DOP Analysis for Indoor Hybrid TDOA/TOA Positioning Based on Mobile Communication Network

Mobile communication network could provide time-difference-of-arrival (TDOA) and time-of-arrival (TOA) for hybrid positioning in indoor environment. However, the existing research lacks the analysis of the geometric influence on the hybrid TDOA and TOA positioning accuracy. This paper defines and derives the dilution of precision (DOP) of the hybrid positioning. In the simulation, the DOP distribution of the hybrid positioning is calculated and compared with that of the TDOA-only positioning. The results show that, in the edge of network coverage area, the hybrid TDOA and TOA positioning has a smaller DOP than the TDOA-only positioning, which proves that the method has the potential to achieve higher positioning accuracy.