Indoor, Outdoor Localization

Indoor/outdoor localization is considered a highly important field in modern society. Localization technologies play a crucial role when GPS (Global Positioning System) signals are limited in confined spaces or indoor environments. To overcome these limitations, our research lab focuses on developing advanced localization technologies.

In the field of indoor localization, we conduct research to obtain accurate indoor positioning information using sensor, wireless communication, and computing technologies. We explore various techniques such as computer vision, sensor networks, and environment modeling to perform indoor positioning. For example, we utilize UWB (Ultra-Wideband) technology to communicate with fixed anchors for precise distance measurements. UWB signals provide low path loss and high distance precision, making them highly valuable for indoor localization. Additionally, pedestrians carry sensors such as accelerometers, gyroscopes, and magnetometers in cell phones or wearable devices, and we employ the PDR (Pedestrian Dead Reckoning) algorithm to estimate walking patterns. These patterns include step count, direction, and speed, which are used to refine and adjust the pedestrian's position. By leveraging these technologies, we can provide innovative solutions for applications such as smart cities, robot exploration, indoor navigation, and location-based services.

In the field of outdoor localization, we research various positioning technologies in addition to GPS. These technologies are particularly useful in GPS-restricted environments like densely built-up areas or underground spaces. To achieve outdoor localization, our research lab utilizes sensors, wireless communication, and GIS (Geographic Information System) to obtain accurate location information. For instance, we collect and analyze data from sources such as Wi-Fi signals, mobile network signals, accelerometers, and gyroscopes to determine the real-time position. Additionally, we develop techniques that incorporate geographical information databases to consider terrain information and building structures for accurate outdoor positioning.