A Direct-solution Method Based on Decoupling Leading Terms Elimination in GNSS Positioning

The Global Navigation Satellite System (GNSS) has been widely used in many fields, such as positioning, navigation and timing applications. Aiming at the case of four satellites in GNSS positioning, a direct-solution method based on the decoupling leading terms elimination (DLTE) has been developed for positioning calculation in this paper. This method reduces the single-point positioning problem to a simple mathematical problem of finding solutions to a set of equations. In comparison with the traditional Least-squares (LS) method, the method proposed in this paper does not require initial position or iterations. Experiments verify the effectivenss of the proposed method.