MATLAB-Based GPS Satellite Algorithm Solution for Multi-GNSS Integration

This article addresses the challenge of receiving and separating three major satellite navigation signals—GPS from the United States, GLONASS from Russia, and BeiDou from China—for integration into a combined navigation system on mobile devices. To solve this problem, the author proposes a technical implementation involving NI USRP hardware for signal acquisition and separation. The system utilizes LabVIEW software for real-time signal processing, where algorithms perform correlation-based signal detection, Doppler shift compensation, and navigation data decoding. Key functions include parallel processing of multiple GNSS signals using specialized tracking loops and ephemeris data extraction for each satellite constellation. The calculated position data (including latitude, longitude, and altitude) is then transmitted to mobile devices via wireless protocols. This implementation approach significantly improves positioning accuracy through multi-constellation integration and enhances user experience by providing reliable navigation in challenging environments.