A Framework for GPS/INS based Portable Positioning System

In this paper, we describe a framework for GPS/INS based Portable Positioning System. The framework includes two main components: receiving terminal and monitoring center. In the receiving terminal, the digital compass and the GPS modules are both connected with an I/O interface in a FPGA to provide an integrated positioning solution. This integrated positioning algorithm can solve the problems arising both in standalone modes and in traditional integrated measurements. In the monitoring center, several improvements have been discussed to ensure runtime efficiency and the robustness of the PPS. The experimental results from two positioning modes validate the effectiveness of the proposed algorithm.