An UWB Indoor Positioning Base Station Selecting Method Based on PDOP

In the ultra-wide band (UWB) indoor scenario, which is affected by the multipath effect, the rational selection of positioning base stations to provide high-precision indoor location services is a hot research topic nowadays. Typically, base station selection is based on link classification with less consideration of base station configuration. In this paper, the Signal Interference Noise Ratio (SINR) of the received signal and the Position Dilution of Precision (PDOP) factor are taken into account to optimize the base stations participating in the positioning computation. The ultimate goal is to increase the positioning accuracy and improve the spatial distribution of the positioning error. Experiments prove that in a $33\mathrm{m}^{\ast}5.1\mathrm{m}^{\ast}3.4\mathrm{m}$ indoor showroom, the algorithm in this paper is compared with the base station selection method based on SINR and the method in which all base stations participate in the localization, etc., and the localization accuracy is improved and the localization results have a certain degree of stability.