Research on Synchronization Technology of Dynamic Environment Signals in the Laser Measurement and Control System

With the development of deep space exploration technology, space laser communication technology has been paid more attention to, and communication and ranging are increasingly integrated. Pulse position modulation (PPM) is more suitable for deep space exploration in many ways. The key and difficulty of the performance of the laser measurement and control system lie in the high-precision synchronization algorithm of the signal. This paper mainly studies the PPM synchronization technology in the laser measurement and control system, which is expected to realize the accurate ranging with low synchronization accuracy under a high dynamic environment. We study the basic framework of laser measurement and control system and the ranging principle. The reason why PPM modulation is chosen to realize the synchronization algorithm is also analyzed. Then, we focus on the capture algorithm based on sliding correlation and the digital delay locking loop tracking algorithm, and design the phase discrimination frequency gain Kv to improve the sensitivity of the loop to first-order dynamics. Finally, the simulation results show that under the input condition of 16-ppm modulation mode, the time synchronization accuracy can meet the requirement of less than 100 ps in the dynamic range of 2000 m/s. Therefore, this technology is of great significance for the development of aerospace, deep space exploration and other fields in the future.