indoo.rs CaLibre - Unsupervised database free RSSI calibration indoor navigation

Mobile indoor navigation systems, such as those provided by indoo.rs, often use WiFi or Bluetooth RSSI fingerprint maps, as this approach works on most mobile devices. Because of device and antenna characteristics, not all devices report the RSSI for a given input. Therefore, it is difficult to combine data from multiple devices. In the indoo.rs SLAM Crowd Engine, which is used to create the radio maps used for indoor navigation, this is a serious problem, as it fuses pseudonymous navigating user data from arbitrary devices.