Research and implementation of a new all-solid-state digital Loran transmitting technology

This paper conducts a research on a novel all-solid-state digital Loran transmitting technology based on class-D power amplifiers. A new all-solid-state Loran transmitter prototype is developed, and Loran transmission tests are carried out in field environments, realizing rapid and flexible adaptation to field antennas as well as high-precision Loran signal broadcasting. Tests are performed on key indicators including Loran waveform, envelope-to-cycle difference (ECD) adjustment, and time-delay jitter at the third zero-crossing point. The research shows that the novel all-solid-state Loran transmitter adopts a full-digital amplitude synthesis method, which enables full-process control and regulation of the transmitted waveform. The system is flexibly upgradable, adaptable to various transmitting antennas, and can better meet the requirements of the new-generation long-wave Loran navigation and timing system.