Research and GPU Parallel Implementation of the Compatibility Analysis Methodology Between FDMA and CDMA Navigation Signals

Many major countries are actively developing their own Global Navigation Satellite Systems (GNSSs) and the compatibility between GNSS signals has become a focus of research. The methodology provided by Recommendation ITU-R M.1831 only applies to interference analysis between CDMA navigation signals and currently there are no compatibility analysis methods applied to FDMA navigation signals. Based on the ITU Recommendation, we propose a new concept named Frequency Division Spectral Separation Coefficient (FD-SSC) for FDMA signals. Furthermore, a compatibility analysis methodology between FDMA signals and between FDMA and CDMA signals is presented based on FD-SSC. Besides, we propose a GPU parallel computing implementation scheme for large scale compute-intensive link calculations in order to improve the computation efficiency. Experimental results show that GPU parallel computing implementation shortens the computation time by more than 20% compared with traditional serial computing implementation. Finally, an application example of the proposed methodology for compatibility analysis between BDS and GLONASS in the B2/L3 band is demonstrated.