Implementation of Carrier Phase Synchronization Technology in Pseudo Satellite Transmitter

In order to realize the high-precision positioning of the pseudo-satellite system, a loop for synchronizing the carrier phase of the 4-channel transmitting end of the pseudo-satellite system is designed based on the traditional pseudo-satellite system, and the phase correction is completed to ensure the realtime synchronization of the carrier phase at the transmitting end. By studying the structure of the traditional pseudo-satellite transmitting end, the correction phase of the carrier phase of each channel is added at the pseudo-satellite transmitting end, and the carrier phase of the 4-channel transmitting end of the pseudo-satellite system is realized on the hardware platform with FPGA+DSP as the core. Synchronize. The pseudo-satellite system with closed-loop modified carrier phase is compared with the traditional pseudo-satellite transmitter, and the results of the test are analyzed. The experimental results show that the carrier phase correction loop can effectively synchronize the carrier of each channel of the pseudo-satellite transmitter. The phase is such that the positioning accuracy is increased from 3 cm to about 1 cm.