A Novel GPS Measurement Prediction ALgorithm for Fail Safe Navigation

Abstract

When a vehicle passes between tall buildings or through tunnels on land and under bridges on the coast, the GPS signal is weak or blocked. Due to inaccurate raw measurement quality or abrupt transition measurement, it is difficult for carrier phase based navigation to produce precise results. In this paper, a method to create code and carrier phase measurements, using fractional phase statistics under the environment, and maintain resilient navigation is proposed. In order to verify the performance of the proposed method, it is then evaluated by a simulation and Gyeongin Ara waterway test. In the simulation result, the proposed method was compared, for within 10 minutes blocked time. It was confirmed that in the case of weak or blocked satellite signals, the proposed method showed more improved result than from inertial navigation only. Also, the Gyeongin Ara waterway test confirmed that the proposed method maintained a resilient navigation result.arrier phase based navigation to produce precise results. In this paper, a method to create code and carrier phase measurements, using fractional phase statistics under the environment, and maintain resilient navigation is proposed. In order to verify the performance of the proposed method, it is then evaluated by a simulation and Gyeongin Ara waterway test. In the simulation result, the proposed method was compared, for within 10 minutes blocked time. It was confirmed that in the case of weak or blocked satellite signals, the proposed method showed more improved result than from inertial navigation only. Also, the Gyeongin Ara waterway test confirmed that the proposed method maintained a resilient navigation result.