Research of GNSS real-time pseudorange differential positioning technology

In the thesis, two pieces of tn-mode navigation receiver board are respectively used as base station and mobile station, communicate through RS232 serial port, which can form a difference positioning system. By analyzing principle of pseudorange differential positioning and the methods of RTCM encoding and decoding, to make them implementation respectively in DSP of the base station and mobile receivers. The experimental results show that accuracy can be doubled by pseudorange differential positioning. It fully verifies correctness of the algorithm and provides a basis for further study.