Entangled Quantum Positioning Based on Scattering Free Path Model

Quantum positioning is based on quantum signals to realize target detection. However, the quantum signal is inevitably interfered by the scattering environment during transmission, and the interference changes with the time and transmission path from each Light Source (LS) to the target. It is thereby needed to build up a good strategy for finding the set of the most useful LSs for quantum positioning. Therefore, we propose an entangled quantum positioning method based on the Scattering Free Path (SFP) model. Firstly, the light quantum transmission model is established to describe the change of photon number and transmission distance of the photon. Secondly, the SFP for each LS and each time group is constructed based on environment information and coincidence counting. Thirdly, the SFP sequence for each LS is resampled, and the relative SFP error under each time group is calculated. Finally, the LSs corresponding to the minimum relative errors are selected for each time group to estimate the position coordinate of the target.