UWB Indoor Positioning Technology Applications in the LOS and NLOS Scenarios

Indoor positioning has been a major difficulty in the field of positioning due to the complex diversity of indoor environments and the different interference conditions of indoor noise. Its performance and positioning accuracy are better than those of WiFi, Bluetooth and other indoor positioning technologies. However, due to the existence of indoor obstacles, in the case of Non-line-of-sight (NLOS), the performance of UWB positioning technology deteriorates sharply because the common algorithm for UWB positioning is TOA (Time Of Arrival), which has a large additive noise interference in the measurement time. In order to improve the performance of UWB localization algorithm, this paper proposes an iterative weighted compensation localization algorithm based on the common propagation model obeyed by indoor localization, which improves the performance of the UWB localization algorithm by 41.9%, 24.2% and 10.4% in the LOS, DP-NLOS and NDP-NLOS propagation models, respectively.