Phase Difference Ranging Study Based on MF R-Mode Signals
摘要
Marine navigation technology is essential for ensuring navigation safety. With the rapid advancement of technology, ship navigation technology has undergone significant evolution from initial ephemeris navigation to the modern Global Navigation Satellite System (GNSS). However, GNSSs suffer from vulnerabilities and susceptibility to interference, prompting researchers to seek more reliable backup systems. As a terrestrial navigation system, the ranging mode (R-Mode) provides a highly accurate alternative. In particular, the medium-frequency (MF) differential GNSS (DGNSS) R-Mode signal has attracted attention for its ability to correct signal delay and calibration. This study simulates the MF DGNSS R-Mode signal for phase difference ranges. The time difference derived from the phase difference can be controlled within 10 ns, and the ranging accuracy can be controlled within 27 m. The simulation results further validate the effectiveness of MF DGNSS R-Mode signals in enhancing the reliability of marine navigation.