。利用理想二阶锁相环构造了三阶 环，对其捕获带宽、时间响应特性、稳定性和误差响应特性进行了仿真研究，分析了三阶环的参数选择 原则和跟踪卫星多普勒频偏的能力，并给出了环路滤波器的数字实现框图-. Ideal second-order phase-locked loop constructed using the third-order loop, its capture bandwidth, time response, stability and response characteris

用MATLAN实现了FLL（锁频环）的热噪声误差、动态应力误差、总的跟踪误差与带宽、预检积分时间等的关系图-MATLAN achieve FLL (frequency-locked loop) thermal noise error and dynamic stress error, the total tracking error and bandwidth, preflight integration time diagram