the advantages of short response time, high transmission rate and excellent modulation performance, VLC is under research recently and it provides a unique opportunity to fill the gap described. Three innovation points are present in this paper:· A novel mechanism using fingerprint database is present in this paper. An emerging method using visible light is under research recently. The existing schemes in visible light positioning (VLP) systems using carrier allocation, time allocation and multiple receivers have limitations respectively and they all need an accurate channel model which is a great challenge in complex indoor environment. This paper presents a mechanism using fingerprint database to solve the problem. But the algorithms described before including fingerprint database have not solved the occlusion sensitivity problem in visible light communication system. The accuracy using fingerprint database and the influence of the relative parameters are analyzed.· The methods of particle filtering are further present in VLP system. Using particle filtering for positioning and tracking has more advantages than fingerprint database only, because it provides extra information such as velocity and acceleration. And this paaper have simulated the path when occlusion occurs using particle filtering and fingerprint database respectively. The result shows, occlusion problem in visible light would be alleviated by particle filtering which will effectively enhance the flexibility for indoor positioning.· The indoor visible light positioning simulation and platform is built. We realized the communication and switch between multi-clients under different LEDs using software and serial port command.