Pseudo-satellite indoor carrier phase positioning algorithm with virtual orbit simulation sources

Aiming at the problem of indoor satellite navigation can not be located, a virtual orbit simulation source pseudo-satellite indoor carrier phase positioning algorithm is proposed, a satellite navigation simulator is used to generate pseudo-satellite signals, the design of the virtual orbit satellite constellation to meet the indoor receiver can be directly located, the carrier phase difference positioning method of multi-epoch measurements is used in the indoor positioning process of the virtual orbit, and the LM (Levenberg-Marquarelt) algorithm is used to correct the pathology of the observation law equation, improve the robustness of the understanding, and achieve the indoor single station carrier phase ambiguity determination, and the simulation results show that the positioning accuracy can reach the centimeter level, which can satisfy the indoor positioning needs in most cases.