Design of High-Speed PPM Signal Synchronization Based on FPGA

With the maturity of laser technology and space optical technology, laser communication has become the trend of development. As a modulation method of laser communication, pulse position modulation (PPM) has the characteristics of high power utilization and strong anti-interference ability, which is especially suitable for space applications with precious resources. In this paper, based on FPGA, the high-speed PPM signal is captured and tracked to achieve the synchronization of the signal. In this paper, a parallel sliding correlation algorithm is used to realize acquisition of the PPM signal quickly, and the digital phase locked loop is used to synchronize the signal accurately, which makes the tracking error achieve le-7 level.