A Two-Step Method for Multi-GNSS Positioning

In this paper, we devise an efficient approach for the single-point positioning calculation in multi-GNSS receivers. Specifically, we firstly reduce the positioning problem to a simple mathematical problem of finding solutions to the system of ternary linear equations. Subsequently, we take the solutions of equations as the initial position of multi-GNSS receiver, and then use the least-squares (LS) method to determine the precise positioning information. Compared with the common LS method, the proposed two-step method can decrease the computational burden, while cannot affect the positioning accuracy. Simulation results demonstrate the advantage of the proposed method over traditional LS method when dealing with single-point positioning calculation.