Research On Digital Remote Phase Synchronization System

In recent years,in order to achieve long-range microwave precise positioning and multi-unit collaborative working,multi-to-one and multi-to-multi microwave synchronization system are used more and more widely.Multiple satellites,bistatic radar and multistatic radar use this method to complete the detection and position task.However these developments also bring many challenges,in which phase synchronization is the most important point.So in this paper we use the remote phase-locked loop system to study the phase synchronization problem.Meanwhile in practical application,digital signal has better stability,reliability and anti-interference,so we use the method that use digital signal to deal with analog signal to achieve remote phase synchronization.In the paper we introduce the system principle and use the phase-domain analysis model to derive the steady phase output response.Then we use Matlab to simulate and analyze.Finally to realize the digital system we use the CPLD to achieve the phase synchronization digital system so we can verify the practicability of this system in the phase synchronization.Through the principle analysis,simulation and experimental verification,this digital system can achieve phase stability under the relative static state.Meanwhile we analyze the law of phase change under the relative constant motion.This system has a board development space and provide a solution to phase synchronization problem of microwave system under relative motion.