介绍基于锁相环多普勒信号跟踪的基本原理,给出锁相环的分析和锁相环滤波器的设计依据。在此基础上,着重对四阶锁相环实现多普勒信号跟踪速度进行了仿真,并提供了加快跟踪速度的可行方法。通过对锁相环的分析和仿真,达到优化设计锁相环电路在多普勒信号跟踪中应用的目的。 This paper introduces the basic principle of Doppler signal tracking based on PLL and gives the analysis of PLL and the design basis of PLL. On this basis, we focus on the fourth-order phase-locked loop Doppler signal tracking speed simulation and provide a feasible method to speed up the tracking speed. Through the analysis and simulation of the phase-locked loop, the purpose of optimizing the design of the phase-locked loop circuit in Doppler signal tracking is achieved.