Research on Path Loss and Multipath Propagation of Indoor Pseudolite Signal

The indoor positioning technology based on Beidou/GPS pseudolite can improve the indoor signal coverage and geometric configuration. Due to the mechanism of complex environment and navigation signal has not been solved, the stability, reliability and high precision of indoor positioning can not be ensured. Aiming at solving the problem like power attenuation and multipath fading in navigation pseudolite indoor propagation, based on the previous research on indoor communication model, detailed analysis of peculiarities of pseudolite signal and indoor environment is made firstly. Simulation experiments of the pseudolite signal propagation are performed by using ray-tracing method secondly, and then practice tests are performed in real condition. The results show that the corrected log-distance path loss model can accurately describe the path loss feature of pseudolite signal, the carrier phase positioning method can reduce the ranging error brought by multipath propagation.