  Localization systems intended for home use by people with mild cognitive
impairment should comply with specific requirements. They should provide the
users with sub-meter accuracy allowing for analyzing patient's movement
trajectory and be energy effective, so the devices do not need frequent
charging. Such requirements could be satisfied by employing a hybrid
positioning system combining accurate UWB with energy efficient Bluetooth Low
Energy (BLE) technology. In the paper, such a solution is presented and
experimentally verified. In the proposed system, user's location is derived
using BLE based fingerprinting. A radio map utilized by the algorithm is
created automatically during system operation with the support of UWB
subsystem. Such an approach allows the users to repeat system calibration as
often as possible, which raises systems resistance to environmental changes.
